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1

German mathematicians in exile in Turkey: Richard von Mises, William Prager, Hilda Geiringer, and their impact  

E-Print Network [OSTI]

German mathematicians in exile in Turkey: Richard von Mises, William Prager, Hilda Geiringer of Mathematics, 80815 Bebek-Istanbul, Turkey b Sabanci University, Faculty of Arts and Social Sciences, Orta Mahalle, Ă?niversite Caddesi No.: 27 34956 Tuzla-Istanbul, Turkey Abstract There is a sizable and growing

Sertöz, Ali Sinan

2

Modeling of stress distributions on the microstructural level in Alloy 600  

SciTech Connect (OSTI)

Stress distribution in a random polycrystalline material (Alloy 600) was studied using a topologically correct microstructural model. Distributions of von Mises and hydrostatic stresses at the grain vertices, which could be important in intergranular stress corrosion cracking, were analyzed as functions of microstructure, grain orientations and loading conditions. Grain size, shape, and orientation had a more pronounced effect on stress distribution than loading conditions. At grain vertices the stress concentration factor was higher for hydrostatic stress (1.7) than for von Mises stress (1.5). The stress/strain distribution in the volume (grain interiors) is a normal distribution and does not depend on the location of the studied material volume i.e., surface vs/bulk. The analysis of stress distribution in the volume showed the von Mises stress concentration of 1.75 and stress concentration of 2.2 for the hydrostatic pressure. The observed stress concentration is high enough to cause localized plastic microdeformation, even when the polycrystalline aggregate is in the macroscopic elastic regime. Modeling of stresses and strains in polycrystalline materials can identify the microstructures (grain size distributions, texture) intrinsically susceptible to stress/strain concentrations and justify the correctness of applied stress state during the stress corrosion cracking tests. Also, it supplies the information necessary to formulate the local failure criteria and interpret of nondestructive stress measurements.

Kozaczek, K.J. [Oak Ridge National Lab., TN (United States); Petrovic, B.G.; Ruud, C.O. [Pennsylvania State Univ., University Park, PA (United States); Mcllree, A.R. [Electric Power Research Inst., Palo Alto, CA (United States)

1995-04-01T23:59:59.000Z

3

Money, Banking and Dynamics: Two Wicksellian routes from Mises to Hayek and Schumpeter  

E-Print Network [OSTI]

Money, Banking and Dynamics: Two Wicksellian routes from Mises to Hayek and Schumpeter By AGNĂ?S be traced back to Wicksell, going from Mises whose Theory of Money and Credit provides, as we shall see theories of business cycles. In this connection, Mises' Theory of Money and Credit and, in particular, his

Paris-Sud XI, Université de

4

PERGAMENTURKUNDEN VON MAINZER ERZBISCHFEN  

E-Print Network [OSTI]

Erstenberger von Freyenthurm, Kammerrat und Keller des Amtes Nieder-Olm, seiner Witwe Anna Maria geb. Burckhard

van Straten, Duco

5

Mathematical model of stress formation during vacuum resin infusion I.B. Sevostianov, V.E. Verijenko*, C.J. von Klemperer, B. Chevallereau1  

E-Print Network [OSTI]

Mathematical model of stress formation during vacuum resin infusion process I.B. Sevostianov, V manufacturing technology based on vacuum infusion which is also known as resin film infusion technology to be infused by the vacuum to completely wet-out the reinforcements and eliminate air voids in the laminate

Sevostianov, Igor

6

Effect of high strain rates on peak stress in a Zr-based bulk metallic glass  

SciTech Connect (OSTI)

The mechanical behavior of Zr{sub 41.25}Ti{sub 13.75}Cu{sub 12.5}Ni{sub 10}Be{sub 22.5} (LM-1) has been extensively characterized under quasistatic loading conditions; however, its mechanical behavior under dynamic loading conditions is currently not well understood. A Split-Hopkinson pressure bar (SHPB) and a single-stage gas gun are employed to characterize the mechanical behavior of LM-1 in the strain-rate regime of 10{sup 2}-10{sup 5}/s. The SHPB experiments are conducted with a tapered insert design to mitigate the effects of stress concentrations and preferential failure at the specimen-insert interface. The higher strain-rate plate-impact compression-and-shear experiments are conducted by impacting a thick tungsten carbide (WC) flyer plate with a sandwich sample comprising a thin bulk metallic glass specimen between two thicker WC target plates. Specimens employed in the SHPB experiments failed in the gage-section at a peak stress of approximately 1.8 GPa. Specimens in the high strain-rate plate-impact experiments exhibited a flow stress in shear of approximately 0.9 GPa, regardless of the shear strain-rate. The flow stress under the plate-impact conditions was converted to an equivalent flow stress under uniaxial compression by assuming a von Mises-like material behavior and accounting for the plane strain conditions. The results of these experiments, when compared to the previous work conducted at quasistatic loading rates, indicate that the peak stress of LM-1 is essentially strain rate independent over the strain-rate range up to 10{sup 5}/s.

Sunny, George; Yuan Fuping; Prakash, Vikas [Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222 (United States); Lewandowski, John [Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222 (United States)

2008-11-01T23:59:59.000Z

7

Asymmetric Yield Function Based on the Stress Invariants for Pressure Sensitive Metals  

SciTech Connect (OSTI)

A general asymmetric yield function is proposed with dependence on the stress invariants for pressure sensitive metals. The pressure sensitivity of the proposed yield function is consistent with the experimental result of Spitzig and Richmond (1984) for steel and aluminum alloys while the asymmetry of the third invariant is preserved to model strength differential (SD) effect of pressure insensitive materials. The proposed yield function is transformed in the space of the stress triaxaility, the von Mises stress and the normalized invariant to theoretically investigate the possible reason of the SD effect. The proposed plasticity model is further extended to characterize the anisotropic behavior of metals both in tension and compression. The extension of the yield function is realized by introducing two distinct fourth-order linear transformation tensors of the stress tensor for the second and third invariants, respectively. The extended yield function reasonably models the evolution of yield surfaces for a zirconium clock-rolled plate during in-plane and through-thickness compression reported by Plunkett et al. (2007). The extended yield function is also applied to describe the orthotropic behavior of a face-centered cubic metal of AA 2008-T4 and two hexagonal close-packed metals of high-purity-titanium and AZ31 magnesium alloy. The orthotropic behavior predicted by the generalized model is compared with experimental results of these metals. The comparison validates that the proposed yield function provides sufficient predictability on SD effect and anisotropic behavior both in tension and compression. When it is necessary to consider r-value anisotropy, the proposed function is efficient to be used with nonassociated flow plasticity by introducing a separate plastic potential for the consideration of r-values as shown in Stoughton & Yoon (2004, 2009).

Jeong Wahn Yoon; Yanshan Lou; Jong Hun Yoon; Michael V. Glazoff

2014-05-01T23:59:59.000Z

8

Hilbert von Neumann modules  

E-Print Network [OSTI]

We introduce a way of regarding Hilbert von Neumann modules as spaces of operators between Hilbert space, not unlike [Skei], but in an apparently much simpler manner and involving far less machinery. We verify that our definition is equivalent to that of [Skei], by verifying the `Riesz lemma' or what is called `self-duality' in [Skei]. An advantage with our approach is that we can totally side-step the need to go through $C^*$-modules and avoid the two stages of completion - first in norm, then in the strong operator topology - involved in the former approach. We establish the analogue of the Stinespring dilation theorem for Hilbert von Neumann bimodules, and we develop our version of `internal tensor products' which we refer to as Connes fusion for obvious reasons. In our discussion of examples, we examine the bimodules arising from automorphisms of von Neumann algebras, verify that fusion of bimodules corresponds to composition of automorphisms in this case, and that the isomorphism class of such a bimodule...

Bikram, Panchugopal; Srinivasan, R; Sunder, V S

2011-01-01T23:59:59.000Z

9

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzflachenstruktur von  

E-Print Network [OSTI]

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzflšachenstruktur von Wasser auf der Rušachen . . . . . . . . . . . . . . . . . 30 3 Grundlagen der Adsorptionssysteme 33 3.1 Wasserstoff auf Ru(001 die Wasserstoff­Bršuckenbindung . . . . . . . . 41 3.2.2 Kristallines Eis im Volumen

Wolf, Martin

10

CONTRIBUTION A LA MISE EN PLACE DU POLE GEOMATIQUE DE LA MIMEL  

E-Print Network [OSTI]

CONTRIBUTION A LA MISE EN PLACE DU POLE GEOMATIQUE DE LA MIMEL ELABORATION ET STRUCTURATION DE COUCHES "SIG" SUR LA REGLEMENTATION DES PECHES MARITIMES, SUR LES CULTURES MARINES ET SUR LA SENSIBILITE'étude............................................................................................................. 4 2 Réglementation des pêches maritimes et cultures marines

Boyer, Edmond

11

LES DIFFICULTES RENCONTREES LORS DE LA MISE EN PLACE D'UN SYSTEME HSE  

E-Print Network [OSTI]

98-86 LES DIFFICULTES RENCONTREES LORS DE LA MISE EN PLACE D'UN SYSTEME HSE SUR DE PETITS SITES INDUSTRIELS > Introduction Le systÚme de management de l'hygiÚne, de la sécurité et de l'environnement que. Un référentiel HSE a été calqué sur la structure de l'ISO 14001, afin de bénéficier de la

Paris-Sud XI, Université de

12

A two-dimensional finite element thermomechanical approach to a global stress-strain analysis of steel continuous casting  

E-Print Network [OSTI]

of steel continuous casting Michel Bellet, Alban Heinrich Ecole des Mines de Paris, Centre de Mise en Forme.bellet@ensmp.fr Synopsis This paper addresses the two-dimensional finite element simulation of steel continuous casting state (temperature, deformation, stresses) of steel all along the continuous casting machine. Both plane

Boyer, Edmond

13

alps monitoring von: Topics by E-print Network  

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340 Auswirkungen von traumatischen Kriegserlebnissen auf die psychische Gesundheit von Kosovo-Albanern im Kosovo. Open Access Theses and Dissertations Summary: ??Ziel dieser Studie...

14

Das GARCH Modell zur Modellierung von Finanzmarktzeitreihen  

E-Print Network [OSTI]

Das GARCH Modell zur Modellierung von Finanzmarktzeitreihen Seminararbeit von Frauke Heuermann Juni ARCH(1)-Prozess . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Der GARCH-Prozess 5 2.1 Der GARCH(1,1)-Prozess . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Das vierte Moment und die W

Alsmeyer, Gerold

15

Seite 1 von 3 Fachgebiet Rechnerarchitektur  

E-Print Network [OSTI]

-Zahl Zweikomplement-Zahl 0100 1101 1001 0001 i) BCD (Binary coded decimal) stellt jede (vorzeichenlose) Dezimalziffer mittels 4 Bit dar. In der ungepackten Version (unpacked BCD) ist je Byte eine Ziffer, in EBCDIC (von IBM) werden die oberen 4 Bits mit 1111 belegt. Bei der gepackten #12;Seite 2 von 3 Version (packed BCD) sind

Hoffmann, Rolf

16

Studies of solid high-power targets Goran Skoro  

E-Print Network [OSTI]

VonMisesStress[MPa] Comparison of the simulations results: Stress in real target vs. stress in tungsten wire Stress in tungsten or 3) cm in diameter. · Energy density per pulse ~ 300 J/cc. · Rotating toroidal ring (operating-beam lifetime/fatigue tests hardly possible · Shock can be modelled: Finite Element Software (FES) · Target

McDonald, Kirk

17

Mise en place du systme de TMA dans les croles du Surinam : dveloppement interne ou contact de langues1 ?  

E-Print Network [OSTI]

1 Mise en place du systÚme de TMA dans les créoles du Surinam : développement interne ou contact de anglaise du Surinam, et du ndyuka en particulier, montre une régularité à la fois dans les formes et dans différentes époques de contact. Les créoles de base lexicale anglaise du Surinam, résultat du contact entre

Paris-Sud XI, Université de

18

E-Print Network 3.0 - anwendung von neutronenstreuung Sample...  

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Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

19

E-Print Network 3.0 - anwendung von uhpfrc-tubbingen Sample Search...  

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Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

20

E-Print Network 3.0 - anwendung von radiopharmaka Sample Search...  

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Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

E-Print Network 3.0 - austrag von platin Sample Search Results  

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glhenden Platins ausgestrahlte Licht (Sur la lumire mise par le platine incandescent); Inaug. Diss... fonction dfinie de sa temprature.. M. Nichions a cherch la...

22

The Hartree-von Neumann limit of many body dynamics  

E-Print Network [OSTI]

In the mean-field regime, we prove convergence (with explicit bounds) of the many-body von Neumann dynamics with bounded interactions to the Hartree-von Neumann dynamics.

I. Anapolitanos; I. M. Sigal

2009-04-29T23:59:59.000Z

23

als medium von: Topics by E-print Network  

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Information Technology) Prof. Dr. Andreas Rausch (Software Systems Engineering Zachmann, Gabriel 7 Bachelorarbeit Integration von PDF-Formularen als Multidisciplinary...

24

als homologem von: Topics by E-print Network  

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Information Technology) Prof. Dr. Andreas Rausch (Software Systems Engineering Zachmann, Gabriel 7 Bachelorarbeit Integration von PDF-Formularen als Multidisciplinary...

25

als folge von: Topics by E-print Network  

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Information Technology) Prof. Dr. Andreas Rausch (Software Systems Engineering Zachmann, Gabriel 12 Bachelorarbeit Integration von PDF-Formularen als Multidisciplinary...

26

The role of von Neumann and Lüders postulates in the EPR-Bohm-Bell considerations: Did EPR make a mistake?  

E-Print Network [OSTI]

We show that the projection postulate plays a crucial role in the discussion on the so called "quantum nonlocality", in particular in the EPR-argument. We stress that the original von Neumann projection postulate was crucially modified by extending it to observables with degenerate spectra (the L\\"uders postulate) and we show that this modification is highly questionable from a physical point of view, and it is the real source of "quantum nonlocality". The use of the original von Neumann postulate eliminates this problem: instead of "action at the distance"-nonlocality, we obtain a classical measurement nonlocality. It seems that EPR did mistake in their 1935-paper: if one uses correctly von Neumann projection postulate, no ``elements of reality'' can be assigned to entangled systems. Our analysis of the EPR and projection postulate makes clearer Bohr's considerations in his reply to Einstein.

Andrei Khrennikov

2008-01-02T23:59:59.000Z

27

Von Economo Neurons in the Elephant Brain  

E-Print Network [OSTI]

Von Economo Neurons in the Elephant Brain ATIYA Y. HAKEEM,1 * CHET C. SHERWOOD,2 CHRISTOPHER J elephants. The VENs in the elephant are primarily found in similar locations to those in the other species- nids, cetaceans, and elephants, and may reflect a specialization for the rapid transmission of crucial

Allman, John M.

28

Normalizers of Finite von Neumann Algebras  

E-Print Network [OSTI]

\\subseteq M is an inclusion of separable II_1 factors. We show that N_M(B) imposes a certain "discrete" structure on the generated von Neumann algebra. By analyzing the bimodule structure of certain subalgebras of N_M(B)'', this leads to a "Galois...

Cameron, Jan Michael

2010-10-12T23:59:59.000Z

29

Einsatz von Web Services im Semantic Web  

E-Print Network [OSTI]

Einsatz von Web Services im Semantic Web am Beispiel der RACER Engine und OWL-QL Jan Galinski Aufbau der Arbeit . . . . . . . . . . . . . . . . . . . . . 2 2 Grundlagen 5 2.1 Semantic Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.1 Komponenten des Semantic Web . . . . . . . . . . . . . . . . . . . . 6 2.1.2 ReprÀsentation

Moeller, Ralf

30

Seite 1 von 7 Fachgebiet Rechnerarchitektur  

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0100 1101 1001 0001 1110 1110 1110 1111 i) BCD (Binary coded decimal) stellt jede (vorzeichenlose) Dezimalziffer mittels 4 Bit dar. In der ungepackten Version (unpacked BCD) ist je Byte eine Ziffer, in EBCDIC (von IBM) werden die oberen 4 Bits mit 1111 belegt. Bei der gepackten Version (packed BCD) sind zwei

Hoffmann, Rolf

31

3D Postprozessor Diplomarbeit von Samuel Gerber  

E-Print Network [OSTI]

3D Postprozessor Diplomarbeit von Samuel Gerber Fachhochschule Aargau FHA University of Appliedšangsschnitt . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.4 Querschnit . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.5 3D-Bilder . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 3D Ansicht . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Bericht

Gerber, Samuel

32

E-Print Network 3.0 - ausbringung von kofermentationsrckstnden...  

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Planeten wird wrmer. Um eine deutliche Klimaerwrmung von... Atmosphre oder die solare Einstrahlung verringern. Die Bandbreite der Manahmen, die bereits ... Source:...

33

E-Print Network 3.0 - abschaetzung von klimaschutzstrategien...  

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Mathematics 2 Zusammenfassung This is a tutorial on teaching and programming in MATLAB. Summary: Inhaltsverzeichnis 1 Vektoren und Matrizen 5 1.1 Definition von Vektoren......

34

Ingenieurgeologische Untersuchungen zur Hinterfüllung von Geothermie-Bohrungen mit Erdwärmesonden.  

E-Print Network [OSTI]

??Im Rahmen der Arbeit wurden Untersuchungen an Baustoffen, die zur Verfüllung von Erdwärmesonden-Bohrungen im Bereich der oberflächennahen Geothermie eingesetzt werden, durchgeführt. Die Langzeitbeständigkeit sowie der… (more)

Herrmann, Verena Johanna

2008-01-01T23:59:59.000Z

35

E-Print Network 3.0 - air erfassung von Sample Search Results  

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Technologies and Information Sciences 34 Feature Net ein Ansatz zur Modellierung von automobil-spezifischem Domnenwissen und Anforderungen Summary: Erfassung von Anforderungen und...

36

E-Print Network 3.0 - auslegung von hybrid- Sample Search Results  

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gewhrleistet die Freizgig- keit von Arbeitskrften... Botschaft in Dar es Salaam. Von li.: TGCL-Projektleiterin Prof. Dr. Ulrike Wanitzek; Hon. Deputy Minister Source:...

37

E-Print Network 3.0 - auslegung von hebezeugen Sample Search...  

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gewhrleistet die Freizgig- keit von Arbeitskrften... Botschaft in Dar es Salaam. Von li.: TGCL-Projektleiterin Prof. Dr. Ulrike Wanitzek; Hon. Deputy Minister Source:...

38

E-Print Network 3.0 - alphastrahlen-exposition von beschaeftigten...  

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Sample search results for: alphastrahlen-exposition von beschaeftigten Page: << < 1 2 3 4 5 > >> 1 Exemplarische Studienplne Beispiel I Summary: -Methoden Module im Um- fang von...

39

E-Print Network 3.0 - auswirkungen von klimaabhaengigen Sample...  

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Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

40

E-Print Network 3.0 - abhaengigkeit von klima Sample Search Results  

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Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

E-Print Network 3.0 - auswirkungen kartierung von Sample Search...  

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Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

42

E-Print Network 3.0 - andrew von eschenbach Sample Search Results  

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results for: andrew von eschenbach Page: << < 1 2 3 4 5 > >> 1 Charles Brenner, Norris Cotton Cancer Center, Dartmouth Medical School Summary: Stratton, and NCI Director Andrew von...

43

Niederdruck-Überschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen für polarisierte gastargets  

E-Print Network [OSTI]

Niederdruck-Überschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen für polarisierte gastargets

Nass, A

2002-01-01T23:59:59.000Z

44

Von Ungarn nach Auschwitz: Die verschwiegene Warnung.  

E-Print Network [OSTI]

schre i b t , daß 90% nach Ausch w i t z - B i r k e n a u gesch i c k t wurde n und der Rest nach ander e n Orten in Deuts c h l a n d . Ebd., S. 160. In Ungarn waren vor allem Oberst l e u t n a n t Lászl ó Feren c y und Lászl ó Baky , ein 13... Sándor Szenes : geb. 1924 in Buda p e s t, hat die Depo r tatio n e n 1944 miterleb t . Er wurd e n ach Dach a u vers c h lep p t, ins KZ Lands b e r g verle g t und dort von amer ik a n...

Baron, Frank; Szenes, Sá ndor

2010-10-19T23:59:59.000Z

45

Förderung von Deutsch als Zweitsprache durch generatives Schreiben auf Basis einer Sprachstandsdiagnose nach USB DaZ in Ö im morphologisch-syntaktischen Bereich.  

E-Print Network [OSTI]

??Diese Masterarbeit beschäftigt sich mit dem Zusammenspiel von Sprachstandsdiagnose und Sprachförderung. Praktisch umgesetzt wurde dies in der Erstellung von Übungen, die der Förderung von Deutsch… (more)

Scharinger, Ursula

2013-01-01T23:59:59.000Z

46

The Amalgamated Free Product of Hyperfinite von Neumann Algebras  

E-Print Network [OSTI]

of a hyperfinite von Neumann algebra and a finite number of interpolated free group factors. We then show that this class is closed under this type of amalgamated free product. After that we allow amalgamation over possibly infinite dimensional...

Redelmeier, Daniel

2012-07-16T23:59:59.000Z

47

C.F.von Weizsäcker-High Energy Physics  

ScienceCinema (OSTI)

C.F.von Weizsäcker (1912-2007),physicien,philosophe et "chercheur de paix", prit la décision de faire des études de physique sous l'influence de W.Heisenberg qu'il rencontra en 1927.

None

2011-04-25T23:59:59.000Z

48

,,START-UP BRACHFLCHE" Arbeitshilfe zur Erarbeitung von Projektplnen  

E-Print Network [OSTI]

,,START-UP BRACHFLÄCHE" Arbeitshilfe zur Erarbeitung von Projektplänen #12;#12;,,START-UP Preuß Volker Schrenk Kai Steffens Karolin Weber Stuttgart, April 2005 #12;START-UP-BRACHFLÄCHE Impressum;START-UP-BRACHFLÄCHE 3 Inhalt Abbildungsverzeichnis

Cirpka, Olaf Arie

49

(as) Verbessert eine Infusion von Knochenmarkzellen in die Kranzgefe die Herzfunktion nach einem Infarkt? Wenn ja,  

E-Print Network [OSTI]

(as) Verbessert eine Infusion von Knochenmarkzellen in die KranzgefÀ�e die Herzfunktion nach einem

Manstein, Dietmar J.

50

E-Print Network 3.0 - analyse von ribo- Sample Search Results  

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of Science Collection: Chemistry 69 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

51

E-Print Network 3.0 - analyse von ladungsschichtung Sample Search...  

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and Information Sciences 27 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

52

E-Print Network 3.0 - auer-haus-verpflegung analyse von Sample...  

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and Information Sciences 27 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

53

E-Print Network 3.0 - analyse von handlungsstrukturen Sample...  

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and Information Sciences 33 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

54

E-Print Network 3.0 - analyse von grnden Sample Search Results  

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and Information Sciences 39 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

55

E-Print Network 3.0 - analyse von p53 Sample Search Results  

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and Information Sciences 56 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

56

E-Print Network 3.0 - abfallhaltung von natuerlicher Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Universitt Hamburg Summary: Prof. Dr. Hans von Storch GKSS-Forschungszentrum Geesthacht Max-Planck-Strae 21502 Geesthacht Prof. Dr... - - - - - - - - - - - - - - - - - -...

57

Introduction to foundations of probability and randomness (for students in physics), Lectures given at the Institute of Quantum Optics and Quantum Information, Austrian Academy of Science, Lecture-1: Kolmogorov and von Mises  

E-Print Network [OSTI]

The education system for students in physics suffers (worldwide) from the absence of a deep course in probability and randomness. This is the real problem for students interested in quantum information theory, quantum optics, and quantum foundations. Here the primitive treatment of probability and randomness may lead to deep misunderstandings of theory and wrong interpretations of experimental results. Since during my visits (in 2013 and 2014) to IQOQI a number of students (experimenters!) asked me permanently about foundational problems of probability and randomness, especially inter-relation between classical and quantum structures, this year I gave two lectures on these problems. Surprisingly the interest of experiment-oriented students to mathematical peculiarities was very high. This (as well as permanent reminding of prof. Zeilinger) motivated me to write a text based on these lectures which were originally presented in the traditional black-board form. I hope that this might be useful for students from IQOQI as well as other young physicists.

Andrei Khrennikov

2014-10-19T23:59:59.000Z

58

Ab Frhjahr 2009 startet hier der Bau von sechs Offshore-  

E-Print Network [OSTI]

Ab FrĂŒhjahr 2009 startet hier der Bau von sechs Offshore- Windenergieanlagen (OWEA) vom Typ Ent- wicklung der Offshore-Wind- energie besondere Bedeutung zu. Derzeit laufen in der Aus Vorhaben durchgefĂŒhrt. Acht Einleitung Ziel der Bundesregierung ist es, bis zum Jahr 2030 Offshore

Vollmer, Heribert

59

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks  

E-Print Network [OSTI]

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks durch ihren semileptonischen Zerfall in Myonen mit dem H1-Detektor bei HERA Determination of the ep Cross Section for Beauty Quarks via werden die sichtbaren ep-Wirkungsquerschnitte fur schwere Quarks in dem kinematischen Bereich Q2

60

John von Neumann Institute for Computing Monte Carlo Protein Folding  

E-Print Network [OSTI]

John von Neumann Institute for Computing Monte Carlo Protein Folding: Simulations of Met://www.fz-juelich.de/nic-series/volume20 #12;#12;Monte Carlo Protein Folding: Simulations of Met-Enkephalin with Solvent-Accessible Area difficulties in applying Monte Carlo methods to protein folding. The solvent-accessible area method, a popular

Hsu, Hsiao-Ping

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Marshall's and Milnor's Conjectures for Preordered von Neumann Regular Rings  

E-Print Network [OSTI]

Marshall's and Milnor's Conjectures for Preordered von Neumann Regular Rings M. Dickmann F a proper preorder T, satisfies Marshall's signature conjecture and Milnor's Witt ring conjecture (for result can be summarized as follows: 1) Marshall's signature conjecture was proved in [DM1

62

besondere Verdienste um die Frderung von Technik und  

E-Print Network [OSTI]

der E.ON Future Award in der Leibniz UniversitĂ€t Hannover verlie- hen. Die E.ON Energie AG hat diesen können sich fĂŒr den E.ON Future Award, der von E.ON auch an der TU MĂŒnchen ver- liehen wird, alle Me- dien die besten ausgewĂ€hlt: · Den mit jeweils 5.000 Euro dotierten E.ON Future Award fĂŒr eine

Vollmer, Heribert

63

E-Print Network 3.0 - abhaengigkeit von der Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

von ,stereo vision als Basis zur ... Source: Folgheraiter, Michele - Robotics Innovation Center, DFKI Bremen Collection: Engineering 5 Die Ziege auf der kreisfoermigen...

64

E-Print Network 3.0 - alexander von humboldt Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Information Summary: initiatives I. Programme Every year, the Alexander von Humboldt Foundation grants up to three Humboldt Alumni... . The award is designed to promote initiatives...

65

E-Print Network 3.0 - aus sicht von Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

D3.201 Geometrische Mechanik und Summary: Variationsprinzipien beruht, basiert der Hamilton-Formalismus auf der Beobachtung von Energien im System. In dieser... Veranstaltung...

66

E-Print Network 3.0 - antitumorale wirkung von Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Storch ist Direktor des Instituts fr Kstenforschung am GKSS-Forschungszentrum in Geesthacht... . Bitte erlutern Sie warum. Hans von Storch: Ich halte das IPCC fr eine sehr...

67

E-Print Network 3.0 - applications wirkungen von Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Storch ist Direktor des Instituts fr Kstenforschung am GKSS-Forschungszentrum in Geesthacht... . Bitte erlutern Sie warum. Hans von Storch: Ich halte das IPCC fr eine sehr...

68

E-Print Network 3.0 - acquired von willebrand Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Hans von Storch, Institute for Coastal Research, GKSS Research Centre Geesthacht, Germany The Institute... .huenicke@gkss.de) at GKSS. References Bindoff, N.L.,...

69

E-Print Network 3.0 - activates von willebrand Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Hans von Storch, Institute for Coastal Research, GKSS Research Centre Geesthacht, Germany The Institute... .huenicke@gkss.de) at GKSS. References Bindoff, N.L.,...

70

E-Print Network 3.0 - application konditionierung von Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

konditionierung von Page: << < 1 2 3 4 5 > >> 1 Influence of moisture content on EPR parameters of copper in impregnated wood Summary: gnierung mit drei verschiedenen...

71

E-Print Network 3.0 - absorption von tev-photonen Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: absorption von tev-photonen Page: << < 1 2 3 4 5 > >> 1 MASSFLOW EFFECTS ONWAVE HEATING...

72

auto-validating von neumann: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

quantum processors with more traditional approach. Alexander Yu. Vlasov 2003-11-27 5 Fractal von Neumann entropy Mathematical Physics (arXiv) Summary: We consider the it...

73

E-Print Network 3.0 - anlagenteile von kernkraftwerken Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

wir nun von ... Source: Lygeros, John - Nondeterministic and Stochastic Hybrid Systems, ETH Zurich Collection: Engineering 3 Wasserbau und Wasserkraft32 Fachbeitrge...

74

E-Print Network 3.0 - auslegung von kernkraftwerken Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

wir nun von ... Source: Lygeros, John - Nondeterministic and Stochastic Hybrid Systems, ETH Zurich Collection: Engineering 4 A. E. K. Ris Rktt-M-I lei? Title and authors)...

75

E-Print Network 3.0 - ausfuhr von mineraloel Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: exemplari- schen Losung von MU-Problemen am Beispiel der Sprachpaare Deutsch-Englisch und Deutsch... -Franzosisch zu entwickeln. Die zentralen Themen der...

76

Optimierung von Redoxpolymeren für Biosensoren und Biobrennstoffzellen und ihre Stabilisierung auf Elektrodenoberflächen.  

E-Print Network [OSTI]

??Im Rahmen dieser Arbeit wurde eine neue, optimierte Synthesestrategie für die modlulare Herstellung von Redoxpolymeren auf Basis einer Epoxidöffnungsreaktion entwickelt. Es wurden Methoden zur Stabilisierung… (more)

Pöller, Sascha

2013-01-01T23:59:59.000Z

77

E-Print Network 3.0 - anaerobe ammoniakoxidation von Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Otto-Von-Guericke-UniVersitat Magdeburg, UniVersitatsplatz 2, D-39106 Magdeburg, Germany... acid (MA) under aerobic and anaerobic conditions was investigated. The Ce(IV)...

78

Remote Tomography Via von Neumann-Arthurs-Kelly Interaction  

E-Print Network [OSTI]

Teleportation usually involves entangled particles 1,2 shared by Alice and Bob, Bell-state measurement on particle 1 and system particle by Alice, classical communication to Bob, and unitary transformation by Bob on particle 2. We propose a novel method: interaction-based remote tomography. Alice arranges an entanglement generating von Neumann-Arthurs-Kelly interaction between the system and two apparatus particles, and then teleports the latter to Bob. Bob reconstructs the unknown initial state of the system not received by him by quadrature measurements on the apparatus particles .

S. M. Roy; Abhinav Deshpande; Nitica Sakharwade

2013-08-23T23:59:59.000Z

79

Von Ardenne Anlagentechnik GmbH | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformationSEDS data Jump to: navigation, search ToolVoithVolusia County,Von

80

DGPF Tagungsband 18 / 2009 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs  

E-Print Network [OSTI]

DGPF Tagungsband 18 / 2009 407 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs HENRI EISENBEISS 1 , WERNER STEMPFHUBER 1 & MICHAEL KOLB 2 Zusammenfassung: Nach einer EinfĂŒhrung ĂŒber UAVs und einer Beschreibung von ver- schiedenen UAV-Systemen wird im vorliegenden Artikel eine Methode fĂŒr die

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

1-D closure models for slender 3-D viscoelastic free jets: von Karman flow geometry and elliptical cross section  

SciTech Connect (OSTI)

In this paper we derive one space dimensional, reduced systems of equations (1-D closure models) for viscoelastic free jets. We begin with the three-dimensional system of conservation laws and a Maxwell-Jeffreys constitutive law for an incompressible viscoelastic fluid. First, we exhibit exact truncations to a finite, closed system of 1-D equations based on classical velocity assumptions of von Karman. Next, we demonstrate that the 3-D free surface boundary conditions overconstrain these truncated systems, so that only a very limited class of solutions exist. We then proceed to derive approximate 1-D closure theories through a slender jet asymptotic scaling, combined with appropriate definitions of velocity, pressure and stress unknowns. Our nonaxisymmetric 1-D slender jet models incorporate the physical effects of inertia, viscoelasticity (viscosity, relaxation and retardation), gravity, surface tension, and properties of the ambient fluid, and include shear stresses and time dependence. Previous special 1-D slender jet models correspond to the lowest order equations in the present asymptotic theory by an a posteriori suppression to leading order of some of these effects, and a reduction to axisymmetry. Solutions of the lowest order system of equations in this asymptotic analysis are presented: For the special cases of elliptical inviscid and Newtonian free jets, subject to the effects of surface tension and gravity, our model predicts oscillation of the major axis of the free surface elliptical cross section between perpendicular directions with distance down the jet, and drawdown of the cross section, in agreement with observed behavior. 15 refs.

Bechtel, S.E.; Forest, M.G.; Holm, D.D.; Lin, K.J.

1988-01-01T23:59:59.000Z

82

bungsaufgaben zum Freitag 14.6 1) Rntgen-Bragg Reflexion von Silizium  

E-Print Network [OSTI]

Sie die Rydberg Formel 3.2 aus 3.1 her! d) Die ersten Linien der Paschen-Serie im Wasserstoff-Konstanten von Wasserstoff RH nm. Blatt09 #12;

WĂŒnsche, Hans-JĂŒrgen "Ede"

83

E-Print Network 3.0 - akzeptanz von internet Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OG) Summary: , Berlin N.N. 08.11.2011 Prof. Dr. Hans von Storch Helmholtz-Zentrum Geesthacht Institut fr... -Luther-Universitt Halle - Wittenberg Institut fr Psychologie...

84

E-Print Network 3.0 - akzeptanz von rentenreformen Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OG) Summary: , Berlin N.N. 08.11.2011 Prof. Dr. Hans von Storch Helmholtz-Zentrum Geesthacht Institut fr... -Luther-Universitt Halle - Wittenberg Institut fr Psychologie...

85

From Alexander von Humboldt to Charles Darwin: Evolution in Observation and Interpretation  

E-Print Network [OSTI]

“From Alexander von Humboldt to Charles Darwin: Evolution in Observation and Interpretation.” Internet Zeitschrift für Kulturwissensdhaften, 17. Nr. February 2010. http://www.inst.at/trans/17Nr/7-8/7-8_baron17.htm. Publisher’s official version... citation: “From Alexander von Humboldt to Charles Darwin: Evolution in Observation and Interpretation.” Internet Zeitschrift für Kulturwissensdhaften, 17. Nr. February 2010. http://www.inst.at/trans/17Nr/7-8/7- 8_baron17.htm Text of paper: From...

Baron, Frank

2010-02-01T23:59:59.000Z

86

Theoria 49: 107-114, 2004. Apuntes sobre la vida y la obra de Georg Henrik von Wright*  

E-Print Network [OSTI]

Theoria 49: 107-114, 2004. Apuntes sobre la vida y la obra de Georg Henrik von Wright* (Georg Henrik von Wright. In Memoriam) Daniel GONZÁLEZ LAGIER BIBLID [0495-4548 (2004) 19: 49; pp. 107-114] I Georg Henrik von Wright nació en Helsinki el 14 de Junio de 1916 y falleció en esa misma ciudad el 16 de

Machery, Edouard

87

Transformation von Multiphysics-Modellen in einen FPGA-Entwurf für den echtzeitfähigen HiL-Test eingebetteter Systeme.  

E-Print Network [OSTI]

??Mit der vorliegenden Arbeit wird eine durchgängige Werkzeugkette von der Modellbildung physikalischer Simulationen bis zur Entwurfsautomatisierung für FPGA-basierte Echtzeitsimulationen etabliert. Modelica wurde als vielseitige, intuitive… (more)

Köllner, Christian

2013-01-01T23:59:59.000Z

88

Revisiting Alexander von Humboldt's Initiation of Rock Coating Research Author(s): Ronald I. Dorn, David H. Krinsley, Jeffrey Ditto  

E-Print Network [OSTI]

Revisiting Alexander von Humboldt's Initiation of Rock Coating Research Author(s): Ronald I. Dorn, David H. Krinsley, Jeffrey Ditto Reviewed work(s): Source: The Journal of Geology, Vol. 120, No. 1 Revisiting Alexander von Humboldt's Initiation of Rock Coating Research Ronald I. Dorn,1, * David H. Krinsley

Dorn, Ron

89

Bei Abgabe per Email (helmut.buergmann@eawag.ch) bitte "Vorlesung Stoffwechsel" in den Header! Stoffwechsel von Mikroorganismen HS 2013  

E-Print Network [OSTI]

verschiedene GĂ€rungsprozesse bei denen Wasserstoff entsteht. A) Geben Sie ein Beispiel (Reaktionsgleichung oder Schema) B) Welchen Zweck erfĂŒllt die Herstellung von Wasserstoff fĂŒr den gĂ€renden Organismus? C) Welche anderen Stoffwechselwege nutzen den von GĂ€rern hergestellten Wasserstoff? #12;

Wehrli, Bernhard

90

Information Im Rahmen der Konzernnormung von BMW ist ab 01.04.2013 ein Praktikum fr die Dauer  

E-Print Network [OSTI]

Information Im Rahmen der Konzernnormung von BMW ist ab 01.04.2013 ein Praktikum für die Dauer von Standort: BMW Forschungs- und Innovationszentrum, München, Knorrstr. 147 Vollzeit: 35 h/ Woche Abt./Absender TI-509/ Arnd Früngel Telefon +49-89-382-18375 Fax E-Mail arnd.fruengel@bmw.de Kopie an Datum 15

Wichmann, Felix

91

TECHNISCHE UNIVERSITT Htte die Katastrophe von Fukushima durch Roboter verhindert werden knnen? Forscher behaupten ja und haben zu einem  

E-Print Network [OSTI]

TECHNISCHE UNIVERSIT�T HÀtte die Katastrophe von Fukushima durch Roboter verhindert werden können Roboter die Atom-Katastrophe von Fukushima hÀtten verhindern können ­ wenn es denn welche gegeben hÀtte

Stryk, Oskar von

92

Logic and Philosophy in the Century That Was It is a great pleasure to write in honour of Georg-Henrik von Wright. We met around  

E-Print Network [OSTI]

-Henrik von Wright. We met around 1980, when he came as a distinguished visitor to the philosophical institute in Groningen, where a Dutch student defended a dissertation on von Wright's intellectual Werdegang. The student taught Jaakko Hintikka". Von Wright's address makes many points which I would consider `received history

Amsterdam, University of

93

Give Stress a Rest  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

It's an instinctive response that helps us protect ourselves by placing the body and mind on "alert." Causes of stress can be as simple as a loud noise or as complicated as...

94

E-Print Network 3.0 - adelbert von chamisso Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(fl.), F. W. H. A. von Humboldt et A. J. A. Bonpland s.n. (B-W 02374 -00 0... here): SURINAME. Loco non indicato, (fl.), C. G. Dahlberg s.n. (SBT 4.2.7.83). As Chamisso... ), and...

95

John von Neumann Institute for Computing Inhibition of Fibril Formation of  

E-Print Network [OSTI]

John von Neumann Institute for Computing Inhibition of Fibril Formation of Beta-Amyloid Peptides N of Fibril Formation of Beta-Amyloid Peptides Nguyen Sy Lam1 , Maksim Kouza2 , Hoang Zung1 , and Mai Suan Li2 the aggregation process. 1 Introduction In many cases protein aggregates take the form of amyloid fibrils, which

Kouza, Maksim

96

Universal Remote Boot and Administration Service Sebastian Schmelzer, Dirk von Suchodoletz  

E-Print Network [OSTI]

Universal Remote Boot and Administration Service Sebastian Schmelzer, Dirk von Suchodoletz: {danielw,bona}@inf.ufpr.br carlos@fisica.ufpr.br Abstract--Booting operating systems over the network. Remote booting Linux and using PXE based environments for large scale system deployments are widely

97

famelab-germany.de FameLab Germany wird prsentiert von  

E-Print Network [OSTI]

famelab-germany.de FameLab Germany wird prÀsentiert von Du ... studierst oder arbeitest in den Wissenschaftskommunikation #12;Anmeldung & Videos famelab-germany.de Let's taLK science! FameLab-Vorentscheid 22. MÀrz Medien- und Kommuni- kationstraining 5. + 6. April Berlin Finale FameLab Germany: 10. Mai Bielefeld

Hamburg,.UniversitÀt

98

Formblatt LM Ma Informatik Version Oktober 2012 Zuordnung von Lehrmodulen im Masterstudium Informatik  

E-Print Network [OSTI]

Formblatt LM Ma Informatik Version Oktober 2012 Zuordnung von Lehrmodulen im Masterstudium KomplexitÀt Modul-Nr. Name (Kurzform) KP Note PR Programmierung LM 1 VI Verteilte Informationssysteme LM 2 PV Parallele und Vert. Systemarchitekturen LM 3 OC Organic Computing LM 4 IE Intelligente eingebettete Systeme

LĂŒbeck, UniversitĂ€t zu

99

Formblatt LM Ma Informatik Version Mai 2010 Zuordnung von Lehrmodulen im Masterstudium Informatik  

E-Print Network [OSTI]

Formblatt LM Ma Informatik Version Mai 2010 Zuordnung von Lehrmodulen im Masterstudium Informatik-Nr.^+ KP LZF Note PR Programmierung LM 1 VI Verteilte Informationssysteme LM 2 PV Parallele und Vert. Systemarchitekturen LM 3 OC Organic Computing LM 4 IE Intelligente eingebettete Systeme Summe KP SB Signal- und

LĂŒbeck, UniversitĂ€t zu

100

PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Fehlerminimierung und Regularisierung  

E-Print Network [OSTI]

PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Fehlerminimierung und Regularisierung: Fehlerminimierung #12;PD Dr. Martin Stetter, Siemens AG 2 Maximum-Likelihood und Fehlerminimierung · Likelihood: Fehlerfunktionen #12;PD Dr. Martin Stetter, Siemens AG 3 · Def. Fehlerfunktion: 0))|(,,( wxfyxl yxyyx ,0),,( =lmit

Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation  

E-Print Network [OSTI]

PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation · Bayes`sches Schließen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 2 Ziel maschinellen Lernens (=statistische Inferenz) · Man Datenmodellen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 3 Bayes`sches Schließen · Es gilt, die Daten

Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

102

MEAN DIMENSION, MEAN RANK, AND VON NEUMANN-L UCK RANK  

E-Print Network [OSTI]

MEAN DIMENSION, MEAN RANK, AND VON NEUMANN-L šUCK RANK HANFENG LI AND BINGBING LIANG Abstract. We introduce an invariant, called mean rank, for any module M of the integral group ring of a discrete amenable group , as an analogue of the rank of an abelian group. It is shown that the mean dimension

Li, Hanfeng

103

Press Release Von Roll Inova to build the UK's largest energy-from-waste  

E-Print Network [OSTI]

, and regenerative heat recovery is used to boost the plant's overall energy efficiency. The majority of the wastePress Release Von Roll Inova to build the UK's largest energy-from-waste plant ZĂŒrich, September, 1 Roll Inova will build the UK's largest energy-from-waste facility. The contract is worth approximately

Columbia University

104

Aufbau eines Frequenz-vervierfachten Diodenlasers fr die Photoionisation von Magnesium  

E-Print Network [OSTI]

Aufbau eines Frequenz-vervierfachten Diodenlasers fĂŒr die Photoionisation von Magnesium this work, the construction and implementation of a laser-system for photo- ionization of magnesium is described. Finally, spectroscopic measurements of dierent magnesium isotopes are discussed with particular

Blatt, Rainer

105

John von Neumann Institute for Computing Different Types of Protein Folding Identified with  

E-Print Network [OSTI]

John von Neumann Institute for Computing Different Types of Protein Folding Identified://www.fz-juelich.de/nic-series/volume40 #12;Different Types of Protein Folding Identified with a Coarse-Grained Heteropolymer Model Stefan The identification of folding channels is one of the key tasks of protein folding studies. While secondary structures

Janke, Wolfhard

106

NANOTECHNOLOGY CENTER Eine Partnerschaft in Nanotechnologie von IBM Research und ETH Zrich  

E-Print Network [OSTI]

NANOTECHNOLOGY CENTER Eine Partnerschaft in Nanotechnologie von IBM Research und ETH ZĂŒrich and Rohrer Nanotechnology Center is part of a strategic partnership in nanosciences with ETH Zurich, one FACT SHEET Above: The campus of IBM Research - Zurich Right: The Binnig and Rohrer Nanotechnology

Cachin, Christian

107

DT/GTI -SS 2009 47Darstellung von Information Bits und Bytes  

E-Print Network [OSTI]

· 7 Bit pro Zeichen EBCDIC (Extended Binary Coded Decimal Interchange Code) · IBM Erweiterung des BCD Information Darstellung von Zeichen ASCII (American Standard Code for Information Interchange), ISO, DIN 66003 Codes · 8 Bit pro Zeichen · 0000 0000 - 0011 1111 Kontrollzeichen 0100 0000 - 0111 1111 Satzzeichen 1000

Hellebrand, Sybille

108

DT/GTI -SS 2011 49Darstellung von Information Bits und Bytes  

E-Print Network [OSTI]

BCD Codes · 8 Bit pro Zeichen · 0000 0000 - 0011 1111 Kontrollzeichen 0100 0000 - 0111 1111 Information Darstellung von Zeichen ASCII (American Standard Code for Information Interchange), ISO, DIN 66003 · 7 Bit pro Zeichen EBCDIC (Extended Binary Coded Decimal Interchange Code) · IBM Erweiterung des

Hellebrand, Sybille

109

A Fractal Comparison of M.C. Escher's and H. von Koch's Tessellations  

E-Print Network [OSTI]

A Fractal Comparison of M.C. Escher's and H. von Koch's Tessellations B. Van Dusen1 , B.C. Scannell determined by hyperbolic geometry, his work is often mistakenly described as following fractal geometry. Here, we perform a `box-counting' scaling analysis on Circle Limit III and an equivalent mono- fractal

Colorado at Boulder, University of

110

Seite 1 von 1 Antrag auf eine nderung im Modulkatalog der Fakultt EI  

E-Print Network [OSTI]

Seite 1 von 1 Antrag auf eine Änderung im Modulkatalog der Fakultät EI FR-Sitzung am Antragsteller (Modulverantwortlicher) Modul-ID EI Name des Moduls SWS: V / Ü / P ECTS: WS SoSe Dozent/en Art der Änderung: Streichung in einer Studienrichtungsempfehlung im BSc EI enthalten? Ja; Nein Die geplanten Änderungen sind mit

Kuehnlenz, Kolja

111

Single-cone real-space finite difference schemes for the Dirac von Neumann equation  

E-Print Network [OSTI]

Two finite difference schemes for the numerical treatment of the von Neumann equation for the (2+1)D Dirac Hamiltonian are presented. Both utilize a single-cone staggered space-time grid which ensures a single-cone energy dispersion to formulate a numerical treatment of the mixed-state dynamics within the von Neumann equation. The first scheme executes the time-derivative according to the product rule for "bra" and "ket" indices of the density operator. It therefore directly inherits all the favorable properties of the difference scheme for the pure-state Dirac equation and conserves positivity. The second scheme proposed here performs the time-derivative in one sweep. This direct scheme is investigated regarding stability and convergence. Both schemes are tested numerically for elementary simulations using parameters which pertain to topological insulator surface states. Application of the schemes to a Dirac Lindblad equation and real-space-time Green's function formulations are discussed.

Schreilechner, Magdalena

2015-01-01T23:59:59.000Z

112

Seite 1 von 2 Virtual Trained-in-GermanY China  

E-Print Network [OSTI]

Seite 1 von 2 Einladung Virtual Trained-in-GermanY China 17.04.2014, 10h00 - 18h00 CST www.trained-in-germany Virtual Trained in GermanY in Brasilien, Indien und SĂŒdafrika findet die nĂ€chste virtuelle Jobmesse fĂŒr Deutschland-Alumni in China statt: www.trained-in-germany.com/china. Die Trained in German

Hellebrand, Sybille

113

Von Neumann-Lueders projection, and its applicability to EPR experiments  

E-Print Network [OSTI]

Notwithstanding it is well known that von Neumann's projection postulate is inapplicable to most realistic measurement procedures, it keeps haunting the foundations of quantum mechanics. In particular its applicability to EPR experiments is often assumed. In the present contribution this problem is considered from the point of view of a quantum mechanical theory of measurement, allowing a treatment of projection in EPR experiments as a special case of conditional preparation. The conditions are spelled out under which the postulate may be applicable.

Willem M. de Muynck

2008-10-06T23:59:59.000Z

114

Projektarbeit Basisjahr 2010 12. Mrz 2010 Installation von Bluetooth-Dongle und Serial-Port  

E-Print Network [OSTI]

Projektarbeit Basisjahr 2010 12. MĂ€rz 2010 Installation von Bluetooth-Dongle und ­Serial-Port Mini CD · Dongle anbringen Im GerĂ€te Manager ĂŒberprĂŒfen · BlueSoleil starten Serial Port · GerĂ€t Parani. Benutzt dazu eine BĂŒroklammer und drĂŒckt einige Zeit auf auf dem Bluetooth COM- Port. · Merkt

115

Time evolution of gluon coherent state and its von Neumann entropy in heavy-ion collisions  

E-Print Network [OSTI]

We propose a new prescription for evaluating a von Neumann entropy in the initial stage of high-energy heavy-ion collisions utilizing the time evolution of classical Yang-Mills (CYM) field: The von Neumann entropy is computed for the quantum coherent states constructed so as to give the classical gluon fields as the expectation values. The entropy is to be liberated when the complete decoherence is achieved. As a demonstration, the time evolution of the CYM dynamics is solved with an initial condition which mimics the Glasma state, though in a non-expanding geometry; the Glasma state is characterized by the longitudinal color-electric and -magnetic fields with gluon fields' fluctuations around it. We find that the initial longitudinal fluctuations of the fields play essential roles for the entropy production in two ways: First, the field fluctuations at $t=0$ themselves act as a source of the von Neumann entropy prepared before the time evolution. Second, the initial fluctuations triggers field instabilities, and hence the larger the strength of them, the more the entropy production at later time.

Hideaki Iida; Teiji Kunihiro; Akira Ohnishi; Toru T. Takahashi

2014-10-27T23:59:59.000Z

116

Contact stress sensor  

DOE Patents [OSTI]

A method for producing a contact stress sensor that includes one or more MEMS fabricated sensor elements, where each sensor element of includes a thin non-recessed portion, a recessed portion and a pressure sensitive element adjacent to the recessed portion. An electric circuit is connected to the pressure sensitive element. The circuit includes a pressure signal circuit element configured to provide a signal upon movement of the pressure sensitive element.

Kotovsky, Jack

2014-02-11T23:59:59.000Z

117

A luminescent nanocrystal stress gauge  

SciTech Connect (OSTI)

Microscale mechanical forces can determine important outcomes ranging from the site of material fracture to stem cell fate. However, local stresses in a vast majority of systems cannot be measured due to the limitations of current techniques. In this work, we present the design and implementation of the CdSe/CdS core/shell tetrapod nanocrystal, a local stress sensor with bright luminescence readout. We calibrate the tetrapod luminescence response to stress, and use the luminescence signal to report the spatial distribution of local stresses in single polyester fibers under uniaxial strain. The bright stress-dependent emission of the tetrapod, its nanoscale size, and its colloidal nature provide a unique tool that may be incorporated into a variety of micromechanical systems including materials and biological samples to quantify local stresses with high spatial resolution.

Choi, Charina; Koski, Kristie; Olson, Andrew; Alivisatos, Paul

2010-10-25T23:59:59.000Z

118

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-21(39) 3.2.3 Basis--Darstellung natrlicher Zahlen  

E-Print Network [OSTI]

Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d. h. jede3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-21(39) 3.2.3 Basis.2 Codes 3-22(40) Beweis: Wir verwenden den Satz von der Division mit Rest: Zu 0 und gibt es einen

Arndt, Holger

119

Butz, T. and von Stryk, O.: Modelling and Simulation of ER and MR Fluid Dampers 1 ZAMM Z. angew. Math. Mech. 78 (1998) 0, 122  

E-Print Network [OSTI]

Butz, T. and von Stryk, O.: Modelling and Simulation of ER and MR Fluid Dampers 1 ZAMM · Z. angew. Math. Mech. 78 (1998) 0, 1­22 Butz, T.; von Stryk, O. Modelling and Simulation of Electro, phenomenological models, numerical simulation, pas- sive suspension MSC (1991): 65C20, 76A05 1 Introduction Electro

Stryk, Oskar von

120

43. Zur aktuellen Situation von Apis mel-lifera meda im Iran. K Bienefeld 1, GH Tah-K Bienefeld1 , GH Tah-  

E-Print Network [OSTI]

43. Zur aktuellen Situation von Apis mel- lifera meda im Iran. K Bienefeld 1, GH Tah-K Bienefeld1, Iran; 3 Institut fĂŒr Bienenkunde, Karl-von- Frisch-Weg 2, D-61440 Oberursel, Deutsch- land) Bis zu den in Iran Up to the political changes in 1979, many queens (Midnight and Starline hybrids) were imported

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Transport and Induced Elastic Stress  

E-Print Network [OSTI]

Title: Variational Approach in Studying the Mixture of the Fluids: Transport and Induced Elastic Stress Abstract: From the energetic point of view, most ...

122

HTTF Core Stress Analysis  

SciTech Connect (OSTI)

In accordance with the need to determine whether cracking of the ceramic core disks which will be constructed and used in the High Temperature Test Facility (HTTF) for heatup and cooldown experiments, a set of calculation were performed using Abaqus to investigate the thermal stresses levels and likelihood for cracking. The calculations showed that using the material properties provided for the Greencast 94F ceramic, cracking is predicted to occur. However, this modeling does not predict the size or length of the actual cracks. It is quite likely that cracks will be narrow with rough walls which would impede the flow of coolant gases entering the cracks. Based on data recorded at Oregon State University using Greencast 94F samples that were heated and cooled at prescribed rates, it was concluded that the likelihood that the cracks would be detrimental to the experimental objectives is small.

Brian D. Hawkes; Richard Schultz

2012-07-01T23:59:59.000Z

123

Residual stresses and stress corrosion cracking in pipe fittings  

SciTech Connect (OSTI)

Residual stresses can play a key role in the SCC performance of susceptible materials in PWR primary water applications. Residual stresses are stresses stored within the metal that develop during deformation and persist in the absence of external forces or temperature gradients. Sources of residual stresses in pipe fittings include fabrication processes, installation and welding. There are a number of methods to characterize the magnitude and orientation of residual stresses. These include numerical analysis, chemical cracking tests, and measurement (e.g., X-ray diffraction, neutron diffraction, strain gage/hole drilling, strain gage/trepanning, strain gage/section and layer removal, and acoustics). This paper presents 400 C steam SCC test results demonstrating that residual stresses in as-fabricated Alloy 600 pipe fittings are sufficient to induce SCC. Residual stresses present in as-fabricated pipe fittings are characterized by chemical cracking tests (stainless steel fittings tested in boiling magnesium chloride solution) and by the sectioning and layer removal (SLR) technique.

Parrington, R.J.; Scott, J.J.; Torres, F.

1994-06-01T23:59:59.000Z

124

1995, 33(10):2757.J. Clin. Microbiol. T Eaton, J O Falkinham 3rd and C F von Reyn  

E-Print Network [OSTI]

1995, 33(10):2757.J. Clin. Microbiol. T Eaton, J O Falkinham 3rd and C F von Reyn cigarettes, American Society for Microbiology NOTES Recovery of Mycobacterium avium from Cigarettes TWILLA EATON,1 glass filter holders (Millipore Corporation, Bedford,

Falkinham, Joseph

125

X-ray diffraction experiments with femtosecond time D. VON DER LINDE and K. SOKOLOWSKI-TINTEN  

E-Print Network [OSTI]

X-ray diffraction experiments with femtosecond time resolution D. VON DER LINDE and K. SOKOLOWSKI-essen.de (Received 4 March 2002) Abstract. Intense ultrashort laser pulses enable the generation of subpico- second X-ray pulses in the multi-kilovolt range of photon energies. These X- ray pulses have opened the door

von der Linde, D.

126

Original article Growth stresses in tension wood  

E-Print Network [OSTI]

Original article Growth stresses in tension wood: role of microfibrils and lignification T Okuyama the growth stress generation in the region of normal and tension woods. growth stress/ tension wood in normal and ten- sion wood. The compressive stress from the deposition of lignin controls the level

Paris-Sud XI, Université de

127

Bern, 25.02.2011 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 25.02.2011 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t Bern unterstĂŒtzte Forschung Organigramm US-Behörde mit Einordnung NIH OMB: bestimmt Ziel, HĂ€ufigkeit Umfang und andere Aspekte von Audits. Sobald die jĂ€hrlich ausgegebenen Geldmittel fĂŒr ein NIH-Projekt bzw

Richner, Heinz

128

Thermal stresses in laminated beams  

E-Print Network [OSTI]

of the material constants for each lamina are defined for the case of plane stress as follows: C =C =2G+X=E (2+u) /2 (1+u) (9) and C =C 3=X=Ev/2 (1+v) (10) where a and a are the stresses, Cll and C13 are the i i xx . zz . i i material properties and T... stresses, strains, temperature, and material characteristics for the . th i lamina. z j 2 r 1 c =C11Du -Cllz. D we@11 ( tDe 1 i 2 i 2 +C De (z. -it)-C ( D e [z. t+ ? (1-2j) ] t 11 xz. i ll . 1 zz. i 2 i j=l 3 2 -C11D e 2 +C11D e (z. it) i 2 i i 2 zz...

Marcano, Victor Manuel

1983-01-01T23:59:59.000Z

129

Nr. 210 / 2014 // 4. Nov. 2014 Von re.: Dr. Markus Zanner, Kanzler der Universitt Bayreuth; Prof. Dr. Stefan Leible, Prsident  

E-Print Network [OSTI]

S. 1/ 5 Nr. 210 / 2014 // 4. Nov. 2014 Von re.: Dr. Markus Zanner, Kanzler der UniversitÀt Bayreuth Prof. Dr. Stefan Leible, dem Kanzler der Universi- tÀt Dr. Markus Zanner und dem Vorsitzenden des zu können", erklÀrt Dr. Markus Zanner. ,,Die GesprÀche mit der MeinFernbus GmbH sind immer kooperativ

Ott, Albrecht

130

Litigation Stress: Causes and Remedies  

E-Print Network [OSTI]

Being named a defendant in a medical malpractice lawsuit can be a devastating experience. It is particularly painful for first-time defendants who experience the blow of having their professional competence questioned, along with a host of other emotions attendant to litigation, such as anger, fear, frustration, self-doubt and self-pity. Combined, these effects can create a high degree of psychological stress that can endanger the physician’s mental, physical and emotional well-being. Researchers who have studied the subject have coined the term “litigation stress syndrome ” to describe the condition that in some way affects most medical professionals when they are sued

unknown authors

2000-01-01T23:59:59.000Z

131

Microelectromechanical systems contact stress sensor  

SciTech Connect (OSTI)

A microelectromechanical systems stress sensor comprising a microelectromechanical systems silicon body. A recess is formed in the silicon body. A silicon element extends into the recess. The silicon element has limited freedom of movement within the recess. An electrical circuit in the silicon element includes a piezoresistor material that allows for sensing changes in resistance that is proportional to bending of the silicon element.

Kotovsky, Jack (Oakland, CA)

2007-12-25T23:59:59.000Z

132

Enhanced von Weizsäcker Wang-Govind-Carter kinetic energy density functional for semiconductors  

SciTech Connect (OSTI)

We propose a new form of orbital-free (OF) kinetic energy density functional (KEDF) for semiconductors that is based on the Wang-Govind-Carter (WGC99) nonlocal KEDF. We enhance within the latter the semi-local von Weizsäcker KEDF term, which is exact for a single orbital. The enhancement factor we introduce is related to the extent to which the electron density is localized. The accuracy of the new KEDF is benchmarked against Kohn-Sham density functional theory (KSDFT) by comparing predicted energy differences between phases, equilibrium volumes, and bulk moduli for various semiconductors, along with metal-insulator phase transition pressures. We also compare point defect and (100) surface energies in silicon for a broad test of its applicability. This new KEDF accurately reproduces the exact non-interacting kinetic energy of KSDFT with only one additional adjustable parameter beyond the three parameters in the WGC99 KEDF; it exhibits good transferability between semiconducting to metallic silicon phases and between various III-V semiconductors without parameter adjustment. Overall, this KEDF is more accurate than previously proposed OF KEDFs (e.g., the Huang-Carter (HC) KEDF) for semiconductors, while the computational efficiency remains at the level of the WGC99 KEDF (several hundred times faster than the HC KEDF). This accurate, fast, and transferable new KEDF holds considerable promise for large-scale OFDFT simulations of metallic through semiconducting materials.

Shin, Ilgyou [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States)] [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States); Carter, Emily A., E-mail: eac@princeton.edu [Department of Mechanical and Aerospace Engineering, Program in Applied and Computational Mathematics, and Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544-5263 (United States)

2014-05-14T23:59:59.000Z

133

Cell Component Accelerated Stress Test Protocols for PEM Fuel...  

Broader source: Energy.gov (indexed) [DOE]

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells Accelerated Stress Test Protocols for PEM...

134

Determination of Longitudinal Stress in Rails  

E-Print Network [OSTI]

The objective of this research is to determine the longitudinal stress in rails by using the polarization of Rayleigh waves. Analytical models are developed to describe the effect of applied stress on wave speed and on the polarization of Rayleigh...

Djayaputra, Ferdinand

2012-02-14T23:59:59.000Z

135

Stress, health, and the sense of coherence  

E-Print Network [OSTI]

It has been well established that increased stress adversely affects one's health. The bulk of the previous research has focused on the vulnerabilities of their subjects to increased stress or decreased health status. Antonovsky proposes...

Edmiston, John A

1996-01-01T23:59:59.000Z

136

UNIVERSITY OF SUSSEX STRESS MANAGEMENT POLICY  

E-Print Network [OSTI]

UNIVERSITY OF SUSSEX STRESS MANAGEMENT POLICY CONTENTS 1. INTRODUCTION 1.1 Introductory note 1.2 Note on terminology 2. STRESS MANAGEMENT POLICY 2.1 Policy statement 2.2 Stress in the workplace 2, promotion and transfer / redeployment iv) Absence management v) Return to work after absence vi) Training

Sussex, University of

137

Tensile Effective Stresses in Hydrocarbon Storage Caverns  

E-Print Network [OSTI]

Tensile Effective Stresses in Hydrocarbon Storage Caverns Hippolyte Djizanne and Pierre BĂ©rest LMS, Germany,1-2 October 2012 TENSILE EFFECTIVE STRESSES IN HYDROCARBON STORAGE CAVERNS Hippolyte Djizanne1 that effective tensile stresses can be generated at a cavern wall after a rapid increase or decrease in pressure

Paris-Sud XI, Université de

138

Tensile effective stresses in hydrocarbon storage caverns  

E-Print Network [OSTI]

The "no-tensile effective stress" criterion is discussed. It is proven that effective tensile stresses can be generated at a cavern wall after a rapid increase or decrease in pressure. The Etzel K-102 test, performed in Germany more than 20 years ago, is revisited using the notion of effective tensile stresses.

Djizanne, Hippolyte; Brouard, Benoît

2013-01-01T23:59:59.000Z

139

T-Quark Mass and Hyperfinite II1 von Neumann factor  

E-Print Network [OSTI]

A theoretical model based on the D4 Lie Algebra and Hermitian Symmetric Spaces D5 / D4xU(1) and E6 / D5xU(1) allows calculation of ratios of tree-level particle masses (quark masses being constituent masses): Me-neutrino = Mmu-neutrino = Mtau-neutrino = 0 Me = 0.5110 MeV (assumed); Md = Mu = 312.8 MeV; Mmu = 104.8 MeV; Ms = 625 MeV; Mc = 2.09 GeV; Mtau = 1.88 GeV; Mb = 5.63 GeV; Mt = 130 GeV; W+/- mass = 80.326 GeV; Z0 mass = 91.862 GeV; Higgs mass = 145.8 GeV; Higgs VEV = 252.5 GeV; and ratios of force strength constants: (Ggravity)(Mproton)2 = 5 x 10-39 (asssumed); EM fine structure constant = 1/137.03608; Gfermi = (Gweak)(Mproton)2 = 1.02 x 10-5; color force strength = 0.6286 (at 0.245 GeV). With Nonperturbative QCD etc taken into account the color force strength = 0.123 (at 91 GeV). Fermilab (1994) says that Mt = about 170 GeV but I say (1984) that Mt = about 130 GeV. The theoretical Lagrangian is based on the structure of the real Cl(1,7) Clifford algebra which, through 8-fold periodicity, may produce a real Hyperfinite II1 von Neumann Algebra factor.

Frank Smith Jr.

2004-02-12T23:59:59.000Z

140

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents [OSTI]

A nondestructive evaluation technique is disclosed for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, D.C.

1991-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents [OSTI]

A non-destructive evaluation technique for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, David C. (Ames, IA)

1991-04-30T23:59:59.000Z

142

A non-linear elastic constitutive framework for replicating plastic deformation in solids.  

SciTech Connect (OSTI)

Ductile metals and other materials typically deform plastically under large applied loads; a behavior most often modeled using plastic deformation constitutive models. However, it is possible to capture some of the key behaviors of plastic deformation using only the framework for nonlinear elastic mechanics. In this paper, we develop a phenomenological, hysteretic, nonlinear elastic constitutive model that captures many of the features expected of a plastic deformation model. This model is based on calculating a secant modulus directly from a material's stress-strain curve. Scalar stress and strain values are obtained in three dimensions by using the von Mises invariants. Hysteresis is incorporated by tracking an additional history variable and assuming an elastic unloading response. This model is demonstrated in both single- and multi-element simulations under varying strain conditions.

Roberts, Scott Alan; Schunk, Peter Randall

2014-02-01T23:59:59.000Z

143

Growth-optimal investments and numeraire portfolios under transaction costs: An analysis based on the von Neumann-Gale model  

E-Print Network [OSTI]

The aim of this work is to extend the capital growth theory developed by Kelly, Breiman, Cover and others to asset market models with transaction costs. We define a natural generalization of the notion of a numeraire portfolio proposed by Long and show how such portfolios can be used for constructing growth-optimal investment strategies. The analysis is based on the classical von Neumann-Gale model of economic dynamics, a stochastic version of which we use as a framework for the modelling of financial markets with frictions.

Bahsoun, Wael; Taksar, Michael I

2009-01-01T23:59:59.000Z

144

Holographic stress tensor at finite coupling  

E-Print Network [OSTI]

We calculate one, two and three point functions of the holographic stress tensor for any bulk Lagrangian of the form ${\\mathcal{L}}(g^{ab}, R_{abcd}, \

Kallol Sen; Aninda Sinha

2014-11-27T23:59:59.000Z

145

Stress-Strain Model of Unconfined and Confined Concrete and Stress-block Parameters  

E-Print Network [OSTI]

Stress-strain relations for unconfined and confined concrete are proposed to overcome some shortcomings of existing commonly used models. Specifically, existing models are neither easy to invert nor integrate to obtain equivalent rectangular stress...

Murugesan Reddiar, Madhu Karthik

2010-07-14T23:59:59.000Z

146

Die Civil Academy ist ein gemeinsames Programm von BBE und BP Europa SE. Trger und Veranstalter der Civil Academy ist die BBE Geschftsstelle gemeinntzige GmbH.  

E-Print Network [OSTI]

Die Civil Academy ist ein gemeinsames Programm von BBE und BP Europa SE. Träger und Veranstalter der Civil Academy ist die BBE Geschäftsstelle gemeinnützige GmbH. Ausschreibung der 18. Civil Academy Civil Academy ­ Gutes auch gut tun! Du willst mit einer kreativen Idee die Welt zum Besseren verändern

Reyle, Uwe

147

Abbildung 22: Blick auf die HERMES Eisen/Szintillator-Wand zur Identifikation von hoch-energetischenMyonen. Im Zentrum erkenntman einen der beiden HERA-Quadrupole,in die  

E-Print Network [OSTI]

Datensatz aus den Jahren 1996/97 an longitudinal polarisiertem Wasserstoff, einen ex- perimentellen Zugang polarisierten Wasserstoff-Target durchgefĂŒhrt. Mit diesem Target sollen zu einem spĂ€teren Zeit- punkt weitere Analyse auf den Daten der Jahre 1996 und 1997 mit dem polarisier- ten Wasserstoff-Target. Eine Reihe von

148

Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham, A. von Halle, A. F. Carpe, Guy Rossi, K. R. Gilton et al.  

E-Print Network [OSTI]

Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham, A;Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham,a) A. von of the electrodes in an electrostatic accelerator, along with their support structures, might suppress field

Gilson, Erik

149

Bern, 27.10.2014 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 27.10.2014 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t Bern unterstĂŒtzte Forschung NIH-GrantunterstĂŒtzung im Zentralbereich Termine/Dauer AktivitĂ€ten- on & Akkreditierung zusammen mit Program Directors / Principal Investiga- tors und Finanzabtei- lung K. Huber http://grants.nih

Richner, Heinz

150

Bern, 17.11.2014 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 17.11.2014 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitÀt UniversitÀt Bern NIH GrantempfÀnger (grantee) NIH Administration SO: Ch. Leumann, Vizerektor For- schung AOR: diverse Drittmittel-Konto: Finanzabteilung Risikomanagement: U. Zehnder NIH Projektverantwortung PD

Richner, Heinz

151

Bern, 16.11.2011 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 16.11.2011 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t- ment of Categorical Expenditure). Achtung: MWSt / VAT, Zölle, Visa dĂŒrfen nicht mit NIH-Mitteln bezahlt. + 301-402-9123 Excelsheet mit Kategorien NIH analog Statement of Categorical Expenditure: K. Huber wird

Richner, Heinz

152

Bern, 25.02.2011 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 25.02.2011 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t Bern unterstĂŒtzte Forschung NIH-Forschungsprojekte: Gesuch vorbereiten und einreichen 1. National Institutes of Health (NIH) Die National Institutes of Health fördern mit Grants, Vereinbarungen und VertrĂ€gen

Richner, Heinz

153

Bern, 01.10.2009 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 01.10.2009 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t Bern unterstĂŒtzte Forschung NIH-GrantunterstĂŒtzung im Zentralbereich Termine/Dauer AktivitĂ€ten Program Directors / Principal Investiga- tors und Finanzab- teilung K. Huber NIH Grants Policy Statement S

Richner, Heinz

154

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-19(43) Noch mehr Zeichen darstellbar, indem man  

E-Print Network [OSTI]

dezimal gerechnet -- dann meist in BCD-Darstellung (binary coded decimals), d. h. jede Dezimalziffer wird3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-19(43) ­ Noch mehr"), z. B. 0001033016 = (gotischer Buchstabe ,,ahsa") * einige der 16-bit-Codes reserviert, um damit auf

Arndt, Holger

155

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie lautet die Dualdarstellung ( = 2) der Zahl = 3710?  

E-Print Network [OSTI]

. · In kaufmĂ€nnischen Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie Information 3.2 Codes 3-25(48) Praktisch relevante Basen: · = 10 (Dezimaldarstellung) ­ im Alltag ĂŒbliche

Arndt, Holger

156

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-18(43) Unicode: einheitliches Codierungsschema fr alle Zeichen aller Sprachen  

E-Print Network [OSTI]

meist in BCD-Darstellung (binary coded decimals), d. h. jede Dezimalziffer w3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-18(43) · Unicode verschiedene Zeichen (,,Ebene 0"): * 000016­007F16: entsprechen dem 7-bit ASCII-Code * 008016­00FF16

Arndt, Holger

157

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie lautet die Dualdarstellung ( = 2) der Zahl = 3710?  

E-Print Network [OSTI]

Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d. h. jede3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie Information 3.2 Codes 3-25(48) Praktisch relevante Basen: · = 10 (Dezimaldarstellung) ­ im Alltag ĂŒbliche

Arndt, Holger

158

Aggregation Patterns in Stressed Bacteria  

SciTech Connect (OSTI)

We study the formation of spot patterns seen in bacterial colonies when the bacteria are subjected to oxidative stress due to hazardous by-products of respiration. The cell density is coupled to a chemoattractant concentration as well as to nutrient and waste fields. The model combines the propagation of a front of motile bacterial radially outward from an initial site, a Turing instability of the uniformly dense state, and a reduction of motility for cells sufficiently far behind the front. The wide variety of patterns seen in the experiments is reproduced by the model by varying the details of the initiation of the chemoattractant emission as well as the transition to a nonmotile phase.

Tsimring, L.; Levine, H. [Institute for Nonlinear Science, University of California at San Diego, La Jolla, California 92093-0402 (United States)] [Institute for Nonlinear Science, University of California at San Diego, La Jolla, California 92093-0402 (United States); Aranson, I. [Deptartment of Physics, Bar-Ilan University, Ramat Gan (Israel)] [Deptartment of Physics, Bar-Ilan University, Ramat Gan (Israel); Ben-Jacob, E.; Cohen, I.; Shochet, O. [School of Physics and Astronomy, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978 (Israel)] [School of Physics and Astronomy, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978 (Israel); Reynolds, W.N. [Complex Systems Division, Los Alamos National Laboratory, Los Alamos New Mexico (United States)] [Complex Systems Division, Los Alamos National Laboratory, Los Alamos New Mexico (United States)

1995-08-28T23:59:59.000Z

159

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects.

Maris, Humphrey J. (Barrington, RI); Stoner, Robert J (Duxbury, MA)

2001-01-01T23:59:59.000Z

160

Stress corrosion cracking under low stress: Continuous or discontinuous Longkui K. Zhu a  

E-Print Network [OSTI]

Stress corrosion cracking under low stress: Continuous or discontinuous cracks? Longkui K. Zhu a , Yu Yan a , Jinxu X. Li a , Lijie J. Qiao a, , Alex A. Volinsky b,a a Corrosion and Protection Center. Stress corrosion C. Anodic dissolution a b s t r a c t Two-dimensional and three-dimensional crack

Volinsky, Alex A.

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

MANAGING JOB LOSS and FINANCIAL STRESS  

E-Print Network [OSTI]

-hunting strategy. Put time and energy into planning actions that will lead to your next job such as preparingMANAGING JOB LOSS and FINANCIAL STRESS a Personal and Family Guide CENTER ON THE FAMILY #12;2 Managing Job Loss and Financial Stress The issues associated with losing one's job or having hours cut

162

Residual stress patterns in steel welds  

SciTech Connect (OSTI)

Neutron strain scanning of residual stress is a valuable nondestructive tool for evaluation of residual stress in welds. The penetrating characteristic of neutrons permits mapping of strain patterns with a spatial resolution approaching 1mm at depths of 20mm in steels. While the overall patterns of the residual stress tensor in a weld are understood, the detailed patterns depend on welding process parameters and the effects of solid state transformation. The residual strain profiles in two multi-pass austenitic welds and a ferritic steel weld are presented. The stress-free lattice parameters within the fusion zone and the adjacent heat affected zone in the two austenitic welds show that the interpretation of residual stress from strains are affected by welding parameters. An interpretation of the residual strain pattern in the ferritic steel plate can be made using the strain measurements of a Gleeble test bar which has undergone the solid state austenite decomposition.

Spooner, S.; Hubbard, C.R.; Wang, X.L.; David, S.A.; Holden, T.M. [Oak Ridge National Lab., TN (United States); Root, J.H.; Swainson, I. [Atomic Energy of Canada Ltd., Chalk River, ON (Canada)

1994-12-31T23:59:59.000Z

163

Modeling of stresses at grain boundaries with respect to occurrence of stress corrosion cracking  

SciTech Connect (OSTI)

The distributions of elastic stresses/strains in the grain boundary regions were studied by the analytical and the finite element models. The grain boundaries represent the sites where stress concentration occurs as a result of discontinuity of elastic properties across the grain boundary and the presence of second phase particles elastically different from the surrounding matrix grains. A quantitative analysis of those stresses for steels and nickel based alloys showed that the stress concentrations in the grain boundary regions are high enough to cause a local microplastic deformation even when the material is in the macroscopic elastic regime. The stress redistribution as a result of such a plastic deformation was discussed.

Kozaczek, K.J. [Oak Ridge National Lab., TN (United States); Sinharoy, A.; Ruud, C.O. [Pennsylvania State Univ., University Park, PA (United States); McIlree, A.R. [Electric Power Research Institute, Palo Alto, CA (United States)

1995-12-31T23:59:59.000Z

164

E-Print Network 3.0 - acute stress increases Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

yourself, which further increases stress. Whenfeelingstressedout... MD6151-8-10 Murdoch Counselling Service Stress management What is stress? Stress is the way your... body...

165

Structure, tectonics and stress field of the Coso Range, Inyo...  

Open Energy Info (EERE)

been produced by the regional stress field rather than to have been of volcanogenic origin. Focal mechanisms of small-magnitude earthquakes support the stress directions...

166

DOE Cell Component Accelerated Stress Test Protocols for PEM...  

Broader source: Energy.gov (indexed) [DOE]

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells DOE Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells This document describes test protocols...

167

Membrane Stresses Induced by Overproduction of Free Fatty Acids...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Membrane Stresses Induced by Overproduction of Free Fatty Acids in Escherichia coli. Membrane Stresses Induced by Overproduction of Free Fatty Acids in Escherichia coli. Abstract:...

168

SciTech Connect: Relationship between critical tensile stress...  

Office of Scientific and Technical Information (OSTI)

Relationship between critical tensile stress and fracture toughness in mild steel Citation Details In-Document Search Title: Relationship between critical tensile stress and...

169

The Role of Geochemistry and Stress on Fracture Development and...  

Broader source: Energy.gov (indexed) [DOE]

The Role of Geochemistry and Stress on Fracture Development and Proppant Behavior in EGS Reservoirs The Role of Geochemistry and Stress on Fracture Development and Proppant...

170

Polarization Losses under Accelerated Stress Test Using Multiwalled...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Accelerated Stress Test Using Multiwalled Carbon Nanotube Supported Pt Catalyst in PEM Fuel Cells. Polarization Losses under Accelerated Stress Test Using Multiwalled Carbon...

171

Der Briefwechsel zwischen Sidonie Na?dherny? und Albert Bloch : September 1947-September 1950 : mit einer Einfu?hrung in die Widmungsgedichte von Karl Kraus an Sidonie Na?dherny?  

E-Print Network [OSTI]

Die Aufgabe dieser Arbeit besteht darin, Sidonie Na?dherny? Einfluß auf das Werk von Karl Kraus, vor allem auf seine Lyrik, an Hand der Albert Bloch/Sidonie Na?dherny?-Korrespondenz auszuwerten. Neben den eigentlichen ...

Champion, Elke Lorenz

1998-01-01T23:59:59.000Z

172

Stress corrosion crack growth in porous sandstones.   

E-Print Network [OSTI]

Stress corrosion crack growth occurs when the chemical weakening of strained crack tip bonds facilitates crack propagation. I have examined the effect of chemical processes on the growth of a creack population by carrying out triaxial compression...

Ojala, Ira O

173

Residual stress in nanocrystalline nickel tungsten electrodeposits  

E-Print Network [OSTI]

Characterizing the residual stress of thick nanocrystalline electrodeposits poses several unique challenges due to their fine grain structure, thickness distribution, and matte surface. We employ a three-dimensional ...

Ziebell, Tiffany D. (Tiffany Dawn)

2011-01-01T23:59:59.000Z

174

Capacitive Stress Gauges in Model Dipole Magnets  

E-Print Network [OSTI]

Capacitive transducers are used to measure mechanical stress in the windings of superconducting magnets. The transducer consists of a bonded laminate of alternating thin foils of stainless steel and high-strength polymer (polyimide). The thin...

Ragland, R. Blake

2009-06-09T23:59:59.000Z

175

Experimental Verification of Solidification Stress Theory  

SciTech Connect (OSTI)

A research program is being conducted to develop a crack-free ceramic waste form (CWF) to be used for long term encasement of fission products and actinides resulting from processing spent nuclear fuel. Cracking usually occurs in the cooldown phase of the glass or ceramic formations. A crack-free formation should have more resistance to leaching than one with many cracks. In the research leading up to producing a CWF, a model was developed that proposes a permanent stress develops when the melt solidifies and that this stress can cause failure as the CWF nears room temperature. This paper reports on how the formation, CWF2, confirms the existence of this stress. The solidification stress is in addition to and of opposite sign of the thermal stress. Its derivation is reported on in Ref. 1. Cracking of the CWF would occur at low temperatures if solidification stress exists but at high temperatures if it doesn’t. If solidification stress occurs, then the cooldown rate during solidification should be reduced. If not, it should be reduced when the thermal stresses are highest. Recording cracking sounds confirm the existence of this solidification stress since cracking occurred during the low temperature phase of the cooldown. As a side purpose of this paper, a cooldown rate is proposed that should eliminate cracking in the next experiment, CWF3. CWF2 is a prototype vertical ceramic waste cylinder formed over a period of 10 days by heating a mixture of 75% zeolite, 25% glass frit in an argon atmosphere furnace through melting to 925 C and then cooling through solidification to room temperature. It is approximately 1 m high, 0.5 m in diameter, weighs about 400 kg, and is formed in a stainless steel can 0.5 cm thick. This cylinder developed many cracks on cooldown. At least 15 loud cracks were recorded over a period of 4 days at the end of cooldown when the temperatures were below 400 C. The CWF2 surface and centerline temperatures at mid height were measured which allowed the stress to be calculated. The timing of the cracks was compared to the time the calculated total stress exceeded the tensile stress limit and verified that the cause of the cracking was solidification stress and not thermal stress. Since the CWF is encased in a can in a furnace, the cracks cannot be easily observed but can be detected with sound measurements. Similarly, the stress cannot be measured but only estimated with analysis. Destructive examination of the CWF after cooldown was used to determine the pattern of the cracking which appeared to be initiated mainly in the inner region which is evidence the cracking is due to solidification stress.

C.W. Solbrig; M.C. Morrison; M.F. SImpson; K.J. Bateman

2012-04-01T23:59:59.000Z

176

STRESS MEASUREMENTS IN THE STRIPA GRANITE  

E-Print Network [OSTI]

get a ance in the Stripa granite disturo the stress field.tensor in the Stripa granite is to do more measurements atPermeability Test of the Granite in the Stripa Mine and

Carlsson, H.

2011-01-01T23:59:59.000Z

177

Potential oxidative stress due to Pb exposure  

E-Print Network [OSTI]

The hazards of Pb exposure has been a topic of concern for many years. This research was developed to investigate the possibility of Pb induced oxidative stress. The research objectives were to observe Pb induced lipid peroxidation and Pb induced...

Elms, Rene' Davina

2013-02-22T23:59:59.000Z

178

Critical stress for stress corrosion cracking of duplex stainless steel in sour environments  

SciTech Connect (OSTI)

The critical stress for initiation of stress corrosion cracking (SCC) of a duplex stainless steel (DSS) in a sour environment was investigated using three stress application techniques: constant-strain, constant-load, and slow strain rate testing (SSRT). The critical stresses for SCC initiation as determined by detailed observation of the alloy surface after the three tests were in good agreement when a newly proposed index was adopted to express the SSRT results combined with crack observations for each test. The effect of cold work (CW) on SCC and pitting resistance of the DSS also was studied. CW did not accelerate SCC when initiation was controlled by pitting. The critical stress for SCC initiation increased with increasing CW and the resultant increase in yield stress.

Miyasaka, A.; Kanamaru, T. [Nippon Steel Corp., Tokai, Aichi (Japan). Nagoya Research and Development Labs.; Ogawa, H. [Nippon Steel Corp., Futtsu, Chiba (Japan). Steel Research Labs.

1996-08-01T23:59:59.000Z

179

Sequential water stress in cotton: yield response to stress in early and peak flowering stages  

E-Print Network [OSTI]

(PL4), where S = (P1, 4 + 600)/-2400. Table 44. Treatment summary of stress factors (S) based on dawn leaf water potentials (~), where S = (Pl, d + 600)/-2400 . . Table 45. Stress factors (S) based on noon leaf water potentials (~), where S = (Pt, o... + 600)/-2400. . . . . 174 . . . . . 176 . . . . . 178 . . . . . 179 Table 46. Treatment summary of stress factors (S) based on noon leaf water potentials (Pt, o), where S = (~ + 600)/- 2400. Table 47. SD factors using 2*(0. 5-AVWCON...

Prochaska, James Frank

1991-01-01T23:59:59.000Z

180

Bern, 08.03.2012 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 08.03.2012 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t.huber@uls.unibe.ch) Drittmittelkonto: Finanzabteilung: Ansprechpersonen fĂŒr die FakultĂ€ten UniversitĂ€t Bern NIH GrantempfĂ€nger (grantee) NIH Administration SO: D. Odermatt, VD/UL AOR: diverse E-BIZ POC: K. Huber Drittmittel

Richner, Heinz

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Bern, 01.10.2009 Von den US-amerikanischen National Institutes of Health (NIH) an der Universitt Bern untersttzte Forschung  

E-Print Network [OSTI]

Bern, 01.10.2009 1 Von den US-amerikanischen National Institutes of Health (NIH) an der UniversitĂ€t Bern unterstĂŒtzte Forschung Audit Prozess fĂŒr NIH-Grants an der UniversitĂ€t Bern Termine NIH-Grants an der Uni- versitĂ€t Bern durchzufĂŒhren. Ist die Summe geringer, muss kein Audit durchge

Richner, Heinz

182

Discrimination of plant stress caused by oil pollution and waterlogging  

E-Print Network [OSTI]

; thermography; oil pollution; waterlogging; plant stress. Paper 13215 received Jun. 19, 2013; revised manuscript

Blackburn, Alan

183

Review article Consequences of environmental stress on oak  

E-Print Network [OSTI]

Review article Consequences of environmental stress on oak: predisposition to pathogens PM Wargo also can act as a predisposing stress. Stress causes physical, physiological, and chemical changes mortalité. dépérissement / stress / pathogÚnes secondaires / Quercus INTRODUCTION Decline diseases of trees

Paris-Sud XI, Université de

184

Yield stress and elastic modulus of suspensions of noncolloidal particles in yield stress fluids  

E-Print Network [OSTI]

this yield stress; above the yield stress they behave as liquids, and their flow behavior is usually well more complex at the approach of the transition between the liquid and the solid regimes [Coussot (2005 and Jorrot (2001)], a cement paste [Geiker et al. (2002)], a foam [Cohen-Addad et al. (2007)] or coal

Paris-Sud XI, Université de

185

Internal Stress in a Model Elasto-Plastic Fluid  

E-Print Network [OSTI]

Plastic materials can carry memory of past mechanical treatment in the form of internal stress. We introduce a natural definition of the vorticity of internal stress in a simple two-dimensional model of elasto-plastic fluids, which generates the internal stress. We demonstrate how the internal stress is induced under external loading, and how the presence of the internal stress modifies the plastic behavior.

Takeshi Ooshida; Ken Sekimoto

2005-12-03T23:59:59.000Z

186

Yield Stress Materials in Soft Condensed Matter  

E-Print Network [OSTI]

We present a comprehensive review of the physical behavior of yield stress materials in soft condensed matter, which encompasses a broad range of soft materials from colloidal assemblies and gels to emulsions and non-Brownian suspensions. All these disordered materials display a nonlinear response to an external mechanical forcing, which results from the existence of a finite force threshold for flow to occur, the yield stress. We discuss both the physical origin and the rheological consequences associated with this nonlinear behavior. We give an overview of the different experimental techniques developed to measure the yield stress. We discuss extensively the recent progress concerning a microscopic description of the flow dynamics of yield stress materials, emphasizing in particular the role played by relaxation timescales, the interplay between shear flow and aging behavior, the existence of inhomogeneous shear flows and shear bands, wall slip, and non-local effects in confined geometries. We finally review the status of modeling of the shear rheology of yield stress materials in the framework of continuum mechanics.

Daniel Bonn; Jose Paredes; Morton M. Denn; Ludovic Berthier; Thibaut Divoux; Sébastien Manneville

2015-02-18T23:59:59.000Z

187

A High shear stress segment along the San Andreas Fault: Inferences based on near-field stress direction and stress magnitude observations in the Carrizo Plain Area  

SciTech Connect (OSTI)

Nearly 200 new in-situ determinations of stress directions and stress magnitudes near the Carrizo plain segment of the San Andreas fault indicate a marked change in stress state occurring within 20 km of this principal transform plate boundary. A natural consequence of this stress transition is that if the observed near-field ``fault-oblique`` stress directions are representative of the fault stress state, the Mohr-Coulomb shear stresses resolved on San Andreas sub-parallel planes are substantially greater than previously inferred based on fault-normal compression. Although the directional stress data and near-hydrostatic pore pressures, which exist within 15 km of the fault, support a high shear stress environment near the fault, appealing to elevated pore pressures in the fault zone (Byerlee-Rice Model) merely enhances the likelihood of shear failure. These near-field stress observations raise important questions regarding what previous stress observations have actually been measuring. The ``fault-normal`` stress direction measured out to 70 km from the fault can be interpreted as representing a comparable depth average shear strength of the principal plate boundary. Stress measurements closer to the fault reflect a shallower depth-average representation of the fault zone shear strength. If this is true, only stress observations at fault distances comparable to the seismogenic depth will be representative of the fault zone shear strength. This is consistent with results from dislocation monitoring where there is pronounced shear stress accumulation out to 20 km of the fault as a result of aseismic slip within the lower crust loading the upper locked section. Beyond about 20 km, the shear stress resolved on San Andreas fault-parallel planes becomes negligible. 65 refs., 15 figs.

Castillo, D. A., [Department of Geology and Geophysics, University of Adelaide (Australia); Younker, L.W. [Lawrence Livermore National Lab., CA (United States)

1997-01-30T23:59:59.000Z

188

Ageing of Natural Rubber under Stress  

E-Print Network [OSTI]

We report a dynamical-mechanical study of stress relaxation at small deformation in a natural (polyisoprene) rubber well above its glass transition temperature Tg. We find that an almost complete relaxation of stress takes place over very long periods of time, even though the elastic network integrity is fully retained. The relaxation rate and the long-time equilibrium modulus are sensitive functions of temperature which do not follow time-temperature superposition. Many characteristic features of non-ergodic ageing response are apparent at both short and very long times. We interpret the observed behaviour in terms of the properties of rubber crosslinks, capable of isomerisation under stress, and relate the results to recent models of soft glassy rheology.

S. M. Clarke; F. Elias; E. M. Terentjev

2000-05-04T23:59:59.000Z

189

Assessment of Wall Shear Stress Changes in Arteries and Veins of Arteriovenous Polytetrafluoroethylene Grafts Using Magnetic Resonance Imaging  

SciTech Connect (OSTI)

The purpose of the study was to determine simultaneously the temporal changes in luminal vessel area, blood flow, and wall shear stress (WSS) in both the anastomosed artery (AA) and vein (AV) of arteriovenous polytetrafluoroethylene (PTFE) grafts. PTFE grafts were placed from the iliac artery to the ipsilateral iliac vein in 12 castrated juvenile male pigs. Contrast-enhanced magnetic resonance angiograpgy with cine phase-contrast magnetic resonance imaging was performed. Luminal vessel area, blood flow, and WSS in the aorta, AA, AV, and inferior vena cava were determined at 3 days (D3), 7 days (D7), and 14 days (D14) after graft placement. Elastin von Gieson staining of the AV was performed. The average WSS of the AA was highest at D3 and then decreased by D7 and D14. In contrast, the average WSS and intima-to-media ratio of the AV increased from D3 to D7 and peaked by D14. Similarly, the average area of the AA was highest by D7 and began to approximate the control artery by D14. The average area of the AV had decreased to its lowest by D7. High blood flows through the AA causes a decrease in average WSS and increase in the average luminal vessel area, whereas at the AV, the average WSS and intima-to-media ratio both increase while the average luminal vessel area decreases.

Misra, Sanjay, E-mail: Misra.sanjay@mayo.edu; Woodrum, David A. [Mayo Clinic, Department of Radiology (United States); Homburger, Jay [Medical College of Georgia, Department of Vascular Surgery (United States); Elkouri, Stephane [Centre Hospitalier de I'Universite de Montreal, Department of Vascular Surgery (Canada); Mandrekar, Jayawant N. [Mayo Clinic, Division of Biostatistics (United States); Barocas, Victor [University of Minnesota, Department of Biomedical Engineering (United States); Glockner, James F. [Mayo Clinic, Department of Radiology (United States); Rajan, Dheeraj K. [Toronto General Hospital, University Health Network, Department of Medical Imaging, Division of Vascular and Interventional Radiology (Canada); Mukhopadhyay, Debabrata [Mayo Clinic, Department of Biochemistry and Molecular Biology (United States)

2006-08-15T23:59:59.000Z

190

Stress- and Chemistry-Mediated Permeability Enhancement/Degradation in Stimulated Critically-Stressed Fractures  

SciTech Connect (OSTI)

This work has investigated the interactions between stress and chemistry in controlling the evolution of permeability in stimulated fractured reservoirs through an integrated program of experimentation and modeling. Flow-through experiments on natural and artificial fractures in Coso diorite have examined the evolution of permeability under paths of mean and deviatoric stresses, including the role of dissolution and precipitation. Models accommodating these behaviors have examined the importance of incorporating the complex couplings between stress and chemistry in examining the evolution of permeability in EGS reservoirs. This document reports the findings of experiment [1,2] and analysis [3,4], in four sequential chapters.

Derek Elsworth; Abraham S. Grader; Chris Marone; Phillip Halleck; Peter Rose; Igor Faoro; Joshua Taron; André Niemeijer; Hideaki Yasuhara

2009-03-30T23:59:59.000Z

191

Particle creation from the quantum stress tensor  

E-Print Network [OSTI]

Among the different methods to derive particle creation, finding the quantum stress tensor expectation value gives a covariant quantity which can be used for examining the back-reaction issue. However this tensor also includes vacuum polarization in a way that depends on the vacuum chosen. Here we review different aspects of particle creation by looking at energy conservation and at the quantum stress tensor. It will be shown that in the case of general spherically symmetric black holes that have a \\emph{dynamical horizon}, as occurs in a cosmological context, one cannot have pair creation on the horizon because this violates energy conservation. This confirms the results obtained in other ways in a previous paper [25]. Looking at the expectation value of the quantum stress tensor with three different definitions of the vacuum state, we study the nature of particle creation and vacuum polarization in black hole and cosmological models, and the associated stress energy tensors. We show that the thermal tempera...

Firouzjaee, Javad T

2015-01-01T23:59:59.000Z

192

Dynamic response of Cu4Zr54 metallic glass to high strain rate shock loading: plasticity, spall and atomic-level structures  

SciTech Connect (OSTI)

We investigate dynamic response of Cu{sub 46}Zr{sub 54} metallic glass under adiabatic planar shock wave loading (one-dimensional strain) wjth molecular dynamics simulations, including Hugoniot (shock) states, shock-induced plasticity and spallation. The Hugoniot states are obtained up to 60 CPa along with the von Mises shear flow strengths, and the dynamic spall strength, at different strain rates and temperatures. The spall strengths likely represent the limiting values achievable in experiments such as laser ablation. For the steady shock states, a clear elastic-plastic transition is identified (e.g., in the shock velocity-particle velocity curve), and the shear strength shows strain-softening. However, the elastic-plastic transition across the shock front displays transient stress overshoot (hardening) above the Hugoniot elastic limit followed by a relatively sluggish relaxation to the steady shock state, and the plastic shock front steepens with increasing shock strength. The local von Mises shear strain analysis is used to characterize local deformation, and the Voronoi tessellation analysis, the corresponding short-range structures at various stages of shock, release, tension and spallation. The plasticity in this glass is manifested as localized shear transformation zones and of local structure rather than thermal origin, and void nucleation occurs preferentially at the highly shear-deformed regions. The Voronoi and shear strain analyses show that the atoms with different local structures are of different shear resistances that lead to shear localization (e.g., the atoms indexed with (0,0,12,0) are most shear-resistant, and those with (0,2,8,1) are highly prone to shear flow). The dynamic changes in local structures are consistent with the observed deformation dynamics.

Luo, Shengnian [Los Alamos National Laboratory; Arman, Bedri [Los Alamos National Laboratory; Germann, Timothy C [Los Alamos National Laboratory; Cagin, Tahir [TEXAS A& M UNIV

2009-01-01T23:59:59.000Z

193

Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell  

E-Print Network [OSTI]

Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell deformation, SCEC velocities, crustal stress Citation: Smith, B., and D. Sandwell, Coulomb stress accumulation

Smith-Konter, Bridget

194

Grain Boundary Structure Effects on Intergranular Stress Corrosion Cracking of  

E-Print Network [OSTI]

Grain Boundary Structure Effects on Intergranular Stress Corrosion Cracking of Alloy X­750 Y. Pan B­of­freedom) and correlations with intergranular stress corrosion cracking observed in Alloy X­750. Orientation imaging

Olson, Tamara

195

Stress Evaluation and Model Validation Using Laser Ultrasonics  

SciTech Connect (OSTI)

Rayleigh surface waves can be used to evaluate surface stresses and through-thickness stress gradients based on acoustoelasticity. Laser based ultrasonic techniques, which generate and detect surface waves, have the advantages of good spatial resolution and remote operation. The techniques have many potential applications. This is the final report of a LDRD project that is the first to exploit the benefits of laser ultrasonics for stress and stress gradient evaluation.

Dike, Jay J.; Lu, Wei-yang; Peng, Lawrence W.; Wang, James C. F.

1999-02-01T23:59:59.000Z

196

au lhc mise: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: The Standard Model of particle physics predicts the existence of the Higgs boson, which preferentially decays to b quark pairs at low mass. The identification of...

197

Liste complte des publications: (Mise jour: Sept 2013)  

E-Print Network [OSTI]

Projections. in Regional Assessment of Climate Change in the Mediterranean (Eds. A. Navarra, L. Tubiana weather regimes over the Mediterranean region: their role for the regional climate and projected changes. Marcomini, 2013: An ensemble of models for identifying climate change scenarios in the Gulf of Gabes

Madeleine, Jean-Baptiste

198

RESIDUAL STRESS AND YOUNG'S MODULUS MEASUREMENT OF CAPACITIVE MICROMACHINED ULTRASONIC  

E-Print Network [OSTI]

deposition technique yields residual stress of around 100 MPa and Young's modulus of around 300 GPa. Keywords's modulus, Poisson's ratio, and residual stress of the deposited thin films. In this paper, we propose a newRESIDUAL STRESS AND YOUNG'S MODULUS MEASUREMENT OF CAPACITIVE MICROMACHINED ULTRASONIC TRANSDUCER

Khuri-Yakub, Butrus T. "Pierre"

199

SUPERLAYER RESIDUAL STRESS EFFECT ON THE INDENTATION ADHESION MEASUREMENTS  

E-Print Network [OSTI]

as a function of film thickness and residual stress. These films were sputter deposited onto thermally oxidized deposition parameters were controlled to produce either a compressive residual stress of 1 GPa or a tensile in a study of compressive and tensile residual stresses created during sputter deposition of tungsten

Volinsky, Alex A.

200

TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS  

E-Print Network [OSTI]

TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS By Hyoseop Woo,1 Associate Member are the beginning of motion of sediment particles and sediment transport in alluvial channels. If shear stress can be well defined in clear-water flows, compar- atively little is known about shear stresses in sediment

Julien, Pierre Y.

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Welding residual stresses in ferritic power plant steels  

E-Print Network [OSTI]

REVIEW Welding residual stresses in ferritic power plant steels J. A. Francis*1 , H. K. D. H require therefore, an accounting of residual stresses, which often are introduced during welding. To do in the estimation of welding residual stresses in austenitic stainless steels. The progress has been less convincing

Cambridge, University of

202

Original article A study on growth stresses, tension wood  

E-Print Network [OSTI]

Original article A study on growth stresses, tension wood distribution and other related wood variations of wood structure (specific gravity and pulp yield), and the transverse mechanical resistance of wood. To investigate growth stresses, longitudinal displacements after stress release were estimated

Paris-Sud XI, Université de

203

Method For Characterizing Residual Stress In Metals  

DOE Patents [OSTI]

A method is provided for measuring the residual stress in metals. The method includes the steps of drilling one or more holes in a metal workpiece to a preselected depth and mounting one or more acoustic sensors on the metal workpiece and connecting the sensors to an electronic detecting and recording device. A liquid metal capable of penetrating into the metal workpiece placed at the bottom of the hole or holes. A recording is made over a period of time (typically within about two hours) of the magnitude and number of noise events which occur as the liquid metal penetrates into the metal workpiece. The magnitude and number of noise events are then correlated to the internal stress in the region of the workpiece at the bottom of the hole.

Jacobson, Loren A. (Santa Fe, NM); Michel, David J. (Alexandria, VA); Wyatt, Jeffrey R. (Burke, VA)

2002-12-03T23:59:59.000Z

204

Entanglement entropy from the holographic stress tensor  

E-Print Network [OSTI]

We consider entanglement entropy in the context of gauge/gravity duality for conformal field theories in even dimensions. The holographic prescription due to Ryu and Takayanagi (RT) leads to an equation describing how the entangling surface extends into the bulk geometry. We show that setting to zero the time-time component of the Brown-York stress tensor evaluated on the co-dimension one entangling surface, leads to the same equation. By considering a spherical entangling surface as an example, we observe that Euclidean action methods in AdS/CFT will lead to the RT area functional arising as a counterterm needed to regularize the stress tensor. We present arguments leading to a justification for the minimal area prescription.

Arpan Bhattacharyya; Aninda Sinha

2013-10-15T23:59:59.000Z

205

Critical shear stresses in cohesive soils  

E-Print Network [OSTI]

CRITICAL SHEAR STRESSES IN COHESIVE SOILS A Thesis By ROBERT JAMES REKTORIK Approved as to style and content by: (Committee hairm g- c& ( ead of epartm ( mber) (Member) January 1964 ACKNOWLEDGMENTS I wish to acknowledge the guidance..., and Dummy Soil Sample 17 Typical Soil Samples after Scour Test, San Saba Clay 25 Typical Soil Samples after Scour Test, Houston Black Clay, K177 Regression of Critical Shearing Force on Per Cent Moisture . 31 10. Regression of Critical Shearing Force...

Rektorik, Robert James

1964-01-01T23:59:59.000Z

206

Method and apparatus for measuring stress  

DOE Patents [OSTI]

A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.

Thompson, R.B.

1983-07-28T23:59:59.000Z

207

Grading of lumber using stress waves  

E-Print Network [OSTI]

of 2, 500 psi/min was used for all the tension tests, resulting in an average ume to failure of approximately 2 minutes. The section to follow presents an analysis of these experimental results. 40 CHAPTER IV ANALYSIS AND DISCUSSION MISCELLANEOUS... gravity and MOEs grouped by grade. Grade Sample Size Specifice Gravity Averageee Static Bending MOE (10' psi) Conjugate++e MOE (10 psi) Transverse Long Span Vibration MOE Bending MOE (10' psi) (10' psi) fmpact Stress Wave MOE (10 psi) 302...

Bethi, Rajeshwar

1994-01-01T23:59:59.000Z

208

Method and apparatus for measuring stress  

DOE Patents [OSTI]

A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.

Thompson, R. Bruce (Ames, IA)

1985-06-11T23:59:59.000Z

209

Over Core Stress | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County, Vermont:Ottawa County,Otter LakeOutagamieStress

210

Municipal solid waste effective stress analysis  

SciTech Connect (OSTI)

The mechanical behavior of municipal solid waste (MSW) has attracted the attention of many researchers in the field of geo-environmental engineering in recent years and several aspects of waste mechanical response under loading have been elucidated. However, the mechanical response of MSW materials under undrained conditions has not been described in detail to date. The knowledge of this aspect of the MSW mechanical response is very important in cases involving MSW with high water contents, seismic ground motion and in regions where landfills are built with poor operation conditions. This paper presents the results obtained from 26 large triaxial tests performed both in drained and undrained conditions. The results were analyzed taking into account the waste particles compressibility and the deformation anisotropy of the waste samples. The waste particles compressibility was used to modify the Terzaghi effective stress equation, using the Skempton (1961) proposition. It is shown that the use of the modified effective stress equation led to much more compatible shear strength values when comparing Consolidated-Drained (CD) and Consolidated-Undrained (CU), results, explaining the high shear strength values obtained in CU triaxial tests, even when the pore pressure is almost equal to the confining stress.

Shariatmadari, Nader, E-mail: shariatmadari@iust.ac.i [Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, 16846-13114 Teharn (Iran, Islamic Republic of); Machado, Sandro Lemos, E-mail: smachado@ufba.b [Dept. of Materials Science and Technology, Federal University of Bahia, 02 Aristides Novis St., 40210-630 Salvador-BA (Brazil); Noorzad, Ali, E-mail: noorzad@pwut.ac.i [Faculty of Water Engineering, Power and Water University of Technology, Tehranpars, 1719-16765 Tehran (Iran, Islamic Republic of); Karimpour-Fard, Mehran, E-mail: karimpour_mehran@iust.ac.i [Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, 16846-13114 Teharn (Iran, Islamic Republic of)

2009-12-15T23:59:59.000Z

211

Thin Silicon MEMS Contact-Stress Sensor  

SciTech Connect (OSTI)

This work offers the first, thin, MEMS contact-stress (CS) sensor capable of accurate in situ measruement of time-varying, contact-stress between two solid interfaces (e.g. in vivo cartilage contact-stress and body armor dynamic loading). This CS sensor is a silicon-based device with a load sensitive diaphragm. The diaphragm is doped to create piezoresistors arranged in a full Wheatstone bridge. The sensor is similar in performance to established silicon pressure sensors, but it is reliably produced to a thickness of 65 {micro}m. Unlike commercial devices or other research efforts, this CS sensor, including packaging, is extremely thin (< 150 {micro}m fully packaged) so that it can be unobtrusively placed between contacting structures. It is built from elastic, well-characterized materials, providing accurate and high-speed (50+ kHz) measurements over a potential embedded lifetime of decades. This work explored sensor designs for an interface load range of 0-2 MPa; however, the CS sensor has a flexible design architecture to measure a wide variety of interface load ranges.

Kotovsky, J; Tooker, A; Horsley, D A

2009-12-07T23:59:59.000Z

212

Models of Stochastic, Spatially Varying Stress in the Crust Compatible with Focal-Mechanism Data, and How Stress Inversions  

E-Print Network [OSTI]

Models of Stochastic, Spatially Varying Stress in the Crust Compatible with Focal-Mechanism Data. Heaton Abstract Evidence suggests that slip in earthquakes and the resultant stress changes are spatially heterogeneous. If crustal stress from past earthquakes is spatially hetero- geneous, then earthquake focal

Greer, Julia R.

213

and oxidative stress in T lymphocytes Enhanced susceptibility of T lymphocytes to oxidative stress in the absence  

E-Print Network [OSTI]

stress in the absence of the cellular prion protein. Catherine Aude-Garcia a, b, c, * , Christian that in mice fed with a restricted diet, a regimen known to increase the intracellular level of ROS, Pr oxidative stress. Key words: cellular prion protein T Lymphocytes oxidative stress redox balance thymus hal

Boyer, Edmond

214

Stress State of the Earth's Crust in Azerbaijan  

SciTech Connect (OSTI)

The study of the crustal stress has a practical implication in hazard mitigation. Knowledge on stress-related ground motion may help to improve the stability of public and private buildings. The stress state of the crust in Azerbaijan is studied in this paper by means of focal mechanism analysis and using different methods to determine the principal stress orientations. Two types of stress states were revealed in the studied regions. The territory of Great and Lesser Caucasus and Talysh folded zone are characterized by near-horizontal compression. The territories of Caspian Sea and Kura depression are characterized by near-horizontal tension. For both types of stress state, the predominant stress axes are oriented perpendicular to the regional geological structures.

Agayeva, Solmaz T. [Geology Institute, Azerbaijan National Academy of Sciences, 29A, H. Javid Ave., Baku 1143 (Azerbaijan)

2006-03-23T23:59:59.000Z

215

Residual stresses in dielectrics caused by metallization lines and pads  

SciTech Connect (OSTI)

Residual stresses in dielectrics and semiconductors induced by metal lines, pads and vias can have detrimental effects on the performance of devices and electronic packages. Analytical and numerical calculations of these stresses have been performed for two purposes. (1) To illustrate how these stresses relate to the residual stress in the metallization and its geometry; (2) to calibrate a piezo-spectroscopic method for measuring these stresses with high spatial resolution. The results of the calculations have been presented using non-dimensional parameters that both facilitate scaling and provide connections to the stresses in the metal, with or without yielding. Preliminary experimental results obtained for Au/Ge eutectic pads illustrate the potential of the method and the role of the stress analysis.

He, M.Y.; Lipkin, J.; Clarke, D.R. [Univ. of California, Santa Barbara, CA (United States). Materials Dept.] [Univ. of California, Santa Barbara, CA (United States). Materials Dept.; Evans, A.G. [Harvard Univ., Cambridge, MA (United States). Div. of Applied Sciences] [Harvard Univ., Cambridge, MA (United States). Div. of Applied Sciences; Tenhover, M. [Carborundum Co., Niagara Falls, NY (United States)] [Carborundum Co., Niagara Falls, NY (United States)

1996-06-01T23:59:59.000Z

216

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Atrazhev, Vadim V; Dmitriev, Dmitry V; Erikhman, Nikolay S; Sultanov, Vadim I; Patterson, Timothy; Burlatsky, Sergei F

2014-01-01T23:59:59.000Z

217

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Vadim V. Atrazhev; Tatiana Yu. Astakhova; Dmitry V. Dmitriev; Nikolay S. Erikhman; Vadim I. Sultanov; Timothy Patterson; Sergei F. Burlatsky

2014-01-17T23:59:59.000Z

218

Environmental Stress and The Expression of Inbreeding Depression in Drosophila melanogaster  

E-Print Network [OSTI]

high competition conditions, and male mating success (Tablesuccess under benign and stressful conditions………………………………………………………………..success after exposure to stressful conditions……………………..

Enders, Laramy Sherian

2010-01-01T23:59:59.000Z

219

Stammzelltransplantation: Vorhersage von Komplikationen  

E-Print Network [OSTI]

Kapilarelektorphorese ESI-TOF Kaiser et al., Electrophoresis 2004 #12;ANALYSE: A ROHDATEN: B peak list: C Datenverarbeitung: #12;CE-MS Analyse Daten Verarbeitung MosaVisu Kalibierung mit ProteinCluster auf SQL-Server ID ,,Protein Liste" Kalibrierte ,,protein list" ID Liste Vordefinierte Biomarker Probenvorbereitung

Manstein, Dietmar J.

220

Agnes von Matuschka Grndungsservice  

E-Print Network [OSTI]

Spielklassiker wie UFO, Jagged Alliance, Incubation und Fallout. In ,,GötterdÀmmerung: Iron Dawn" kÀmpfen zwei

Wichmann, Felix

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

KKLAVIERABENDLAVIERABEND DER KLAVIERKLASSE VON  

E-Print Network [OSTI]

zu 4 Händen D-Dur KV 381 Allegro, Andante, Allegro molto Karin Balser, Yukiko Imamichi Domenico) Sonate für Klavier und Violine, A-Dur Allegretto moderato ­ Allegro Barbara und Alexander Neubeck Franz

Pfeifer, Holger

222

Laserkhlung von Ionenkristallen Masterarbeit  

E-Print Network [OSTI]

laser light and trapped ions. There, the focus is on several possible laser cooling techniques properties of a new trap. The remaining parts deal with advanced techniques right up to ground state cooling of ground state cooling is presented which has the potential of achieving higher cooling rates and lower

Blatt, Rainer

223

Sources of stress gradients in electrodeposited Ni MEMS.  

SciTech Connect (OSTI)

The ability of future integrated metal-semiconductor micro-systems such as RF MEMS to perform highly complex functions will depend on developing freestanding metal structures that offer improved conductivity and reflectivity over polysilicon structures. For example, metal-based RF MEMS technology could replace the bulky RF system presently used in communications, navigation, and avionics systems. However, stress gradients that induce warpage of active components have prevented the implementation of this technology. Figure 1, is an interference micrograph image of a series of cantilever beams fabricated from electrodeposited Ni. The curvature in the beams was the result of stress gradients intrinsic to the electrodeposition process. To study the sources of the stress in electrodeposition of Ni we have incorporated a wafer curvature based stress sensor, the multibeam optical stress sensor, into an electrodeposition cell. We have determined that there are two regions of stress induced by electrodepositing Ni from a sulfamate-based bath (Fig 2). The stress evolution during the first region, 0-1000{angstrom}, was determined to be dependent only on the substrate material (Au vs. Cu), whereas the stress evolution during the second region, >1000{angstrom}, was highly dependent on the deposition conditions. In this region, the stress varied from +0.5 GPa to -0.5GPa, depending solely on the deposition rate. We examined four likely sources for the compressive intrinsic stress, i.e. reduction in tensile stress, and determined that only the adatom diffusion into grain boundaries model of Sheldon, et al. could account for the observed compressive stress. In the presentation, we shall discuss the compressive stress generation mechanisms considered and the ramifications of these results on fabrication of electrodeposited Ni for MEMS applications.

Hearne, Sean Joseph; Floro, Jerrold Anthony; Dyck, Christopher William

2004-06-01T23:59:59.000Z

224

Import von Adressbchern und Verteilerlisten Autor: Tim Frodermann; CIP-Pool der Philosophischen Fakultt III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser Dokumentation: 02.  

E-Print Network [OSTI]

Import von AdressbĂŒchern und Verteilerlisten Autor: Tim Frodermann; CIP-Pool der Philosophischen FakultĂ€t III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser Dokumentation: 02. November 2004 Bevor Frodermann; CIP-Pool der Philosophischen FakultĂ€t III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser

Rossak, Wilhelm R.

225

Effects of Prenatal Stress on Insulin Sensitivity, Physiological Stress Responses, Growth, and Temperament of Brahman Calves  

E-Print Network [OSTI]

prior to the ACTH infusion. .............................................................................. 39 Figure 4. Mean serum cortisol concentrations following an intravenous ACTH challenge in both control (C; open circle) and prenatally stressed... = 0.13), had an effect on serum cortisol concentrations following the infusion. ............................................................. 40 Figure 5. Mean serum cortisol concentrations before and after an intravenous corticotropin...

Schmidt, Sarah Erin

2014-04-24T23:59:59.000Z

226

Stress-Assisted Corrosion in Boiler Tubes  

SciTech Connect (OSTI)

A number of industrial boilers, including in the pulp and paper industry, needed to replace their lower furnace tubes or decommission many recovery boilers due to stress-assisted corrosion (SAC) on the waterside of boiler tubes. More than half of the power and recovery boilers that have been inspected reveal SAC damage, which portends significant energy and economic impacts. The goal of this project was to clarify the mechanism of stress-assisted corrosion (SAC) of boiler tubes for the purpose of determining key parameters in its mitigation and control. To accomplish this in-situ strain measurements on boiler tubes were made. Boiler water environment was simulated in the laboratory and effects of water chemistry on SAC initiation and growth were evaluated in terms of industrial operations. Results from this project have shown that the dissolved oxygen is single most important factor in SAC initiation on carbon steel samples. Control of dissolved oxygen can be used to mitigate SAC in industrial boilers. Results have also shown that sharp corrosion fatigue and bulbous SAC cracks have similar mechanism but the morphology is different due to availability of oxygen during boiler shutdown conditions. Results are described in the final technical report.

Preet M Singh; Steven J Pawel

2006-05-27T23:59:59.000Z

227

Assessment of the Mechanical Stress Improvement Process for Mitigating Primary Water Stress Corrosion Cracking in Nickel Alloy Butt Welds in Piping Systems Approved for Leak-Before-Break  

SciTech Connect (OSTI)

This report provides an assessment of the use of Mechanical Stress Improvement Process to reduce, or decrease, stress-driven degradation, i.e., primary water stress corrosion cracking.

Sullivan, Edmund J.; Anderson, Michael T.

2013-01-01T23:59:59.000Z

228

Stress enhanced diffusion of krypton ions in polycrystalline titanium  

SciTech Connect (OSTI)

An experimental investigation on the mutual influence of pre-existing residual stress and point defect following ion implantation is presented. The study has been carried out using polycrystalline titanium samples energetically implanted with krypton ions at different fluences. Ion beam analysis was used to determine the concentration profile of the injected krypton ions, while synchrotron X-ray diffraction has been used for stress determination. Ion beam analysis and synchrotron X-ray diffraction stress profile measurements of the implanted titanium samples show a clear evidence of stress-enhanced diffusion of krypton ions in titanium. It is further observed that for the titanium samples implanted at low fluence, ion implantation modifies the pre-existing residual stress through the introduction of point and open volume defects. The stress fields resulting from the ion implantation act to drift the krypton inclusions towards the surface of titanium.

Nsengiyumva, S., E-mail: s.nsengiyumva@ru.ac.za [Department of Physics and Electronics, Rhodes University, Grahamstown 6140 (South Africa); Raji, A. T. [School of Interdisciplinary Research and Graduate Studies, University of South Africa, Mucklenuek Campus, P O Box 392, UNISA 0003, Pretoria (South Africa); Rivière, J. P. [Laboratoire de Métallurgie Physique, UMR 6630 CNRS- Université de Poitiers, Bd M. et P. Curie, BP30179, 86962 Chasseneuil Futuroscope, Cedex (France); Britton, D. T.; Härting, M. [NanoSciences Innovation Center, Department of Physics, University of Cape Town, Rondebosch 7701 (South Africa)

2014-07-14T23:59:59.000Z

229

A CAVITATION TRACKING METHOD FOR ELASTIC-PLASTIC FLOW IN SOLIDS  

E-Print Network [OSTI]

A CAVITATION TRACKING METHOD FOR ELASTIC-PLASTIC FLOW IN SOLIDS Keh-Ming Shyue Department tracking approach for the numerical simulation of one-dimensional elastic- plastic flow in solids, and the von Mises condition for the elastic-plastic phase change. To characterize the cavitation

Shyue, Keh-Ming

230

Macroscopic yield criteria for plastic anisotropic materials containing spheroidal  

E-Print Network [OSTI]

Macroscopic yield criteria for plastic anisotropic materials containing spheroidal voids Vincent-Leblond-Devaux's (GLD) analysis of an rigid-ideal plastic (von Mises) spheroidal volume containing a confocal spheroidal of the proposed approximate yield criterion for plastic anisotropic media containing non-spherical voids

Paris-Sud XI, Université de

231

P wave anisotropy, stress, and crack distribution at Coso geothermal...  

Open Energy Info (EERE)

Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: P wave anisotropy, stress, and crack distribution at Coso geothermal field, California...

232

Tensile-stressed microelectromechanical apparatus and micromirrors formed therefrom  

DOE Patents [OSTI]

A microelectromechanical (MEM) apparatus is disclosed which includes one or more tensile-stressed actuators that are coupled through flexures to a stage on a substrate. The tensile-stressed actuators, which can be formed from tensile-stressed tungsten or silicon nitride, initially raise the stage above the substrate without any applied electrical voltage, and can then be used to control the height or tilt angle of the stage. An electrostatic actuator can also be used in combination with each tensile-stressed actuator. The MEM apparatus has applications for forming piston micromirrors or tiltable micromirrors and independently addressable arrays of such devices.

Fleming, James G. (Albuquerque, NM)

2006-05-16T23:59:59.000Z

233

Thermal Stress and Reliability for Advanced Power Electronics...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

D.C. ape017okeefe2010o.pdf More Documents & Publications Thermal Performance and Reliability of Bonded Interfaces Physics of Failure of Electrical Interconnects Thermal Stress...

234

Thermal Stress and Reliability for Advanced Power Electronics...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Washington D.C. ape14okeefe.pdf More Documents & Publications Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines Power Electronic Thermal...

235

Physics-Based Stress Corrosion Cracking Component Reliability  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Draft Report Supporting Technology Inputs to the Risk-...

236

Stresses in thermally grown alumina scales near edges and corners.  

SciTech Connect (OSTI)

We have investigated the residual stress near edges and corners of thermally grown alumina scales. Micro-fluorescence measurements, performed on alloys with composition Fe-5Cr-28Al (at.%, bal. Fe) oxidized at 900 C, showed a large (>50%) reduction in hydrostatic stress in the vicinity of edges and corners. Surprisingly, stress relaxation persists out to distances ten times the scale thickness from the edge. Finite element analysis calculations confirm the experimental results and provide a considerably more detailed picture of the stress distribution and its components.

Grimsditch, M.

1998-06-03T23:59:59.000Z

237

Membrane degradation Accelerated Stress Test | OSTI, US Dept...  

Office of Scientific and Technical Information (OSTI)

Membrane degradation Accelerated Stress Test Re-direct Destination: Abstract Not Provided times redirected to final destination ShortURL Code Published Current state Most recent...

238

Surge Nozzle NDE Specimen Mechanical Stress Improvement Analysis  

SciTech Connect (OSTI)

The purpose of this project was to perform a finite element analysis of a pressurized water reactor pressurizer surge nozzle mock-up to predict both the weld residual stresses created in its construction and the final stress state after the application of the Mechanical Stress Improvement Process (MSIP). Strain gages were applied to the inner diameter of the mock-up to record strain changes during the MSIP. These strain readings were used in an attempt to calculate the final stress state of the mock-up as well.

Fredette, Lee F.

2011-07-14T23:59:59.000Z

239

abiotic stress tolerance: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

abiotic stress and development Biology and Medicine Websites Summary: Miguel Angel Torres1 and Jeffery L Dangl1,2 The production of reactive oxygen intermediates (ROI...

240

Measuring depth profiles of residual stress with Raman spectroscopy  

SciTech Connect (OSTI)

Knowledge of the variation of residual stress is a very important factor in understanding the properties of machined surfaces. The nature of the residual stress can determine a part`s susceptibility to wear deformation, and cracking. Raman spectroscopy is known to be a very useful technique for measuring residual stress in many materials. These measurements are routinely made with a lateral resolution of 1{mu}m and an accuracy of 0.1 kbar. The variation of stress with depth; however, has not received much attention in the past. A novel technique has been developed that allows quantitative measurement of the variation of the residual stress with depth with an accuracy of 10nm in the z direction. Qualitative techniques for determining whether the stress is varying with depth are presented. It is also demonstrated that when the stress is changing over the volume sampled, errors can be introduced if the variation of the stress with depth is ignored. Computer aided data analysis is used to determine the depth dependence of the residual stress.

Enloe, W.S.; Sparks, R.G.; Paesler, M.A.

1988-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Three dimensional stress vector sensor array and method therefor  

DOE Patents [OSTI]

A sensor array is configured based upon capacitive sensor techniques to measure stresses at various positions in a sheet simultaneously and allow a stress map to be obtained in near real-time. The device consists of single capacitive elements applied in a one or two dimensional array to measure the distribution of stresses across a mat surface in real-time as a function of position for manufacturing and test applications. In-plane and normal stresses in rolling bodies such as tires may thus be monitored.

Pfeifer, Kent Bryant; Rudnick, Thomas Jeffery

2005-07-05T23:59:59.000Z

242

ataxia oxidative stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

levels (420 mgdl) was observed in 19% (n59) of mallards (Anas Green, Andy J. 73 Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Engineering...

243

angiogenesis oxidative stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

levels (420 mgdl) was observed in 19% (n59) of mallards (Anas Green, Andy J. 72 Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Engineering...

244

apoptotic oxidative stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

levels (420 mgdl) was observed in 19% (n59) of mallards (Anas Green, Andy J. 70 Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Engineering...

245

DOE Cell Component Accelerated Stress Test Protocols for PEM...  

Broader source: Energy.gov (indexed) [DOE]

CELL COMPONENT ACCELERATED STRESS TEST PROTOCOLS FOR PEM FUEL CELLS (Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies) March 2007 Fuel cells, especially for...

246

Cell Component Accelerated Stress Test Protocols for PEM Fuel...  

Broader source: Energy.gov (indexed) [DOE]

USCAR FUEL CELL TECH TEAM CELL COMPONENT ACCELERATED STRESS TEST PROTOCOLS FOR PEM FUEL CELLS (Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies) Revised May...

247

Microseismicity, stress, and fracture in the Coso geothermal...  

Open Energy Info (EERE)

Microseismicity, stress, and fracture in the Coso geothermal field, California Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Microseismicity,...

248

The Role of Geochemistry and Stress on Fracture Development and...  

Broader source: Energy.gov (indexed) [DOE]

The Role of Geochemistry and Stress on Fracture Development and Proppant Behavior in EGS Reservoirs Principal Investigator (Joseph Moore) Presenter Name (John McLennan)...

249

Residual Stresses for Structural Analysis and Fatigue Life Prediction...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Stresses for Structural Analysis and Fatigue Life Prediction in Vehicle Components: Success stories from the High Temperature Materials Laboratory (HTML) User Program Residual...

250

Accumulating Neighborhood Stress Exposure: Effects on Hypertension, Obesity, and Depression  

E-Print Network [OSTI]

expectancy consequences of hypertension. J Hypertens, 16(8),social disparities in hypertension prevalence, awareness,psychosocial stress cause hypertension? A systematic review

Jones, Fay Malia

2012-01-01T23:59:59.000Z

251

akuten psychischen stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

though no flow is present. The macroscopic stress evolution is connected to a length scale of residual liquefaction displayed by microscopic mean-squared displacements. The...

252

acute heat stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Olivier Chastel; Juan F. Masello 62 The Influence of Osmoreceptors and Baroreceptors on Heat Loss Responses during a Whole-body Passive Heat Stress . Open Access Theses and...

253

Modeling of grain boundary stresses in Alloy 600  

SciTech Connect (OSTI)

Corrosive environments combined with high stress levels and susceptible microstructures can cause intergranular stress corrosion cracking (IGSCC) of Alloy 600 components on both primary and secondary sides of pressurized water reactors. One factor affecting the IGSCC is intergranular carbide precipitation controlled by heat treatment of Alloy 600. This study is concerned with analysis of elastic stress fields in vicinity of M{sub 7}C{sub 3} and M{sub 23}C{sub 6} carbides precipitated in the matrix and at a grain boundary triple point. The local stress concentration which can lead to IGSCC initiation was studied using a two-dimensional finite element model. The intergranular precipitates are more effective stress raisers than the intragranular precipitates. The combination of the elastic property mismatch and the precipitate shape can result in a local stress field substantially different than the macroscopic stress. The maximum local stresses in the vicinity of the intergranular precipitate were almost twice as high as the applied stress.

Kozaczek, K.J. [Oak Ridge National Lab., TN (United States); Sinharoy, A.; Ruud, C.O. [Pennsylvania State Univ., University Park, PA (United States); Mcllree, A.R. [Electric Power Research Inst., Palo Alto, CA (United States)

1995-04-01T23:59:59.000Z

254

Adjustable shear stress erosion and transport flume  

DOE Patents [OSTI]

A method and apparatus for measuring the total erosion rate and downstream transport of suspended and bedload sediments using an adjustable shear stress erosion and transport (ASSET) flume with a variable-depth sediment core sample. Water is forced past a variable-depth sediment core sample in a closed channel, eroding sediments, and introducing suspended and bedload sediments into the flow stream. The core sample is continuously pushed into the flow stream, while keeping the surface level with the bottom of the channel. Eroded bedload sediments are transported downstream and then gravitationally separated from the flow stream into one or more quiescent traps. The captured bedload sediments (particles and aggregates) are weighed and compared to the total mass of sediment eroded, and also to the concentration of sediments suspended in the flow stream.

Roberts, Jesse D. (Carlsbad, NM); Jepsen, Richard A. (Carlsbad, NM)

2002-01-01T23:59:59.000Z

255

Active control of underground stresses through rock pressurization  

SciTech Connect (OSTI)

To significantly increase the stability of underground excavations while exploiting the full advantages of confined rock strength, methods must be developed to actively control the distribution of stresses near the excavation. This US Bureau of Mines study examines theoretical and practical aspects of rock pressurization, an active stress control concept that induces compressive stress in the wall rock through repeated hydraulic fracturing with a settable fluid. Numerical analyses performed by incorporating the rock pressurization concept into a variety of boundary-element models indicate that rock pressurization has the potential to improve underground excavation stability in three ways: (1) by relocating stress concentrations away from the weak opening surface to stronger, confined wall rock; (2) by inducing additional stresses in a biaxial stress field to reduce the difference between the principal stress components near the surface of the opening, and (3) by counteracting the tensile stresses induced in the rock around internally loaded openings. Practical aspects of the rock pressurization concept were investigated through a series of hydraulic fracturing experiments. The use of sulfur as a settable fluid for hydraulic fracturing was demonstrated, although problems related to sulfur viscosity suggest that other molten materials, such as wax, may be better suited to practical field application of the rock pressurization concept.

Vandergrift, T.L.

1995-06-01T23:59:59.000Z

256

Stress and Moisture Effects on Thin Film Buckling Delamination  

E-Print Network [OSTI]

­2 GPa compres- sive residual stresses were sputter deposited on top of thin (below 100 nm) copper superlayer with com- pressive residual stress was sputter deposited on top of the films in order to help Mechanics 2006 Abstract Deposition processes control the properties of thin films; they can also introduce

Volinsky, Alex A.

257

STRESSES AND FAILURE MODES IN THIN FILMS AND MULTILAYERS  

E-Print Network [OSTI]

Stressesin a Thin Film 4 2.3 Stresses in a Multilayer: Layer by Layer Deposition and Release from of the Interface a Bilayer under Residual Stress 30 5.2 Delamination of a Bilayer by Layer Cracking Parallel FOR THIN FILMS UNDER RESIDUAL COMPRESSION 36 6.1 Straight-sided Blisters 36 6.2 Circular Blisters 40 6

Hutchinson, John W.

258

A COUPLED HYDRAULIC AND ELECTRICAL STRESS DETERMINATION TECHNIQUE  

E-Print Network [OSTI]

A COUPLED HYDRAULIC AND ELECTRICAL STRESS DETERMINATION TECHNIQUE Mai Linh DOAN Département de Alps. The Hydraulic Tests on Preexisting Fractures (HTPF) method was chosen for it provides means to determine the complete stress tensor. The campaign was performed with a specific probe, coupling hydraulic

259

FORMATION GESTION DU STRESS CONTEXTE, PUBLIC, FINALITE DE LA FORMATION  

E-Print Network [OSTI]

FORMATION GESTION DU STRESS CONTEXTE, PUBLIC, FINALITE DE LA FORMATION La vie moderne et le stress : mettre en place des stratégies de gestion , étudier quelques aspects essentiels de la et cas cliniques composés par les participants ou fournis par le formateur . - Jeux de rôle en sous

Brest, Université de

260

Minimization of welding residual stress and distortion in large structures  

E-Print Network [OSTI]

1 Minimization of welding residual stress and distortion in large structures P. Michaleris at Champaign Urbana, Urbana, IL Abstract Welding distortion in large structures is usually caused by buckling due to the residual stress. In cases where the design is fixed and minimum weld size requirements

Michaleris, Panagiotis

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Stresses generated in cooling viscoelastic ice shells: Application to Europa  

E-Print Network [OSTI]

Stresses generated in cooling viscoelastic ice shells: Application to Europa F. Nimmo Department to cooling and the expansion of the shell due to the ice-water volume change. The former effect generates Citation: Nimmo, F. (2004), Stresses generated in cooling viscoelastic ice shells: Application to Europa, J

Nimmo, Francis

262

Thermally Induced Stresses in Functionally Graded Thick Tubes  

E-Print Network [OSTI]

thermal barrier coating for high temperature applications, a discrete layer of ceramic material is bondedThermally Induced Stresses in Functionally Graded Thick Tubes Senthil S. Vel and Rajeev Baskiyar method to obtain the temperature, displacements and thermal stresses. In addition to the thermal

Vel, Senthil

263

Ultrasonic detection of residual stress in a turbine disk  

E-Print Network [OSTI]

technique measured stresses within one standard deviation of 5000 psi. Further, the technique showed that in the as-received condstion stresses in the narrow and broad sides of the turbine disk rim were above 5500 psi tensile and above 20, 000 psi...

Pathak, Nitin

1992-01-01T23:59:59.000Z

264

Effect of 1-MCP on Cotton Plants Under Abiotic Stress  

E-Print Network [OSTI]

to stress conditions (heat and drought) and 1-MCP treatment at the seven-true-leaf stage. The heat stress study consisted of two 1-MCP rates (0 and 10 g a.i. ha-1) and two temperature regimes (optimum temperature: 30/20 șC (day/night temperature) and high...

Chen, Yuan

2013-05-06T23:59:59.000Z

265

RESIDUAL STRESS EFFECTS IN FRACTURE OF COMPOSITES AND ADHESIVES  

E-Print Network [OSTI]

RESIDUAL STRESS EFFECTS IN FRACTURE OF COMPOSITES AND ADHESIVES JOHN A. NAIRN ABSTRACT Because composites and adhesive joints are made from different phases with different thermal expansion coefficients, they inevitably develop residual thermal stresses. When designing composites or adhesive joints, it is important

Nairn, John A.

266

Stress-enhanced swelling of metal during irradiation  

SciTech Connect (OSTI)

Data are available which show that stress plays a major role in the development of radiation-induced void growth in AISI 316 and many other alloys. Earlier experiments came to the opposite conclusion and are shown to have investigated stress levels which inadvertantly cold-worked the material. Stress-affected swelling spans the entire temperature range in fast reactor irradiations and accelerates with increasing irradiatin temperature. It also appears to operate in all alloy starting conditions investigated. Two major microstructural mechanisms appear to be causing the enhancement of swelling, which for tensile stresses is manifested primarily as a decrease in the incubation period. These mechanisms are stress-induced changes in the interstitial capture efficiency of voids and stress-induced changes in the vacancy emission rate of various microstructural components. There also appears to be an enhancement of intermetallic phase formation with applied stress and this is shown to increase swelling by accelerating the microchemical evolution that precedes void growth at high temperature. This latter consideration complicates the extrapolation of these data to compressive stress states.

Garner, F.A.; Gilbert, E.R.; Porter, D.L.

1980-04-01T23:59:59.000Z

267

Effects of fiber and interfacial layer architectures on the thermoplastic response of metal-matrix composites  

SciTech Connect (OSTI)

Examined here is the effect of fiber and interfacial layer morphologies on thermal fields in metal matrix composites (MMCs). A micromechanics model based on an arbitrarily layered concentric cylinder configuration is used to calculate thermal stress fields in MMCs subjected to spatially uniform temperature changes. The fiber is modelled as a layered material with isotropic or orthotropic elastic layers, whereas the surrounding matrix, including interfacial layers, is treated as a strain-hardening, elastoplastic, von Mises solid with temperature-dependent parameters. The solution to the boundary-value problem of an arbitrarily layered concentric cylinder under the prescribed thermal loading is obtained using the local/global stiffness matrix formulation originally developed for stress analysis of multilayered elastic media. Examples are provided that illustrate how the morphology of the SCS6 silicon carbide fiber and the use of multiple compliant layers at the fiber/matrix interface affect the evolution of residual stresses in SiC/Ti composites during fabrication cool-down.

Pindera, M.J.; Freed, A.D.; Arnold, S.M.

1992-08-01T23:59:59.000Z

268

Lipocalin 2 regulation by thermal stresses: Protective role of Lcn2/NGAL against cold and heat stresses  

SciTech Connect (OSTI)

Environmental temperature variations are the most common stresses experienced by a wide range of organisms. Lipocalin 2 (Lcn2/NGAL) is expressed in various normal and pathologic conditions. However, its precise functions have not been fully determined. Here we report the induction of Lcn2 by thermal stresses in vivo, and its role following exposure to cold and heat stresses in vitro. Induction of Lcn2 in liver, heart and kidney was detected by RT-PCR, Western blot and immunohistochemistry following exposure of mice to heat and cold stresses. When CHO and HEK293T cells overexpressing NGAL were exposed to cold stress, cell proliferation was higher compared to controls. Down-regulatrion of NGAL by siRNA in A549 cells resulted in less proliferation when exposed to cold stress compared to control cells. The number of apoptotic cells and expression of pro-apoptotic proteins were lower in the NGAL overexpressing CHO and HEK293T cells, but were higher in the siRNA-transfected A549 cells compared to controls, indicating that NGAL protects cells against cold stress. Following exposure of the cells to heat stress, ectopic expression of NGAL protected cells while addition of exogenous recombinant NGAL to the cell culture medium exacerbated the toxicity of heat stress specially when there was low or no endogenous expression of NGAL. It had a dual effect on apoptosis following heat stress. NGAL also increased the expression of HO-1. Lcn2/NGAL may have the potential to improve cell proliferation and preservation particularly to prevent cold ischemia injury of transplanted organs or for treatment of some cancers by hyperthermia.

Roudkenar, Mehryar Habibi, E-mail: roudkenar@ibto.ir [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Halabian, Raheleh [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Roushandeh, Amaneh Mohammadi [Department of Anatomy, Faculty of Medicine, Medical University of Tabriz, Tabriz (Iran, Islamic Republic of)] [Department of Anatomy, Faculty of Medicine, Medical University of Tabriz, Tabriz (Iran, Islamic Republic of); Nourani, Mohammad Reza [Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of)] [Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of); Masroori, Nasser [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Ebrahimi, Majid [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of) [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of); Nikogoftar, Mahin; Rouhbakhsh, Mehdi; Bahmani, Parisa [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Najafabadi, Ali Jahanian [Department of Molecular Biology, Pasteur Institute of Iran, Tehran (Iran, Islamic Republic of)] [Department of Molecular Biology, Pasteur Institute of Iran, Tehran (Iran, Islamic Republic of); Shokrgozar, Mohammad Ali [National Cell Bank of Iran, Pasteur institute of Iran, Tehran (Iran, Islamic Republic of)] [National Cell Bank of Iran, Pasteur institute of Iran, Tehran (Iran, Islamic Republic of)

2009-11-01T23:59:59.000Z

269

E-Print Network 3.0 - aminoglycoside-mediated oxidative stress...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to stress... stress, but they were often low in streams with physical stress caused by metal oxide deposition. Stream... index St(pH) St(Zn) St(oxides) where St(pH) is the ......

270

E-Print Network 3.0 - avulsion-induced oxidative stress Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to stress... stress, but they were often low in streams with physical stress caused by metal oxide deposition. Stream... index St(pH) St(Zn) St(oxides) where St(pH) is the ......

271

Causes, consequences, and remedies for growth-induced solid stress in murine and human tumors  

E-Print Network [OSTI]

The presence of growth-induced solid stresses in tumors has been suspected for some time, but these stresses were largely estimated using mathematical models. Solid stresses can deform the surrounding tissues and compress ...

Martin, John D.

272

Threshold Stress Creep Behavior of Alloy 617 at Intermediate Temperatures  

SciTech Connect (OSTI)

Creep of Alloy 617, a solid solution Ni-Cr-Mo alloy, was studied in the temperature range of 1023 K to 1273 K (750 °C to 1000 °C). Typical power-law creep behavior with a stress exponent of approximately 5 is observed at temperatures from 1073 K to 1273 K (800 °C to 1000 °C). Creep at 1023 K (750 °C), however, exhibits threshold stress behavior coinciding with the temperature at which a low volume fraction of ordered coherent y' precipitates forms. The threshold stress is determined experimentally to be around 70 MPa at 1023 K (750 °C) and is verified to be near zero at 1173 K (900 °C)—temperatures directly correlating to the formation and dissolution of y' precipitates, respectively. The y' precipitates provide an obstacle to continued dislocation motion and result in the presence of a threshold stress. TEM analysis of specimens crept at 1023 K (750 °C) to various strains, and modeling of stresses necessary for y' precipitate dislocation bypass, suggests that the climb of dislocations around the y' precipitates is the controlling factor for continued deformation at the end of primary creep and into the tertiary creep regime. As creep deformation proceeds at an applied stress of 121 MPa and the precipitates coarsen, the stress required for Orowan bowing is reached and this mechanism becomes active. At the minimum creep rate at an applied stress of 145 MPa, the finer precipitate size results in higher Orowan bowing stresses and the creep deformation is dominated by the climb of dislocations around the y' precipitates.

J.K. Benz; L.J. Carroll; J.K. Wright; R.N. Wright; T. Lillo

2014-06-01T23:59:59.000Z

273

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-43(67) Definition 3.36: Das Verschieben der Bits um Positionen nach links (rechts) mit Auffllen durch Nullen heit  

E-Print Network [OSTI]

...10 - 0...0 realisiert die Multiplikation mit im Zweierkomplement: Satz 3.37: Tritt kein Ă?berlauf ein 2 einem Links-Shift der Ziffern von zk() um Positionen. Ă?berlauf tritt genau dann ein, wenn die...---1...10. 1. Fall: 0, also zk() = und -1 = 0. Tritt Ă?berlauf ein, so ist 2 2-1 , also 2--1 . Also ist

Arndt, Holger

274

Transient stress evolution in repulsion and attraction dominated glasses  

E-Print Network [OSTI]

We present results from microscopic mode coupling theory generalized to colloidal dispersions under shear in an integration-through-transients formalism. Stress-strain curves in start-up shear, flow curves, and normal stresses are calculated with the equilibrium static structure factor as only input. Hard spheres close to their glass transition are considered, as are hard spheres with a short-ranged square-well attraction at their attraction dominated glass transition. The consequences of steric packing and physical bond formation on the linear elastic response, the stress release during yielding, and the steady plastic flow are discussed and compared to experimental data from concentrated model dispersions.

Christian P. Amann; Matthias Fuchs

2014-06-04T23:59:59.000Z

275

Brain Derived Neurotrophic Factor Modulates Behavioral and Brain Responses to Social Stress.  

E-Print Network [OSTI]

?? Social stress is a prevalent factor in society that can cause or exacerbate neuropsychiatric disorders including depression and posttraumatic stress disorder. According to the… (more)

Jeffress, Elizabeth

2015-01-01T23:59:59.000Z

276

SciTech Connect: Stress corrosion cracking of alloy 600 using...  

Office of Scientific and Technical Information (OSTI)

Stress corrosion cracking of alloy 600 using the constant strain rate test Citation Details In-Document Search Title: Stress corrosion cracking of alloy 600 using the constant...

277

E-Print Network 3.0 - accelerate tibial stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

KNEE REPLACEMENTS Summary: may also affect the contact stresses exerted on the polyethylene tibial insert, thereby influencing... tibial insert contact stresses. The...

278

E-Print Network 3.0 - acetazolamide stress brain Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress brain Search Powered by Explorit Topic List Advanced Search Sample search results for: acetazolamide stress brain Page: << < 1 2 3 4 5 > >> 1 doi:10.1152...

279

E-Print Network 3.0 - air pollution stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress Search Powered by Explorit Topic List Advanced Search Sample search results for: air pollution stress Page: << < 1 2 3 4 5 > >> 1 Overall Project Description Objectives. A...

280

E-Print Network 3.0 - accelerated stress factors Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

search results for: accelerated stress factors Page: << < 1 2 3 4 5 > >> 1 Singapore Welding Society Newsletter, Sepember 1998 Stress Corrosion Cracking Summary: Singapore...

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

E-Print Network 3.0 - ameliorates oxidative stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress was observed in wild... leading to O3 sensitivity (Rao and Davis, 1999). Both salt and osmotic stress ... Source: Mlaga, Universidad de - Departamento de Biologa...

282

Stress effect on magnetoimpedance (MI) in amorphous wires at GHz frequencies and application to stress-tunable microwave composite materials  

E-Print Network [OSTI]

The effect of tensile stress on magnetoimpedance (MI) in CoMnSiB amorphous wires at microwave frequencies (0.5-3 GHz) is investigated both experimentally and theoretically. In the presence of the dc bias magnetic field of the order of the anisotropy field, the impedance shows very large and sensitive change when the wire is subjected to a tensile stress: 100% and 60% per 180 MPa for frequencies 500 MHz and 2.5 GHz, respectively. It is demonstrated that this behavior owes mainly to the directional change in the equilibrium magnetization caused by the applied stress and field, which agrees well with the theoretical results for the surface impedance. This stress effect on MI is proposed to use for creating microwave stress-tunable composite materials containing short magnetic wires. The analysis of the dielectric response from such materials shows that depending on the stress level in the material, the dispersion of the effective permittivity can be of a resonant or relaxation type with a considerable change in its values (up to 100% at 600 MPa). This media can be used for structural stress monitoring by microwave contrast imaging.

L. V. Panina; S. I. Sandacci; D. P. Makhnovskiy

2004-11-18T23:59:59.000Z

283

Stress measurements in rock salt using hydraulic fracturing  

SciTech Connect (OSTI)

Hydraulic fracturing was applied in horizontal drillholes in the Salado salt formation near Carlsbad, New Mexico. Testing took place approximately 650 m below surface in order to support the design of a Waste Isolation Pilot Plant (WIPP) for the disposal of radioactive waste from defense activities of the United States. Hydraulic fracturing was performed primarily to determine whether the virgin in situ stress state at the WIPP site is isotropic and whether the magnitudes of the the virgin in situ stresses correspond to the weight of the overburden. Beyond these limited objectives, measurements are being analyzed to evaluate the usefulness of hydraulic fracturing in salt formations in general. Such measurements are desirable to determine stresses induced by mining and to monitor time-dependent stress changes around underground excavations in salt masses. Hydraulic fracturing measurements are also relevant to the evaluation of allowable pressures before fracturing is induced in pressurized boreholes and storage caverns.

Wawersik, W.R.; Stone, C.M.

1986-01-01T23:59:59.000Z

284

Stress Wave Source Characterization: Impact, Fracture, and Sliding Friction  

E-Print Network [OSTI]

stress wave sources from the PMMA and rock are then linkedof a 3-D source inside an artificial rock, J. Sound Vib.two different calibration sources on the rock base plate. a,

McLaskey, Gregory Christofer

2011-01-01T23:59:59.000Z

285

Residual stress in electrodeposited nanocrystalline nickel-tungsten coatings  

E-Print Network [OSTI]

Characterizing the residual stress of thick nanocrystalline electrodeposits poses several unique challenges due to their fine grain structure, thickness distribution, and matte surface. We use a three-dimensional ...

Ziebell, Tiffany D.

286

acute maternal stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Psychosocial Stress and Their Relationship to Level of Habitual Caffeine Consumption JAMES D. LANE, PH.D., R. ALISON ADCOCK, B.A., REDFORD B. WILLIAMS, M.D., AND CYNTHIA M....

287

Propeller blade stress estimates using lifting line theory  

E-Print Network [OSTI]

OpenProp, an open-source computational tool for the design and analysis of propellers and horizontal-axis turbines, is extended to provide estimates of normal stresses in the blades for both on- and off-design operating ...

Epps, Brenden P.

288

apoptosis oxidative stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 81 Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Engineering...

289

The effect of anticipatory psychosocial stress on frontal executive functions   

E-Print Network [OSTI]

Previous research has found that stress hormone cortisol affects cognition, especially those cognitive abilities associated with the areas of the brain abundant in glucocorticoid receptors (e.g. Lupien & McEwen, 1997). ...

Olga, Wudarczyk

2010-06-30T23:59:59.000Z

290

Nondestructive testing using stress waves: wave propagation in layered media  

E-Print Network [OSTI]

The use of stress waves in several civil engineering applications such as nondestructive testing of soil deposits or pavement systems has become extremely popular over the last few years. In all cases, a dynamic impulse is applied to the surface...

Ortega, Jose Alberto

2013-02-22T23:59:59.000Z

291

Evaluation of heat stress in an aluminum smelter  

E-Print Network [OSTI]

of heat stress and heat strain was evaluated for the aluminum smelter workers at Alcoa, Rockdale Operations. Personal, environmental, and metabolic factors that contribute to heat-related illnesses were identified. The effectiveness of current...

Rose, Stacy Rahkell

1999-01-01T23:59:59.000Z

292

Evaluation of iron-deficiency stress response of maize  

E-Print Network [OSTI]

A nutrient solution system with siliceous ferrihydrite as the Fe source was developed to screen 20 maize cultivars in a growth chamber for their Fe-deficiency stress tolerances. The Fe-supplying power of the siliceous ferrihydrite was compared...

Choi, Yim Hong

1996-01-01T23:59:59.000Z

293

Seismicity and seismic stress in the Coso Range, Coso geothermal...  

Open Energy Info (EERE)

seismic stress in the Coso Range, Coso geothermal field, and Indian Wells Valley region, Southeast-Central California Jump to: navigation, search OpenEI Reference LibraryAdd to...

294

STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND...  

Open Energy Info (EERE)

FLANK AND COSO WASH Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND...

295

Compressive stress enhances coordinated migration of mammary carcinoma cells  

E-Print Network [OSTI]

Cancer research has traditionally focused on genetic and biochemical changes during tumor progression. Uncontrolled cell proliferation of a solid tumor in a confined space not only creates well-studied oxidative stress ...

Tse, Janet M. (Janet Man-Yu)

2010-01-01T23:59:59.000Z

296

Transformation induced plasticity assisted steels: stress or strain affected martensitic  

E-Print Network [OSTI]

Transformation induced plasticity assisted steels: stress or strain affected martensitic transformation? S. Chatterjee and H. K. D. H. Bhadeshia* Transformation induced plasticity (TRIP) assisted steels contain a small quantity of carbon enriched retained austenite, which transforms into martensite during

Cambridge, University of

297

Residual stress measurement using X-ray diffraction  

E-Print Network [OSTI]

difference can be measured. Magnetoacoustic emission is the generation of elastic waves caused by changes in magnetostrictive strain during the movement of magnetic domain walls and is generally detected from the material bulk. Barkhausen emission... when a material is subjected to a stress, the changes providing a measure of the stress averaged along the wave path. The acoustoelastic coefficients necessary for the analysis are usually calculated using calibration tests. Different types of wave...

Anderoglu, Osman

2005-02-17T23:59:59.000Z

298

Stress analysis of a hybrid composite drilling riser  

E-Print Network [OSTI]

technique for homogenizing material properties of adjacent plies was de- veloped to reduce the number of elements through the wall thickness. The results were postproc- essed to obtain ply level stress and strain data and used to make a prediction... with the Institut Franpais de Pdtrole and Aerospatiale, designed composite tubes (9 inch inner diameter) for riser applica- tions that satisfied four constraints: zero axial expansion due to thermal loads or internal pressure, and design stresses in the two...

Sundstrom, Keith Andrew

1996-01-01T23:59:59.000Z

299

An investigation of stress concentration effects in welding elbows  

E-Print Network [OSTI]

AN INVESTIGATION OF STRESS CONCENTRATION EFFECTS IN WELDING ELBOWS A Thesis by MIKE WAYNE BALLARD Submitted to the Graduate College of Texas A & M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... December, 1986 Major Subject; Mechanical Engineering AN INVESTIGATION OF STRESS CONC~TION EFFECTS IN WELDING ELBOWS A Thesis by MIKE WAYNE BALLARD Approved as to style and content by; Mog Henriksen (Ch ' of Committee) Joh J. (Me er) lorn Brya L...

Ballard, Mike Wayne

1987-01-01T23:59:59.000Z

300

A study of Macrophomina phaseolina, soybean, and water stress  

E-Print Network [OSTI]

A STUDY OF MACROPHOMINA PHASEOLINA, SOYBEAN, AND WATER STRESS A Thesis by FREDERICK MILTON SHOKES Submitted to the Graduate College of Texas A8cM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1975 Major Subject: Plant Physiology A STUDY OF MACROPHOMINA PHASEOLINA, SOYBEAN, AND WATER STRESS A Thesis by FREDERICK MILTON SHOKES Approved as to style and content by: Co-C irman o Committee o-Chairman o Committee cad artment Member...

Shokes, Frederick Milton

1975-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Method to adjust multilayer film stress induced deformation of optics  

DOE Patents [OSTI]

A buffer-layer located between a substrate and a multilayer for counteracting stress in the multilayer. Depositing a buffer-layer having a stress of sufficient magnitude and opposite in sign reduces or cancels out deformation in the substrate due to the stress in the multilayer. By providing a buffer-layer between the substrate and the multilayer, a tunable, near-zero net stress results, and hence results in little or no deformation of the substrate, such as an optic for an extreme ultraviolet (EUV) lithography tool. Buffer-layers have been deposited, for example, between Mo/Si and Mo/Be multilayer films and their associated substrate reducing significantly the stress, wherein the magnitude of the stress is less than 100 MPa and respectively near-normal incidence (5.degree.) reflectance of over 60% is obtained at 13.4 nm and 11.4 nm. The present invention is applicable to crystalline and non-crystalline materials, and can be used at ambient temperatures.

Mirkarimi, Paul B. (Sunol, CA); Montcalm, Claude (Livermore, CA)

2000-01-01T23:59:59.000Z

302

On the capillary stress tensor in wet granular materials  

E-Print Network [OSTI]

This paper presents a micromechanical study of unsaturated granular media in the pendular regime, based upon numerical experiments using the discrete element method, compared to a microstructural elastoplastic model. Water effects are taken into account by adding capillary menisci at contacts and their consequences in terms of force and water volume are studied. Simulations of triaxial compression tests are used to investigate both macro and micro-effects of a partial saturation. The results provided by the two methods appear to be in good agreement, reproducing the major trends of a partially saturated granular assembly, such as the increase in the shear strength and the hardening with suction. Moreover, a capillary stress tensor is exhibited from capillary forces by using homogenisation techniques. Both macroscopic and microscopic considerations emphasize an induced anisotropy of the capillary stress tensor in relation with the pore fluid distribution inside the material. In so far as the tensorial nature of this fluid fabric implies shear effects on the solid phase associated with suction, a comparison has been made with the standard equivalent pore pressure assumption. It is shown that water effects induce microstrural phenomena that cannot be considered at the macro level, particularly when dealing with material history. Thus, the study points out that unsaturated soil stress definitions should include, besides the macroscopic stresses such as the total stress, the microscopic interparticle stresses such as the ones resulting from capillary forces, in order to interpret more precisely the implications of the pore fluid on the mechanical behaviour of granular materials.

Luc Scholtès; Pierre-Yves Hicher; François Nicot; Bruno Chareyre; Félix Darve

2011-05-05T23:59:59.000Z

303

Opportunities and Challenges for Nondestructive Residual Stress Assessment  

SciTech Connect (OSTI)

For a long time, nondestructive residual stress assessment has been one of the greatest opportunities as well as one of the greatest challenges for the NDE community, and probably it will remain so in the foreseeable future. The most critical issue associated with nondestructive residual stress assessment seems to be that of selectivity. Numerous NDE methods have been found to be sufficiently sensitive to the presence of residual stress, but unfortunately also rather sensitive to other spurious variations that usually accompany residual stresses, such as anisotropic texture, microstructural inhomogeneity, plastic deformation, etc., which could interfere with, or even overshadow, the elastic strain caused by the sought residual stress. The only sufficiently selective NDE method that is more or less immune from these spurious effects is X-ray diffraction measurement, which however does not have the required penetration depth in most applications unless high-energy neutron radiation is used. It is timely for the community to sit back and ask where we are in this important area. This paper presents an overview of the various indirect techniques that have been used to measure residual stress in the past. It is shown that traditional techniques have a number of limitations, which have spurred several recent research programs. Some of the new techniques that are presently being examined in the NDE community are reviewed and the current status of these research efforts is assessed.

Nagy, P. B. [Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, Ohio 45221-0070 (United States)

2006-03-06T23:59:59.000Z

304

Single-wavenumber Representation of Nonlinear Energy Spectrum in Elastic-Wave Turbulence of {F}öppl-von {K}ármán Equation: Energy Decomposition Analysis and Energy Budget  

E-Print Network [OSTI]

A single-wavenumber representation of nonlinear energy spectrum, i.e., stretching energy spectrum is found in elastic-wave turbulence governed by the F\\"oppl-von K\\'arm\\'an (FvK) equation. The representation enables energy decomposition analysis in the wavenumber space, and analytical expressions of detailed energy budget in the nonlinear interactions are obtained for the first time in wave turbulence systems. We numerically solved the FvK equation and observed the following facts. Kinetic and bending energies are comparable with each other at large wavenumbers as the weak turbulence theory suggests. On the other hand, the stretching energy is larger than the bending energy at small wavenumbers, i.e., the nonlinearity is relatively strong. The strong correlation between a mode $a_{\\bm{k}}$ and its companion mode $a_{-\\bm{k}}$ is observed at the small wavenumbers. Energy transfer shows that the energy is input into the wave field through stretching-energy transfer at the small wavenumbers, and dissipated through the quartic part of kinetic-energy transfer at the large wavenumbers. A total-energy flux consistent with the energy conservation is calculated directly by using the analytical expression of the total-energy transfer, and the forward energy cascade is observed clearly.

Naoto Yokoyama; Masanori Takaoka

2014-12-09T23:59:59.000Z

305

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Jung, R. (1975). Hydraulic Fracturing Stress Measurements,measurement in hydraulic fracturing has been described by

Cook, Neville G.W.

2010-01-01T23:59:59.000Z

306

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Jung, R. (1975). Hydraulic Fracturing Stress Measurements,measurement in hydraulic fracturing has been described by

Jamison, Dennis B.; Cook, Neville G.W.

2008-01-01T23:59:59.000Z

307

Plastic cap evolution law derived from induced transverse isotropy in dilatational triaxial compression.  

SciTech Connect (OSTI)

Mechanical testing of porous materials generates physical data that contain contributions from more than one underlying physical phenomenon. All that is measurable is the “ensemble” hardening modulus. This thesis is concerned with the phenomenon of dilatation in triaxial compression of porous media, which has been modeled very accurately in the literature for monotonic loading using models that predict dilatation under triaxial compression (TXC) by presuming that dilatation causes the cap to move outwards. These existing models, however, predict a counter-intuitive (and never validated) increase in hydrostatic compression strength. This work explores an alternative approach for modeling TXC dilatation based on allowing induced elastic anisotropy (which makes the material both less stiff and less strong in the lateral direction) with no increase in hydrostatic strength. Induced elastic anisotropy is introduced through the use of a distortion operator. This operator is a fourth-order tensor consisting of a combination of the undeformed stiffness and deformed compliance and has the same eigenprojectors as the elastic compliance. In the undeformed state, the distortion operator is equal to the fourth-order identity. Through the use of the distortion operator, an evolved stress tensor is introduced. When the evolved stress tensor is substituted into an isotropic yield function, a new anisotropic yield function results. In the case of the von Mises isotropic yield function (which contains only deviatoric components), it is shown that the distortion operator introduces a dilatational contribution without requiring an increase in hydrostatic strength. In the thesis, an introduction and literature review of the cap function is given. A transversely isotropic compliance is presented, based on a linear combination of natural bases constructed about a transverse-symmetry axis. Using a probabilistic distribution of cracks constructed for the case of transverse isotropy, a compliance expression is presented that demonstrated a decrease in lateral stiffness, but leaves axial stiffness unchanged. A demonstration of how the distortion operator could be used in the elastic/plastic analysis of a von Mises surface loaded in TXC is also presented.

Macon, David James; Brannon, Rebecca Moss; Strack, Otto Erik

2014-02-01T23:59:59.000Z

308

Influence of target structure on film stress in WTi sputtering  

SciTech Connect (OSTI)

In this report, the effect of sputtering target microstructure on the deposited film stress was investigated. By controlling the metallurgical process, two types of W-10wt%Ti target constituents, namely single-phase and multiple-phase WTi, were prepared. The former one was composed of W-rich ({beta}Ti,W) phase only, the latter one was with W, W-rich ({beta}Ti,W) and Ti-rich ({beta}Ti,W) phases. The stress of the films deposited on 12.7 cm diameter silicon oxide wafers from the single-phase target tends to be more compressive than that from the multiple-phase target. By increasing wafer temperature, the compressive stress was linearly decreased. In addition, the level of film stress was also affected by the film thickness and other sputtering parameters. To understand the causes for the differences in film stress between the multiple-phase and single-phase derived films, an evaluation of the film structure using a field-emission scanning electron microscope (FE-SEM) and mechanical testing using a nano-indentation instrument were performed. Finer domains with denser laminar structure were observed on the films deposited from the single-phase target. However, no significant difference in mechanical properties was found between these two from the nano-indentation measurements. It is envisioned that the more uniform solid solution between the W and Ti in the films obtained by sputtering the single-phase targets generates a higher compressive stress when deposited on the silicon oxide wafers resulting in a higher compressive stress.

Lo, C.F.; Wang, H.; Gilman, P. [Materials Research Corp., Orangeburg, NY (United States)

1998-12-31T23:59:59.000Z

309

The importance of in-situ-stress profiles in hydraulic-fracturing applications  

SciTech Connect (OSTI)

In-situ stresses define the local forces acting on lithologic layers in the subsurface. Knowledge of these stresses is important in drilling, wellbore-stability, and, especially, hydraulic-fracturing applications. The measurement of in-situ stress is not straightforward and, therefore, often goes unmeasured. As such, one often assumes values of in-situ stress or estimate in-situ stresses from logging parameters. This article illustrates the importance of in-situ-stress estimates as they relate to hydraulic fracturing and outlines several techniques for estimating in-situ-stress magnitudes.

Hopkins, C.W. [S.A. Holditch and Associates, Inc., Houston, TX (United States). Houston Div.

1997-09-01T23:59:59.000Z

310

Performance of Nb3Sn Quadrupole Under High Stress  

SciTech Connect (OSTI)

Future upgrades of the Large Hadron Collider (LHC) will require large aperture and high gradient quadrupoles. Nb{sub 3}Sn is the most viable option for this application but is also known for its strain sensitivity. In high field magnets, with magnetic fields above 12 T, the Lorentz forces will generate mechanical stresses that may exceed 200 MPa in the windings. The existing measurements of critical current versus strain of Nb{sub 3}Sn strands or cables are not easily applicable to magnets. In order to investigate the impact of high mechanical stress on the quench performance, a series of tests was carried out within a LBNL/CERN collaboration using the magnet TQS03 (a LHC Accelerator Research Program (LARP) 1-meter long, 90-mm aperture Nb{sub 3}Sn quadrupole). The magnet was tested four times at CERN under various pre-stress conditions. The average mechanical compressive azimuthal pre-stress on the coil at 4.2 K ranged from 120 MPa to 200 MPa. This paper reports on the magnet performance during the four tests focusing on the relation between pre-stress conditions and the training plateau.

Felice, H.; Bajko, M.; Bingham, B.; Bordini, B.; Bottura, L.; Caspi, S.; Rijk, G. De; Dietderich, D.; Ferracin, P.; Giloux, C.; Godeke, A.; Hafalia, R.; Milanese, A.; Rossi, L.; Sabbi, G. L.

2010-08-01T23:59:59.000Z

311

Connecting local active forces to macroscopic stress in elastic media  

E-Print Network [OSTI]

In contrast with ordinary materials, living matter drives its own motion by generating active, out-of-equilibrium internal stresses. These stresses typically originate from localized active elements embedded in an elastic medium, such as molecular motors inside the cell or contractile cells in a tissue. While many large-scale phenomenological theories of such active media have been developed, a systematic understanding of the emergence of stress from the local force-generating elements is lacking. In this paper, we present a rigorous theoretical framework to study this relationship. We show that the medium's macroscopic active stress tensor is equal to the active elements' force dipole tensor per unit volume in both continuum and discrete linear homogeneous media of arbitrary geometries. This relationship is conserved on average in the presence of disorder, but can be violated in nonlinear elastic media. Such effects can lead to either a reinforcement or an attenuation of the active stresses, giving us a glimpse of the ways in which nature might harness microscopic forces to create active materials.

Pierre Ronceray; Martin Lenz

2014-11-12T23:59:59.000Z

312

Quantification of residual stress from photonic signatures of fused silica  

SciTech Connect (OSTI)

A commercially available grey-field polariscope (GFP) instrument for photoelastic examination is used to assess impact damage inflicted upon the outer-most pane of Space Shuttle windows made from fused silica. A method and apparatus for calibration of the stress-optic coefficient using four-point bending is discussed. The results are validated on known material (acrylic) and are found to agree with literature values to within 6%. The calibration procedure is then applied to fused-silica specimens and the stress-optic coefficient is determined to be 2.43 ± 0.54 Ś 10{sup ?12} Pa{sup ?1}. Fused silica specimens containing impacts artificially made at NASA’s Hypervelocity Impact Technology Facility (HIT-F), to simulate damage typical during space flight, are examined. The damage sites are cored from fused silica window carcasses and examined with the GFP. The calibrated GFP measurements of residual stress patterns surrounding the damage sites are presented.

Cramer, K. Elliott; Yost, William T. [NASA Langley Research Center, Hampton, VA 23681 (United States); Hayward, Maurice [College of William and Mary, Williamsburg, VA 23185 (United States)

2014-02-18T23:59:59.000Z

313

Oxidative stress and oxidative damage in chemical carcinogenesis  

SciTech Connect (OSTI)

Reactive oxygen species (ROS) are induced through a variety of endogenous and exogenous sources. Overwhelming of antioxidant and DNA repair mechanisms in the cell by ROS may result in oxidative stress and oxidative damage to the cell. This resulting oxidative stress can damage critical cellular macromolecules and/or modulate gene expression pathways. Cancer induction by chemical and physical agents involves a multi-step process. This process includes multiple molecular and cellular events to transform a normal cell to a malignant neoplastic cell. Oxidative damage resulting from ROS generation can participate in all stages of the cancer process. An association of ROS generation and human cancer induction has been shown. It appears that oxidative stress may both cause as well as modify the cancer process. Recently association between polymorphisms in oxidative DNA repair genes and antioxidant genes (single nucleotide polymorphisms) and human cancer susceptibility has been shown.

Klaunig, James E., E-mail: jklauni@indiana.edu; Wang Zemin; Pu Xinzhu; Zhou Shaoyu

2011-07-15T23:59:59.000Z

314

Fracture Toughness and Maximum Stress in a Disordered Lattice System  

E-Print Network [OSTI]

Fracture in a disordered lattice system is studied. In our system, particles are initially arranged on the triangular lattice and each nearest-neighbor pair is connected with a randomly chosen soft or hard Hookean spring. Every spring has the common threshold of stress at which it is cut. We make an initial crack and expand the system perpendicularly to the crack. We find that the maximum stress in the stress-strain curve is larger than those in the systems with soft or hard springs only (uniform systems). Energy required to advance fracture is also larger in some disordered systems, which indicates that the fracture toughness improves. The increase of the energy is caused by the following two factors. One is that the soft spring is able to hold larger energy than the hard one. The other is that the number of cut springs increases as the fracture surface becomes tortuous in disordered systems.

Chiyori Urabe; Shinji Takesue

2008-12-29T23:59:59.000Z

315

Tensile-stressed microelectromechanical apparatus and microelectromechanical relay formed therefrom  

DOE Patents [OSTI]

A microelectromechanical (MEM) apparatus is disclosed which includes a shuttle suspended above a substrate by two or more sets of tensile-stressed beams which are operatively connected to the shuttle and which can comprise tungsten or a silicon nitride/polysilicon composite structure. Initially, the tensile stress in each set of beams is balanced. However, the tensile stress can be unbalanced by heating one or more of the sets of beams; and this can be used to move the shuttle over a distance of up to several tens of microns. The MEM apparatus can be used to form a MEM relay having relatively high contact and opening forces, and with or without a latching capability.

Fleming, James G. (Albuquerque, NM)

2008-03-04T23:59:59.000Z

316

Torsional waves propagation in an initially stressed dissipative cylinder  

E-Print Network [OSTI]

The present paper has been framed to show the effect of damping on the propagation of torsional waves in an initially stressed, dissipative, incompressible cylinder of infinite length. A governing equation has been formulated on Biot's incremental deformation theory. The velocities of torsional waves are obtained as complex ones, in which real part gives the phase velocity of propagation and corresponding imaginary part gives the damping. The study reveals that the damping of the medium has strong effect in the propagation of torsional wave. Since every medium has damping so it is more realistic to use the damped wave equation instead of the undamped wave equation. The study also shows that the velocity of propagation of such waves depend on the presence of initial stress. The influences of damping and initial stresses are shown separately.

M. M. Selim

2009-03-28T23:59:59.000Z

317

Triple-material stress-strain resistivity gage  

DOE Patents [OSTI]

A triple material piezoresistive gage provides multi-component elastic stress measurements is disclosed. Thin foils of three piezoresistive materials, e.g. ytterbium, manganin, and constantan, are configured in a nested serpentine rectilinear grid or other grid arrangement and embedded in a medium, preferably normal to the direction of shock wave propagation. The output of the gage is a resistivity change history for each material of the gage. Each resistivity change is independent of the others so that three diagonal components of the elastic stress or strain tensor can be calculated from the resistivity measurements. 4 figs.

Stout, R.B.

1988-05-17T23:59:59.000Z

318

Residual stresses in bakelite models induced by quenching  

E-Print Network [OSTI]

and the bellows was extended to six inobes. Lifter proper focusing and using a Kodachrome type 4 film, separate piotures were made at openings f8, fll, f16, and f22 in order to provide for a suitable spread of exposure. Sodium vapor was used as the source... for determining the residual stresses or the elastic redistribution of stresses that occurs after the prototype has undergone some plastio deformation or heat treatment. The creep characteristics of bakelite, BT-61-893, become appreciable with temperatures...

Jarvi, Ray Victor

1952-01-01T23:59:59.000Z

319

A study of the stress-strain response of sand  

E-Print Network [OSTI]

. Chen (1948) found a linear fit of log (col - u3) vs. log si for "the major portion of the stress-strain curve" using a vacuum triaxial test on a clean sand. The fit displayed two sharp departures from linearity, one near 0, 01K strain and one near... results qualitat1vely by adjusting observed stress-strain curves to correct for seating error. 29 20 18 16 3 m=~ 1 m =? 2 1 m =? 4 m=0 14 12 I Vl 10 (After O'Brien) K2 = 40, 000 1, 000 0. 01 0. 02 0. 03 0. 04 0. 05 Figure 16. Family...

Bigham, Robert Eric

2012-06-07T23:59:59.000Z

320

An investigation of residual stress in welded joints  

E-Print Network [OSTI]

not extended beyond eight days time~ therefore the curve does not show com- plete relaxation of stress v!ith age of weld. However the figures "or the longitudinal stress compare favorably with that calculated by Houlton and iiartin (1) of 55, 000 psi... are bolted or doweled to a heavy cast iron or steel frame as shown which is of sufficient rigidity that all of the strain takes place in the specimen. The weld and the strain gage are separated sufficiently and the area between may be water cooled so II...

Moffat, William Hugh

1951-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
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321

Gauge Invariant Effective Stress-Energy Tensors for Gravitational Waves  

E-Print Network [OSTI]

It is shown that if a generalized definition of gauge invariance is used, gauge invariant effective stress-energy tensors for gravitational waves and other gravitational perturbations can be defined in a much larger variety of circumstances than has previously been possible. In particular it is no longer necessary to average the stress-energy tensor over a region of spacetime which is larger in scale than the wavelengths of the waves and it is no longer necessary to restrict attention to high frequency gravitational waves.

Paul R. Anderson

1996-09-09T23:59:59.000Z

322

Triple-material stress-strain resistivity gage  

DOE Patents [OSTI]

A triple material piezoresistive gage provides multi-component elastic stress or strain measurements. Thin foils of three piezoresistive materials, e.g., ytterbium, manganin, and constantan, are configured in a nested serpentine rectilinear grind or other grind arrangement and embedded in a medium, preferably normal to the direction of shock wave propagation. The output of the gage is a resistivity change history for each material of gage. Each resistivity change is independent of the others so that three diagonal components of the elastic stress or strain tensor can be calculated form the resistivity measurements. 4 figs.

Stout, R.B.

1987-05-19T23:59:59.000Z

323

Zymomonas with improved xylose utilization in stress conditions  

DOE Patents [OSTI]

Strains of xylose utilizing Zymomonas with improved xylose utilization and ethanol production during fermentation in stress conditions were obtained using an adaptation method. The adaptation involved continuously growing xylose utilizing Zymomonas in media containing high sugars, acetic acid, ammonia, and ethanol.

Caimi, Perry G; Emptage, Mark; Li, Xu; Viitanen, Paul V; Chou, Yat-Chen; Franden, Mary Ann; Zhang, Min

2013-06-18T23:59:59.000Z

324

Progress Report on Alloy 617 Isochronous Stress-Strain Curves  

SciTech Connect (OSTI)

Isochronous stress-strain curves for Alloy 617 up to a temperature of 1000°C will be required to qualify the material for elevated temperature design in Section III, Division 1, Subsection NH of the ASME Boiler and Pressure Vessel Code. Several potential methods for developing these curves are reviewed in this report. It is shown that in general power-law creep is the rate controlling deformation mechanism for a wide range of alloy heats, test temperatures and stresses. Measurement of the strain rate sensitivity of Alloy 617 indicates that the material is highly strain rate sensitive in the tensile deformation range above about 750°C. This suggests that the concept of a hot tensile curve as a bounding case on the isochronous stress-strain diagrams is problematic. The impact of strain rate on the hot tensile curves is examined and it is concluded that incorporating such a curve is only meaningful if a single tensile strain rate (typically the ASTM standard rate of 0.5%/min) is arbitrarily defined. Current experimentally determined creep data are compared to isochronous stress-strain curves proposed previously by the German programs in the 1980s and by the 1990 draft ASME Code Case. Variability in how well the experimental data are represented by the proposed design curves that suggests further analysis is necessary prior to completing a new draft Code Case.

Jill K. Wright; Richard N. Wright; Nancy J. Lybeck

2014-03-01T23:59:59.000Z

325

A theoretical study on stress sensitive differential amplifier (SSDA)  

E-Print Network [OSTI]

or load pair) will cause a current unmatchment in between of the two FETs which will follow the variation sensitivity is studied. The results show that both two input MOSFETs and two load MOSFETs of a SSDA can, the possibility of using active load FETs of a dif- ferential amplifier as stress sensitive element is discussed

Li, Jingjing

326

REYNOLDS STRESS MODEL IMPLEMENTATION FOR HYPERSONIC FLOW SIMULATIONS  

E-Print Network [OSTI]

REYNOLDS STRESS MODEL IMPLEMENTATION FOR HYPERSONIC FLOW SIMULATIONS Arianna Bosco, PhD student, 52056 Aachen, Germany Abstract The simulation of hypersonic flows presents some difficulties due of the model is analyzed. 1 Introduction The aerodynamic design of hypersonic inlets is a criti- cal issue

327

Computer aided analysis for residual stress measurement using ultrasonic techniques  

E-Print Network [OSTI]

to detect travel-times with a precision of 0. l nanoseconds and an accuracy of less than 2.5 nanoseconds. A residual stress reference standard developed for previous research was used as the sample to measure travel-times. The sample was designed...

Kypa, Jagan Mohan

1999-01-01T23:59:59.000Z

328

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes  

E-Print Network [OSTI]

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes School of Materials Science Boiler Areas Susceptible to SAC · Generally SAC initiates near weld joints on cold side of tubes · SAC cracks are difficult to detect inaccessibility · Failures Detected at Various Locations in Boilers

Das, Suman

329

RESEARCH ARTICLE Impact of water stress on citrus yield  

E-Print Network [OSTI]

October 2011 # INRA and Springer-Verlag, France 2011 Abstract Water shortage is becoming a severe problemRESEARCH ARTICLE Impact of water stress on citrus yield Iván García-Tejero & Victor Hugo Durán in arid and semi-arid regions worldwide, reducing the avail- ability of agricultural land and water

Paris-Sud XI, Université de

330

Stress tensor and bulk viscosity in relativistic nuclear collisions  

E-Print Network [OSTI]

We discuss the influence of different initial conditions for the stress tensor and the effect of bulk viscosity on the expansion and cooling of the fireball created in relativistic heavy ion collisions. In particular, we explore the evolution...however, it does not significantly increase the entropy produced....

Fries, Rainer J.; Mueller, Berndt; Schaefer, Andreas.

2008-01-01T23:59:59.000Z

331

Estimating Usage Can Reduce the Stress of Social Networking  

E-Print Network [OSTI]

Estimating Usage Can Reduce the Stress of Social Networking Abstract Social networks participants with an objective measure of their social network usage and also asked them for a daily estimate of their usage over the previous 24 hours. Although their social network usage did not significantly change

Subramanian, Sriram

332

Sensing the dynamics of oxidative stress using enhanced absorption in  

E-Print Network [OSTI]

play a key role in cell signalling and oxidative stress mechanisms, therefore, sensing their production of cyt c in the presence of H2O2 with unprecedented sensitivity. Dynamic information on the modification of the cell oxidative status of Chlamydomonas reinhardtii, an aquatic green algae, was obtained under

Dalang, Robert C.

333

ACCELERATED TECHNIQUE TO PREDICT STRESS-RUPTURE BEHAVIOUR OF ARAMID  

E-Print Network [OSTI]

ACCELERATED TECHNIQUE TO PREDICT STRESS-RUPTURE BEHAVIOUR OF ARAMID FIBRES Ioannis P. Giannopoulos-rupture, Accelerated testing, Jaw effect, Creep activation energy ABSTRACT: The Stepped Isothermal Method (SIM) allows accelerated testing of materials to determine their creep response, and in particular, their creep

Burgoyne, Chris

334

Prediction of corn tortilla textural quality using stress relaxation methods  

E-Print Network [OSTI]

). The effects of moisture content and resting time on corn masa textural property were investigated. Texture of properties of corn tortilla (fresh up to stale) was evaluated using the stress relaxation technique in two different modes, pure tension and bending-tension...

Guo, Zhihong

1998-01-01T23:59:59.000Z

335

Shear-induced sedimentation in yield stress fluids Guillaume Ovarlez  

E-Print Network [OSTI]

if a given material will remain ho- mogeneous during a flow. Using MRI techniques, we study the time the local shear rate in the interstitial fluid. Keywords: Sedimentation; Yield stress fluid; Suspension; MRI some lift or dispersion forces to the particles. This principle is typically used in fluidization

Paris-Sud XI, Université de

336

Early stages in the development of stress corrosion cracks  

SciTech Connect (OSTI)

Processes in growth of short cracks and stage I of long stress corrosion cracks were identified and evaluated. There is evidence that electrochemical effects can cause short stress corrosion cracks to grow at rates faster or slower than long cracks. Short cracks can grow at faster rates than long cracks for a salt film dissolution growth mechanism or from reduced oxygen inhibition of hydrolytic acidification. An increasing crack growth rate with increasing crack length could result from a process of increasing crack tip concentration of a critical anion, such as Cl{sup {minus}}, with increasing crack length in a system where the crack velocity is dependent on the Cl{sup {minus}} or some other anion concentration. An increasing potential drop between crack tip and mouth would result in an increased anion concentration at the crack tip and hence an increasing crack velocity. Stage I behavior of long cracks is another early development stage in the life of a stress corrosion crack which is poorly understood. This stage can be described by da/dt = AK{sup m} where da/dt is crack velocity, A is a constant, K is stress intensity and m ranges from 2 to 24 for a variety of materials and environments. Only the salt film dissolution model was found to quantitatively describe this stage; however, the model was only tested on one material and its general applicability is unknown.

Jones, R.H.; Simonen, E.P.

1993-12-01T23:59:59.000Z

337

The future of global water stress: An integrated assessment*  

E-Print Network [OSTI]

stress, with 80% of these located in developing countries. Uncertain regional climate change can play quantitative analysis and predictions of the risks of climate change and the challenges of limiting human to climate change. To this end, the Program brings together an interdisciplinary group from two established

338

EFFECTIVE TENSILE STRESS-STRAIN CHARACTERISTICS FOR REINFORCED CONCRETE  

E-Print Network [OSTI]

EFFECTIVE TENSILE STRESS-STRAIN CHARACTERISTICS FOR REINFORCED CONCRETE L. Hwang, Graduate Student of reinforced concrete structures, the concrete continues to contribute to the effective stiffness of structures for reinforced concrete developed for analysis of reinforced and/or prestressed concrete structures. The model

339

Real-Time Redox Measurements during Endoplasmic Reticulum Stress Reveal  

E-Print Network [OSTI]

Real-Time Redox Measurements during Endoplasmic Reticulum Stress Reveal Interlinked Protein Folding.10.011 SUMMARY Disruption of protein folding in the endoplasmic reticulum (ER) causes unfolded proteins to accumu is active. Because ER redox po- tential is optimized for oxidative protein folding, we reasoned

Mullins, Dyche

340

Initiation stress threshold irradiation assisted stress corrosion cracking criterion assessment for core internals in PWR environment  

SciTech Connect (OSTI)

Irradiation assisted stress corrosion cracking (IASCC) is a problem of growing importance in pressurized water reactors (PWR). An understanding of the mechanism(s) of IASCC is required in order to provide guidance for the development of mitigation strategies. One of the principal reasons why the IASCC mechanism(s) has been so difficult to understand is the inseparability of the different IASCC potential contributors evolutions due to neutron irradiation. The potential contributors to IASCC in PWR primary water are: (i) radiation induced segregation (RIS) at grain boundaries, (ii) radiation induced microstructure (formation and growth of dislocations loops, voids, bubbles, phases), (iii) localized deformation under loading, (iv) irradiation creep and transmutations. While the development of some of the contributors (RIS, microstructure) with increasing doses are at least qualitatively well understood, the role of these changes on IASCC remains unclear. Parallel to fundamental understanding developments relative to IASCC, well controlled laboratory tests on neutron irradiated stainless steels are needed to assess the main mechanisms and also to establish an engineering criterion relative to the initiation of fracture due to IASCC. First part of this study describes the methodology carried out at CEA in order to provide more experimental data from constant load tests dedicated to the study of initiation of SCC on neutron irradiated stainless steel. A description of the autoclave recirculation loop dedicated to SCC tests on neutron irradiated materials is then given. This autoclave recirculation loop has been started on July 2010 with the first SCC test on an irradiated stainless steel (grade 316) performed at CEA. The main steps of the interrupted SCC tests are then described. Second part of this paper reports the partial results of the first test performed on a highly neutron irradiated material. (authors)

Tanguy, Benoit; Stern, Anthony; Bossis, Philippe [CEA, DEN-DMN, Gif-sur-Yvette, (France); Pokor, Cedric [EDF les Renardieres, Moret-sur-Loing, (France)

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

The elastic stress tensor of an axially symmetric three-layered earth model  

E-Print Network [OSTI]

everywhere. Also, equilibrium requires a strength in the material everywhere at least as great as the local stress difference. Therefore, the question he posed was, given the surface stresses what strength in the interior would be sufficient to preserve...

Rayhorn, James Edwin

2012-06-07T23:59:59.000Z

342

Silicon micromachined sensors and sensor arrays for shear-stress measurements in aerodynamic flows  

E-Print Network [OSTI]

In this thesis we report on a new micromachined floating-element shear-stress sensor for turbulent boundary layer research. Applications in low shear-stress environments such as turbulent boundary layers require extremely ...

Padmanabhan, Aravind

343

Increased oxidative stress in barn swallows from the Chernobyl region Andrea Bonisoli-Alquati a,  

E-Print Network [OSTI]

Increased oxidative stress in barn swallows from the Chernobyl region Andrea Bonisoli-Alquati a Available online 5 November 2009 Keywords: Antioxidant capacity Barn swallow Chernobyl Oxidative stress Radioactive contamination Reactive oxygen species The Chernobyl nuclear accident produced the largest

Mousseau, Timothy A.

344

Molecular cloning and characterization of important stress and redox regulatory genes from Hydra vulgaris  

E-Print Network [OSTI]

In this research, important stress and redox regulatory genes present in Hydra vulgaris were isolated and characterized to facilitate our understanding of the evolution and mechanisms of stress response. H. vulgaris heat shock protein 70 (HvHSP70...

Dash, Bhagirathi

2007-04-25T23:59:59.000Z

345

Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi*  

E-Print Network [OSTI]

Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Department of Basic 2004 Available online 14 November 2004 Abstract Acrolein, a byproduct of lipid peroxidation, has been demonstrates that acrolein can directly stimulate mitochondrial oxidative stress. Specifically, exposure

Shi, Riyi

346

Metabolism in orange fruits is driven by photooxidative stress in the leaves Florine Poiroux-Gonorda  

E-Print Network [OSTI]

this article as doi: 10.1111/ppl.12023 © 2013 Scandinavian Plant Physiology Society, ISSN 0031-9317 hal.1111/ppl.12023 #12;In plants, stress signals propagate to trigger distant responses and thus stress

Boyer, Edmond

347

Step-Stress Accelerated Degradation Testing (SSADT) for Photovoltaic (PV) Devices and Cells (Presentation)  

SciTech Connect (OSTI)

Presentation on step-stress accelerated degradation testing (SSADT) for photovoltaics (PV). Developed are a step-stress degradation test (SSADT) for PV reliability tests and a lifetime prediction model for PV products.

Lee, J.; Elmore, R.; Suh, C.; Jones, W.

2010-10-01T23:59:59.000Z

348

Restoration of hippocampal growth hormone reverses stress-induced hippocampal impairment  

E-Print Network [OSTI]

Though growth hormone (GH) is synthesized by hippocampal neurons, where its expression is influenced by stress exposure, its function is poorly characterized. Here, we show that a regimen of chronic stress that impairs ...

Vander Weele, Caitlin Miya

349

Influence of electrode stress on proton exchange membrane fuel cell performance : experimental characterization and power optimization  

E-Print Network [OSTI]

Compressive stress applied to the electrode area of a Proton Exchange Membrane (PEM) fuel cell is known to significantly affect power output. In practice, electrode stress arises during operation due to the clamping force ...

Gallant, Betar M. (Betar Maurkah)

2008-01-01T23:59:59.000Z

350

A Role for Repressive Histone Methylation in Cocaine-Induced Vulnerability to Stress  

E-Print Network [OSTI]

Substance abuse increases an individual's vulnerability to stress-related illnesses, which is presumably mediated by drug-induced neural adaptations that alter subsequent responses to stress. Here, we identify repressive ...

Covington, Herbert E.

351

Determination of applied stresses in rails using the acoustoelastic effect of ultrasonic waves  

E-Print Network [OSTI]

This research develops a procedure to determine the applied stresses in rails using the acoustoelastic effect of ultrasonic waves. Acoustoelasticity is defined as the stress dependency of ultrasonic wave speed or wave polarization. Analytical models...

Gokhale, Shailesh Ashok

2008-10-10T23:59:59.000Z

352

Determination of applied stresses in rails using the acoustoelastic effect of ultrasonic waves  

E-Print Network [OSTI]

This research develops a procedure to determine the applied stresses in rails using the acoustoelastic effect of ultrasonic waves. Acoustoelasticity is defined as the stress dependency of ultrasonic wave speed or wave polarization. Analytical models...

Gokhale, Shailesh Ashok

2009-05-15T23:59:59.000Z

353

E-Print Network 3.0 - altered stress performance Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Technology Rev. IFP, Vol. 57 (2002), No. 5, pp. 525-538 Copyright 2002, ditions Technip Summary: performance, i.e. how stresses and stress alterations affect preferred flow...

354

Stress Corrosion Cracking and Delayed Increase in Penetration Resistance after Dynamic Compaction of Sand  

E-Print Network [OSTI]

Stress Corrosion Cracking and Delayed Increase in Penetration Resistance after Dynamic Compaction on the process of stress corrosion cracking of the micro-morphological features on the surface of the sand grains

Michalowski, Radoslaw L.

355

E-Print Network 3.0 - acute thermal stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

With Summary: with the finding that Caco-2 cells are sensitive to thermal killing but resistant to oxidative stress. Acute heat... 38VA). Acute heat stress (45-518C, 30 min) caused...

356

Noninvasive detection of the hemodynamic stress of exercise using the photoplethysmogram  

E-Print Network [OSTI]

fatigue provide a mechanism for noninvasively detecting hemodynamic stress to the human vascular system; respiratory rate Moderate hemodynamic stress can be detected by moni- toring increases in heart rate, blood

Linder, Stephen

357

Corticosterone mediates the effects of chronic stress on Theiler's virus in mice  

E-Print Network [OSTI]

to nonstressed-infected mice. Two experiments identified the mediator of these effects as corticosterone, a stress hormone released by the HPA axis. The first experiment found that restraint stress elevated corticosterone levels, and the second experiment found...

Satterlee, Danielle Marie

2013-02-22T23:59:59.000Z

358

E-Print Network 3.0 - alleviates oxidative stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Osmotic Stress in Summary: Evidence for a Role of Salicylic Acid in the Oxidative Damage Generated by NaCl and Osmotic Stress... , a greater increase in the oxidized state of...

359

Modeling the relation between suction, effective stress and shear strength in partially saturated granular media  

E-Print Network [OSTI]

Decades of geotechnical research firmly established that the mechanical properties (shear strength and deformation characteristics) of soils are related to soil's "effective stress", i.e. the stress carried by the solid ...

Toker, Nabi Kartal, 1979-

2007-01-01T23:59:59.000Z

360

Tissue plasminogen activator and plasminogen mediate stress-induced decline of neuronal and  

E-Print Network [OSTI]

, and expression of growth-associated protein-43 in the cornu ammonis 1 region. Strikingly, the stress

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Pre-Stressed Viscoelastic Composites: Effective Incremental Moduli and Band-Gap Tuning  

SciTech Connect (OSTI)

We study viscoelastic wave propagation along pre-stressed nonlinear elastic composite bars. In the pre-stressed state we derive explicit forms for the effective incremental storage and loss moduli with dependence on the pre-stress. We also derive a dispersion relation for the effective wavenumber in the case of arbitrary frequency, hence permitting a study of viscoelastic band-gap tuning via pre-stress.

Parnell, William J. [School of Mathematics, Alan Turing Building, University of Manchester, Manchester, M13 9PL (United Kingdom)

2010-09-30T23:59:59.000Z

362

Stress-specific signatures: expression profiling of p53 wild-type and -null human cells  

E-Print Network [OSTI]

of the transcribed genome. For instance, up to 20% of the yeast genome may be stress responsive (Jelinsky et al

363

Stressed Plants and Herbivores: Exploring the Mechanisms of Drought's Impact on Cotton Physiology and Plant-Herbivore Interactions  

E-Print Network [OSTI]

than continuously stressed. I conducted two, 10-week field studies to test the effects of drought on arthropods using 0.6 hectares of cotton. Stress was implemented by withholding water from continuously stressed plants and using pulsed watering...

Sconiers, Warren Boyce

2014-07-17T23:59:59.000Z

364

Residual Stress Relaxation and Microstructure in ZnO Thin Films Istem Ozena  

E-Print Network [OSTI]

to be eliminated during deposition. Introduction In this study, the decay of the residual stressesResidual Stress Relaxation and Microstructure in ZnO Thin Films Istem Ozena and Mehmet Ali Gulgunb. a istem@sabanciuniv.edu b m-gulgun@sabanciuniv.edu Keywords: ZnO, thin films, residual stress

Yanikoglu, Berrin

365

Microstructure, residual stress, and fracture of sputtered TiN films Liqiang Zhang a  

E-Print Network [OSTI]

Microstructure, residual stress, and fracture of sputtered TiN films Liqiang Zhang a , Huisheng Keywords: TiN films Residual stress Hardness Fracture toughness Morphology, structure, residual stress, hardness, and fracture toughness of magnetron sputtered titanium nitride (TiN) thin films, deposited at 300

Volinsky, Alex A.

366

Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and  

E-Print Network [OSTI]

Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and Upper Shelf fracture stress and stress modified fracture strain models are utilized to describe the variation of lower and upper shelf fracture toughness with temperature and strain rate for two alloy steels used

Ritchie, Robert

367

2010 MICROBIAL STRESS RESPONSE GORDON RESEARCH CONFERENCE, JULY 18-23, 2010  

SciTech Connect (OSTI)

The 2010 Gordon Research Conference on Microbial Stress Responses provides an open and exciting forum for the exchange of scientific discoveries on the remarkable mechanisms used by microbes to survive in nearly every niche on the planet. Understanding these stress responses is critical for our ability to control microbial survival, whether in the context of biotechnology, ecology, or pathogenesis. From its inception in 1994, this conference has traditionally employed a very broad definition of stress in microbial systems. Sessions will cover the major steps of stress responses from signal sensing to transcriptional regulation to the effectors that mediate responses. A wide range of stresses will be represented. Some examples include (but are not limited to) oxidative stress, protein quality control, antibiotic-induced stress and survival, envelope stress, DNA damage, and nutritional stress. The 2010 meeting will also focus on the role of stress responses in microbial communities, applied and environmental microbiology, and microbial development. This conference brings together researchers from both the biological and physical sciences investigating stress responses in medically- and environmentally relevant microbes, as well as model organisms, using cutting-edge techniques. Computational, systems-level, and biophysical approaches to exploring stress responsive circuits will be integrated throughout the sessions alongside the more traditional molecular, physiological, and genetic approaches. The broad range of excellent speakers and topics, together with the intimate and pleasant setting at Mount Holyoke College, provide a fertile ground for the exchange of new ideas and approaches.

Sarah Ades

2011-07-23T23:59:59.000Z

368

Paper No. PLSMI POST-LIQUEFACTION STATE OF SAND, STRESS CORROSION  

E-Print Network [OSTI]

Paper No. PLSMI POST-LIQUEFACTION STATE OF SAND, STRESS CORROSION CRACKING, AND RELAXATION in the process of stress corrosion cracking of the micro-morphological features on the surface of the sand grains: Dynamic compaction of sand, Sand liquefaction, Stress corrosion cracking, Static fatigue INTRODUCTION

Michalowski, Radoslaw L.

369

Figure 1: Multiplex logarithmic microfluidic perfusion array for probing shear stress effects on stem cells. (A)  

E-Print Network [OSTI]

Figure 1: Multiplex logarithmic microfluidic perfusion array for probing shear stress effects on stem cells. (A) Microfluidic perfusion systems exhibit more defined shear stress profiles and consume. (B) A 1x6 multiplex logarithmic microfluidic array for simultaneous application of shear stress

Voldman, Joel

370

Using Uncertainty Analysis to Guide the Development of Accelerated Stress Tests (Presentation)  

SciTech Connect (OSTI)

Extrapolation of accelerated testing to the long-term results expected in the field has uncertainty associated with the acceleration factors and the range of possible stresses in the field. When multiple stresses (such as temperature and humidity) can be used to increase the acceleration, the uncertainty may be reduced according to which stress factors are used to accelerate the degradation.

Kempe, M.

2014-03-01T23:59:59.000Z

371

Stress-corrosion cracking in BWR and PWR piping  

SciTech Connect (OSTI)

Intergranular stress-corrosion cracking of weld-sensitized wrought stainless steel piping has been an increasingly ubiquitous and expensive problem in boiling-water reactors over the last decade. In recent months, numerous cracks have been found, even in large-diameter lines. A number of potential remedies have been developed. These are directed at providing more resistant materials, reducing weld-induced stresses, or improving the water chemistry. The potential remedies are discussed, along with the capabilities of ultrasonic testing to find and size the cracks and related safety issues. The problem has been much less severe to date in pressurized-water reactors, reflecting the use of different materials and much lower coolant oxygen levels.

Weeks, R.W.

1983-07-01T23:59:59.000Z

372

Stress analysis of closure bolts for shipping casks  

SciTech Connect (OSTI)

This report specifies the requirements and criteria for stress analysis of closure bolts for shipping casks containing nuclear spent fuels or high level radioactive materials. The specification is based on existing information conceming the structural behavior, analysis, and design of bolted joints. The approach taken was to extend the ASME Boiler and Pressure Vessel Code requirements and criteria for bolting analysis of nuclear piping and pressure vessels to include the appropriate design and load characteristics of the shipping cask. The characteristics considered are large, flat, closure lids with metal-to-metal contact within the bolted joint; significant temperature and impact loads; and possible prying and bending effects. Specific formulas and procedures developed apply to the bolt stress analysis of a circular, flat, bolted closure. The report also includes critical load cases and desirable design practices for the bolted closure, an in-depth review of the structural behavior of bolted joints, and a comprehensive bibliography of current information on bolted joints.

Mok, G.C.; Fischer, L.E. (Lawrence Livermore National Lab., CA (United States)); Hsu, S.T. (Kaiser Engineers, Oakland, CA (United States))

1993-01-01T23:59:59.000Z

373

Slow stress relaxation in randomly disordered nematic elastomers and gels  

E-Print Network [OSTI]

Randomly disordered (polydomain) liquid crystalline elastomers align under stress. We study the dynamics of stress relaxation before, during and after the Polydomain-Monodomain transition. The results for different materials show the universal ultra-slow logarithmic behaviour, especially pronounced in the region of the transition. The data is approximated very well by an equation Sigma(t) ~ Sigma_{eq} + A/(1+ Alpha Log[t]). We propose a theoretical model based on the concept of cooperative mechanical resistance for the re-orientation of each domain, attempting to follow the soft-deformation pathway. The exact model solution can be approximated by compact analytical expressions valid at short and at long times of relaxation, with two model parameters determined from the data.

S. M. Clarke; E. M. Terentjev

1998-05-28T23:59:59.000Z

374

Protein structure and hydration probed by SANS and osmotic stress  

SciTech Connect (OSTI)

Interactions governing protein folding, stability, recognition, and activity are mediated by hydration. Here, we use small-angle neutron scattering coupled with osmotic stress to investigate the hydration of two proteins, lysozyme and guanylate kinase (GK), in the presence of solutes. By taking advantage of the neutron contrast variation that occurs upon addition of these solutes, the number of protein-associated (solute-excluded) water molecules can be estimated from changes in both the zero-angle scattering intensity and the radius of gyration. Poly(ethylene glycol) exclusion varies with molecular weight. This sensitivity can be exploited to probe structural features such as the large internal GK cavity. For GK, small-angle neutron scattering is complemented by isothermal titration calorimetry with osmoticstress to also measure hydration changes accompanying ligand binding. These results provide a framework for studying other biomolecular systems and assemblies using neutron scattering together with osmotic stress.

Rau, Dr. Donald [National Institutes of Health

2008-01-01T23:59:59.000Z

375

Uncertainty in the maximum principal stress estimated from hydraulic fracturing Measurements due to the presence of the induced fracture  

E-Print Network [OSTI]

reopening during hydraulic fracturing stress determinations.Laboratory study of hydraulic fracturing pressure data?Howevaluation of hydraulic fracturing stress measurement

Rutqvist, Jonny; Tsang, Chin-fu; Stephansson, Ove

2000-01-01T23:59:59.000Z

376

Post-Translational Regulation of the NKG2D Ligand Mult1 in Response to Cell Stress  

E-Print Network [OSTI]

of Mult1 degradation by stress pathways UV irradiation, butof Mult1 degradation by stress pathways UV irradiation, buttranslationally UV irradiation induces Mult1 The degradation

Nice, Timothy James

2009-01-01T23:59:59.000Z

377

Direct measurement of yield stress of discrete materials  

E-Print Network [OSTI]

We present a novel computational method for direct measurement of yield stress of discrete materials. The method is well-suited for the measurement of jamming phase diagram of a wide range of discrete particle systems such as granular materials, foams, and colloids. We further successfully apply the method to evaluate the jamming phase diagram of wet granular material in order to demonstrates the applicability of the model.

S. H. Ebrahimnazhad Rahbari; J. Vollmer; S. Herminghaus; M. Brinkmann

2012-06-09T23:59:59.000Z

378

Microorganisms having enhanced tolerance to inhibitors and stress  

DOE Patents [OSTI]

The present invention provides genetically modified strains of microorganisms that display enhanced tolerance to stress and/or inhibitors such as sodium acetate and vanillin. The enhanced tolerance can be achieved by increasing the expression of a protein of the Sm-like superfamily such as a bacterial Hfq protein and a fungal Sm or Lsm protein. Further, the present invention provides methods of producing alcohol from biomass materials by using the genetically modified microorganisms of the present invention.

Brown, Steven D.; Yang, Shihui

2014-07-29T23:59:59.000Z

379

Environmental stress cracking of plastics under dynamic conditions  

E-Print Network [OSTI]

The objective of this study was to find out if dynamic conditions have any effect on the phenomenon of environmental stress cracking (ESC). Dynamic conditions in this study include thermal shock, mechanical shock, and vibrations. Injection blow molded... resistance of blow molded polyethylene containers. The experimental data indicated that each of the dynamic conditions accelerated the ESC. Therefore, the results obtained from the static tests cannot be used to predict the service life of the containers...

Suresh, Mitta

1992-01-01T23:59:59.000Z

380

Von Dreele Receives Hanawalt Award  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism inS-4500IIVasudhaSurface. |Volunteering employees,

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Stress localization, stiffening and yielding in a model colloidal gel  

E-Print Network [OSTI]

We use numerical simulations and an athermal quasi-static shear protocol to investigate the yielding of a model colloidal gel. Under increasing deformation, the elastic regime is followed by a significant stiffening before yielding takes place. A space-resolved analysis of deformations and stresses unravel how the complex load curve observed is the result of stress localization and that the yielding can take place by breaking a very small fraction of the network connections. The stiffening corresponds to the stretching of the network chains, unbent and aligned along the direction of maximum extension. It is characterized by a strong localization of tensile stresses, that triggers the breaking of a few network nodes at around 30% of strain. Increasing deformation favors further breaking but also shear-induced bonding, eventually leading to a large-scale reorganization of the gel structure at the yielding. At low enough shear rates, density and velocity profiles display significant spatial inhomogeneity during yielding in agreement with experimental observations.

Jader Colombo; Emanuela Del Gado

2014-06-16T23:59:59.000Z

382

Residual Stress Evaluation within a Crimped Splice Connector Assembly  

SciTech Connect (OSTI)

In power transmission, connectors play an important role in the efficiency and reliability of the system. Due to the increase of power demand and lack of new infrastructure, existing overhead power transmission lines often need to operate at temperatures higher than the original design criteria. However, this had led to the accelerated aging and degradation of splice connectors, which has been manifested by the formation of hot-spots that have been revealed by infrared imaging during inspection of transmission lines operating at elevated temperatures. The implications of connector aging is two-fold: (1) significant increase in resistivity of the splice connector (i.e., less efficient transmission of electricity) and (2) significant reduction in the connector clamping strength, which ultimately results in separation of the power transmission line at the joint. Therefore, the splice connector has become the weakest link in the electric power transmission infrastructure. The compressive residual stresses induced by the crimping process within the splice provide the clamping forces to secure the conductor and therefore, the determination of the state of residual stresses in splice connectors is a necessary requirement to provide an accurate estimate of their service lifetime. This paper presents a protocol of utilizing finite-element analysis and neutron scattering experiments for evaluating the residual stress fields within a crimped single-stage splice connector assembly.

Wang, Jy-An John [ORNL; An, Ke [ORNL; Lara-Curzio, Edgar [ORNL; Hubbard, Camden R [ORNL; King Jr, Thomas J [ORNL; Graziano, Joe [Tennessee Valley Authority (TVA); Chan, John [Electric Power Research Institute (EPRI)

2006-01-01T23:59:59.000Z

383

Weibull Effective Area for Hertzian Ring Crack Initiation Stress  

SciTech Connect (OSTI)

Spherical or Hertzian indentation is used to characterize and guide the development of engineered ceramics under consideration for diverse applications involving contact, wear, rolling fatigue, and impact. Ring crack initiation can be one important damage mechanism of Hertzian indentation. It is caused by sufficiently-high, surface-located, radial tensile stresses in an annular ring located adjacent to and outside of the Hertzian contact circle. While the maximum radial tensile stress is known to be dependent on the elastic properties of the sphere and target, the diameter of the sphere, the applied compressive force, and the coefficient of friction, the Weibull effective area too will be affected by those parameters. However, the estimations of a maximum radial tensile stress and Weibull effective area are difficult to obtain because the coefficient of friction during Hertzian indentation is complex, likely intractable, and not known a priori. Circumventing this, the Weibull effective area expressions are derived here for the two extremes that bracket all coefficients of friction; namely, (1) the classical, frictionless, Hertzian case where only complete slip occurs, and (2) the case where no slip occurs or where the coefficient of friction is infinite.

Jadaan, Osama M. [University of Wisconsin, Platteville; Wereszczak, Andrew A [ORNL; Johanns, Kurt E [ORNL

2011-01-01T23:59:59.000Z

384

Toxicological and pharmacological concerns on oxidative stress and related diseases  

SciTech Connect (OSTI)

Although reactive oxygen species (ROS) such as superoxide, hydrogen peroxide and hydroxyl radical are generated as the natural byproduct of normal oxygen metabolism, they can create oxidative damage via interaction with bio-molecules. The role of oxidative stress as a remarkable upstream part is frequently reported in the signaling cascade of inflammation as well as chemo attractant production. Even though hydrogen peroxide can control cell signaling and stimulate cell proliferation at low levels, in higher concentrations it can initiate apoptosis and in very high levels may create necrosis. So far, the role of ROS in cellular damage and death is well documented with implicating in a broad range of degenerative alterations e.g. carcinogenesis, aging and other oxidative stress related diseases (OSRDs). Reversely, it is cleared that antioxidants are potentially able to suppress (at least in part) the immune system and to enhance the normal cellular protective responses to tissue damage. In this review, we aimed to provide insights on diverse OSRDs, which are correlated with the concept of oxidative stress as well as its cellular effects that can be inhibited by antioxidants. Resveratrol, angiotensin converting enzyme inhibitors, angiotensin receptor blockers, statins, nebivolol and carvedilol, pentaerythritol tetranitrate, mitochondria-targeted antioxidants, and plant-derived drugs (alone or combined) are the potential medicines that can be used to control OSRD.

Saeidnia, Soodabeh [Medicinal Plants Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411 (Iran, Islamic Republic of); College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon (Canada); Abdollahi, Mohammad, E-mail: Mohammad@TUMS.Ac.Ir [Department of Toxicology and Pharmacology, Faculty of Pharmacy, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 1417614411 (Iran, Islamic Republic of)

2013-12-15T23:59:59.000Z

385

Yield criteria for quasibrittle and frictional materials  

E-Print Network [OSTI]

A new yield/damage function is proposed for modelling the inelastic behaviour of a broad class of pressure-sensitive, frictional, ductile and brittle-cohesive materials. The yield function allows the possibility of describing a transition between the shape of a yield surface typical of a class of materials to that typical of another class of materals. This is a fundamental key to model the behaviour of materials which become cohesive during hardening (so that the shape of the yield surface evolves from that typical of a granular material to that typical of a dense material), or which decrease cohesion due to damage accumulation. The proposed yield function is shown to agree with a variety of experimental data relative to soil, concrete, rock, metallic and composite powders, metallic foams, porous metals, and polymers. The yield function represents a single, convex and smooth surface in stress space approaching as limit situations well-known criteria and the extreme limits of convexity in the deviatoric plane. The yield function is therefore a generalization of several criteria, including von Mises, Drucker-Prager, Tresca, modified Tresca, Coulomb-Mohr, modified Cam-clay, and --concerning the deviatoric section-- Rankine and Ottosen. Convexity of the function is proved by developing two general propositions relating convexity of the yield surface to convexity of the corresponding function. These propositions are general and therefore may be employed to generate other convex yield functions.

Davide Bigoni; Andrea Piccolroaz

2010-10-09T23:59:59.000Z

386

Thermal stress analysis of fused-cast AZS refractories during production; Part 2: Development of thermo-elastic stress model  

SciTech Connect (OSTI)

Mathematical models of heat flow and thermo-elastic stress, based on the finite-element method, have been developed and utilized to analyze the voidless,'' fused-cast, AZS, solidification process. The results of the mathematical analysis, in conjunction with information obtained in a comprehensive industrial study, presented in Part 1 of this paper, describe the mechanisms for the formation of the various crack types found in the fused-cast product. Thermal stresses are generated early in the solidification process by rapid cooling of the refractory surface as it contacts the initially cool mold and later in conjunction with the tetragonal-to-monoclinic phase transformation which occurs in the zirconia component of the AZS refractory. Applying this model, castings were made using a revised mold design. Preliminary results indicate these castings to be free of objectionable transverse cracks.

Cockcroft, S.L.; Brimacombe, J.K. (Univ. of British Columbia, Vancouver, British Columbia (Canada). Centre for Metallurgical Process Engineering); Walrod, D.G.; Myles, T.A. (Carborundum Co., Falconer, NY (United States). Monofrax-S Plant)

1994-06-01T23:59:59.000Z

387

MULTI-PHASE FRACTURE-MATRIX INTERACTIONS UNDER STRESS CHANGES  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multiphase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) quantifying the effect of confining stress on the distribution of fracture aperture, and (c) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress on the nature of the rock and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual descriptions of the process are shown in the report while detailed analysis of the behavior of the distribution of fracture aperture is in progress. Both extensional and shear fractures are being considered. The initial multi-phase flow tests were done in extensional fractures. Several rock samples with induced shear fracture are being studies, and some of the new results are presented in this report. These samples are being scanned in order to quantify the distribution of apertures and the nature of the asperities. Low resolution images of fluids in a sample with a shear fracture were performed and they provide the confidence that flow patterns and saturations could be determined in the future. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective is to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarado; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-06-15T23:59:59.000Z

388

Stress-tuned conductor-polymer composite for use in sensors  

DOE Patents [OSTI]

A method for making a composite polymeric material with electrical conductivity determined by stress-tuning of the conductor-polymer composite, and sensors made with the stress-tuned conductor-polymer composite made by this method. Stress tuning is achieved by mixing a miscible liquid into the polymer precursor solution or by absorbing into the precursor solution a soluble compound from vapor in contact with the polymer precursor solution. The conductor may or may not be ordered by application of a magnetic field. The composite is formed by polymerization with the stress-tuning agent in the polymer matrix. The stress-tuning agent is removed following polymerization to produce a conductor-polymer composite with a stress field that depends on the amount of stress-tuning agent employed.

Martin, James E; Read, Douglas H

2013-10-22T23:59:59.000Z

389

3D residual stress field in arteries: novel inverse method based on optical full-field measurements  

E-Print Network [OSTI]

-stretch and residual stresses arise in arteries largely due to the deposition of stable, highly elastic, elastin during1 3D residual stress field in arteries: novel inverse method based on optical full over time. This gives rise to residual stresses contributing to the homeostatic state of stress in vivo

Paris-Sud XI, Université de

390

Summary Effects of water stress on fruit fresh and dry weights were investigated in peach trees, Prunus persica (L.)  

E-Print Network [OSTI]

Summary Effects of water stress on fruit fresh and dry weights were investigated in peach trees of water stress increased with increasing crop load. Water stress induced fruit fresh weight reductions at all crop loads. Fruit dry weight was not reduced by water stress in trees having light to moderate

DeJong, Theodore

391

Numerical and experimental study of the thermal stress of silicon induced by a millisecond laser  

SciTech Connect (OSTI)

A spatial axisymmetric finite element model of single-crystal silicon irradiated by a 1064 nm millisecond laser is used to investigate the thermal stress damage induced by a millisecond laser. The transient temperature field and the thermal stress field for 2 ms laser irradiation with a laser fluence of 254 J/cm{sup 2} are obtained. The numerical simulation results indicate that the hoop stresses along the r axis on the front surface are compressive stress within the laser spot and convert to tensile stress outside the laser spot, while the radial stresses along the r axis on the front surface and on the z axis are compressive stress. The temperature of the irradiated center is the highest temperature obtained, yet the stress is not always highest during laser irradiation. At the end of the laser irradiation, the maximal hoop stress is located at r=0.5 mm and the maximal radial stress is located at r=0.76 mm. The temperature measurement experiments are performed by IR pyrometer. The numerical result of the temperature field is consistent with the experimental result. The damage morphologies of silicon under the action of a 254 J/cm{sup 2} laser are inspected by optical microscope. The cracks are observed initiating at r=0.5 mm and extending along the radial direction.

Wang Xi; Qin Yuan; Wang Bin; Zhang Liang; Shen Zhonghua; Lu Jian; Ni Xiaowu

2011-07-20T23:59:59.000Z

392

Effects of stress on microstructural evolution during irradiation  

SciTech Connect (OSTI)

Many theories have been postulated to describe irradiation creep but few have been supported with microstructural evidence. The purpose of this paper is to review microstructural studies of the effects of stress during irradiation in order to assess the validity of the available irradiation creep theories. Microstructural studies based on high voltage electron, ion, proton and neutron irradiation will be described, with major emphasis placed on interpreting behavior demonstrated in austenitic steels. Special attention will be given to work on fast neutron irradiated Nimonic PE16, a precipitation strengthened superalloy.

Gelles, D.S. [Pacific Northwest Lab., Richland, VA (United States)

1992-12-31T23:59:59.000Z

393

Stress Corrosion Crack Detection on HU-25 Guardian Aircraft  

SciTech Connect (OSTI)

Several ultrasonic inspection methods were developed at the Federal Aviation Administration's Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect hidden stress corrosion cracks in all vertical windshield posts on the US Coast Guard (USCG) HU-25 Guardian aircraft. The inspection procedure locates cracks as small as 2.0 millimeters emanating from internal fastener holes and determines their length. A test procedure was developed and a baseline assessment of the USCG fleet was conducted. Inspection results on twenty-five aircraft revealed a good correlation with results made during subsequent structural disassembly and visual inspection.

Blackmon, R.; Huffman, J.; Mello, C.W.; Moore, D.G.; Walkington, P.D.

1999-02-17T23:59:59.000Z

394

Oxidation induced stress-rupture of fiber bundles  

SciTech Connect (OSTI)

The effect of oxidation on the stress-rupture behavior of fiber bundles was modeled. It is shown that oxidation-induced fiber strength degradation results in the delayed failure of the associated fiber bundle and that the fiber bundle strength decreases with time as t{sup {minus}1/4}. It is also shown that the temperature dependence of the bundle loss of strength reflects the thermal dependence of the mechanism controlling the oxidation of the fibers. The effect of gauge length on the fiber bundle strength was also analyzed. Numerical examples are presented for the special case of Nicalon{trademark} fibers.

Lara-Curzio, E.

1997-03-01T23:59:59.000Z

395

DEVELOPMENT OF PLASTICITY MODEL USING NON ASSOCIATED FLOW RULE FOR HCP MATERIALS INCLUDING ZIRCONIUM FOR NUCLEAR APPLICATIONS  

SciTech Connect (OSTI)

In this report (prepared in collaboration with Prof. Jeong Whan Yoon, Deakin University, Melbourne, Australia) a research effort was made to develop a non associated flow rule for zirconium. Since Zr is a hexagonally close packed (hcp) material, it is impossible to describe its plastic response under arbitrary loading conditions with any associated flow rule (e.g. von Mises). As a result of strong tension compression asymmetry of the yield stress and anisotropy, zirconium displays plastic behavior that requires a more sophisticated approach. Consequently, a new general asymmetric yield function has been developed which accommodates mathematically the four directional anisotropies along 0 degrees, 45 degrees, 90 degrees, and biaxial, under tension and compression. Stress anisotropy has been completely decoupled from the r value by using non associated flow plasticity, where yield function and plastic potential have been treated separately to take care of stress and r value directionalities, respectively. This theoretical development has been verified using Zr alloys at room temperature as an example as these materials have very strong SD (Strength Differential) effect. The proposed yield function reasonably well models the evolution of yield surfaces for a zirconium clock rolled plate during in plane and through thickness compression. It has been found that this function can predict both tension and compression asymmetry mathematically without any numerical tolerance and shows the significant improvement compared to any reported functions. Finally, in the end of the report, a program of further research is outlined aimed at constructing tensorial relationships for the temperature and fluence dependent creep surfaces for Zr, Zircaloy 2, and Zircaloy 4.

Michael V. Glazoff; Jeong-Whan Yoon

2013-08-01T23:59:59.000Z

396

Phenotypic and genotypic characterization of white maize inbreds, hybrids and synthetics under stress and non-stress environments  

E-Print Network [OSTI]

……………………………………...……………………………… 94 3.4 Combined analysis of variance and means for grain yield and agronomic traits across low N stress environments……….…………………………………………… 99 3.5 Combined analysis of variance and means for grain yield and agronomic traits across optimal.... They also reported a significant gain of 9.4% for ears per plant and an increase in kernel number per fertile ear in early cycles of selection under drought conditions. Bolańos and Edmeades (1993a) further reported that about 25% of the gains that were...

Makumbi, Dan

2006-10-30T23:59:59.000Z

397

Stress dependent oxidation of sputtered niobium and effects on superconductivity  

SciTech Connect (OSTI)

We report on the suppression of room temperature oxidation of DC sputtered niobium films and the effects upon the superconductive transition temperature, T{sub c}. Niobium was sputter-deposited on silicon dioxide coated 150?mm wafers and permitted to oxidize at room temperature and pressure for up to two years. Resistivity and stress measurements indicate that tensile films greater than 400?MPa resist bulk oxidation with measurements using transmission electron microscope, electron dispersive X-ray spectroscopy, x-ray photoelectric spectroscopy, and secondary ion mass spectrometry confirming this result. Although a surface oxide, Nb{sub 2}O{sub 5}, consumed the top 6–10?nm, we measure less than 1 at. % oxygen and nitrogen in the bulk of the films after the oxidation period. T{sub c} measurements using a SQUID magnetometer indicate that the tensile films maintained a T{sub c} approaching the dirty superconductive limit of 8.4?K after two years of oxidation while maintaining room temperature sheet resistance. This work demonstrates that control over niobium film stress during deposition can prevent bulk oxidation by limiting the vertical grain boundaries ability to oxidize, prolonging the superconductive properties of sputtered niobium when exposed to atmosphere.

David Henry, M., E-mail: mdhenry@sandia.gov; Wolfley, Steve; Monson, Todd; Clark, Blythe G.; Shaner, Eric; Jarecki, Robert [Sandia National Labs, MESA Fabrication Facility PO Box 5800 MS 1084, Albuquerque, New Mexico 87185-1084 (United States)

2014-02-28T23:59:59.000Z

398

Graphite having improved thermal stress resistance and method of preparation  

DOE Patents [OSTI]

An improved method for fabricating a graphite article comprises the steps of impregnating a coke article by first heating the coke article in contact with a thermoplastic pitch at a temperature within the range of 250.degree.-300.degree. C. at a pressure within the range of 200-2000 psig for at least 4-10 hours and then heating said article at a temperature within the range of 450.degree.-485.degree. C. at a pressure of 200-2000 psig for about 16-24 hours to provide an impregnated article; heating the impregnated article for sufficient time to carbonize the impregnant to provide a second coke article, and graphitizing the second coke article. A graphite having improved thermal stress resistance results when the coke to be impregnated contains 1-3 wt.% sulfur and no added puffing inhibitors. An additional improvement in thermal stress resistance is achieved when the second coke article is heated above about 1400.degree. C. at a rate of at least 10.degree. C./minute to a temperature above the puffing temperature.

Kennedy, Charles R. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

399

In Situ Stress Measurements in the NPR Hole, Volume I - Results and Interpretations  

SciTech Connect (OSTI)

This report presents the results of an investigation of the magnitudes and orientations of the in situ stresses in basement rocks beneath the Savannah River Site (SRS). Stress magnitudes were measured using the hydraulic fracturing technique. Stress orientations were obtained from the orientation of stress-induced wellbore breakouts and hydraulically-induced fractures. The measurements reported here were carried out in the New Production Reactor (NPR) hole, drilled to a total depth of 4000 feet near the center of the Savannah River Site, at roughly the location of the proposed NPR. The results obtained in this study are compared to previous stress measurements made using the same techniques in a series of shallower holes on the SRS, and discussed in the context of the regional stress field and potential seismic hazard.

Moos, D.

2001-10-15T23:59:59.000Z

400

Shallow hydraulic fracturing measurements in Korea support tectonic and seismic indicators of regional stress.  

SciTech Connect (OSTI)

We have conducted five hydraulic fracturing stress measurement campaigns in Korea, involving 13 test holes ranging in depth from 30 to 250 m, at locations from North Seoul to the southern coast of the peninsula. The measurements reveal consistent crustal stress magnitudes and directions that suggest persistence throughout western and southern Korea. The maximum horizontal stress {sigma}{sub H} is oriented between ENE-WSW and E-W, in accord with plate movement and deformation, and with directions indicated by both focal mechanism solutions from earthquakes inland and offshore as well as borehole breakouts in mainland China close to its eastern coast. With respect to magnitudes, the vertical stress is the overall minimum stress at all tested locations, suggesting a thrust faulting regime within the relatively shallow depths reached by our tests. Typically, such a stress regime becomes one favoring strike-slip at greater depths, as is also indicated by the focal mechanism solutions around Korea.

Haimson, Bezalel Cecil (University of Wisconsin, Madison, WI); Lee, Moo Yul; Song, I. (Ruhr-University Bochum, Bochum, Germany)

2003-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown  

E-Print Network [OSTI]

Thermomechanical processes such as fatigue and shock have been suggested to cause and contribute to rock breakdown on Earth, and on other planetary bodies, particularly airless bodies in the inner solar system. In this study, we modeled grain-scale stresses induced by diurnal temperature variations on simple microstructures made of pyroxene and plagioclase on various solar system bodies. We found that a heterogeneous microstructure on the Moon experiences peak tensile stresses on the order of 100 MPa. The stresses induced are controlled by the coefficient of thermal expansion and Young's modulus of the mineral constituents, and the average stress within the microstructure is determined by relative volume of each mineral. Amplification of stresses occurs at surface-parallel boundaries between adjacent mineral grains and at the tips of pore spaces. We also found that microscopic spatial and temporal surface temperature gradients do not correlate with high stresses, making them inappropriate proxies for investig...

Molaro, Jamie L; Langer, Steve A

2015-01-01T23:59:59.000Z

402

Multi-Phase Fracture-Matrix Interactions Under Stress Changes  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multi-phase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) counter-current fluid transport between the matrix and the fracture, (c) studying the effect of confining stress on the distribution of fracture aperture and two-phase flow, and (d) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress, on the nature of the rock, and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual and detailed descriptions of the process are shown in the report. Both extensional and shear fractures have been considered. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective was to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering. A group of Shear fractures were studied, with layers perpendicular and parallel to the main axis of the sample. The structures of the fractures as well as their impact on absolute permeability and on oil displacement by water were evaluated. Shear fractures perpendicular to the layers lead to a wide distribution of pores and to an overall increase in absolute permeability. Shear fractures parallel to the layers lead to an overall increase in absolute permeability, but a decrease in displacement efficiency. This DoE project funded or partially funded three Ph.D. and four M.Sc. students at the Pennsylvania State University. The results from the research have yielded several abstracts, presentations and papers. Much of the work is still in the process of being published.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarao; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-12-07T23:59:59.000Z

403

Mono-textured nanocrystalline thin films with pronounced stress-gradients: On the role of grain boundaries in the stress evolution  

SciTech Connect (OSTI)

The origins of residual stress gradients in nanocrystalline thin films, especially the role of grain size and texture gradients, are still not fully understood. In this work, the stress evolution in exemplary nanocrystalline TiN thin films with one and two fiber texture components as well as in homogeneous amorphous SiO{sub x} films is analyzed using wafer curvature as well as laboratory and synchrotron cross-sectional nanobeam X-ray diffraction techniques. The stress evolution across the film thickness is attributed to the evolutionary nature of microstructural development at the individual growth stages. While the effect of the smooth crystallographic texture changes during growth is only of minor importance, as this does not significantly affect the dominant stress formation mechanisms, the change in the grain size accompanied by a change of the volume fraction of grain boundaries plays a decisive role in the stress development across the film thickness. This is demonstrated on the monotextured thin films, where the residual stresses scale with the apparent grain size. These findings are validated also by the investigations of stress profiles in homogeneous amorphous SiO{sub x} films exhibiting no grain boundaries.

Daniel, R., E-mail: Rostislav.Daniel@unileoben.ac.at; Mitterer, C. [Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben (Austria); Jäger, E.; Sartory, B. [Materials Center Leoben Forschung GmbH, Leoben (Austria); Todt, J.; Keckes, J. [Department of Materials Physics, Montanuniversität Leoben and Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben (Austria)

2014-05-28T23:59:59.000Z

404

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075  

SciTech Connect (OSTI)

The most critical stage in the heat treatment of high strength aluminium alloys is the rapid cooling necessary to form a supersaturated solid solution. A disadvantage of quenching is that the thermal gradients can be sufficient to cause inhomogeneous plastic deformation which in turn leads to the development of large residual stresses. Two 215 mm thick rectilinear forgings have been made from 7000 series alloys with widely different quench sensitivity to determine if solute loss in the form of precipitation during quenching can significantly affect residual stress magnitudes. The forgings were heat treated and immersion quenched using cold water to produce large magnitude residual stresses. The through thickness residual stresses were measured by neutron diffraction and incremental deep hole drilling. The distribution of residual stresses was found to be similar for both alloys varying from highly triaxial and tensile in the interior, to a state of biaxial compression in the surface. The 7010 forging exhibited larger tensile stresses in the interior. The microstructural variation from surface to centre for both forgings was determined using optical and transmission electron microscopy. These observations were used to confirm the origin of the hardness variation measured through the forging thickness. When the microstructural changes were accounted for in the through thickness lattice parameter, the residual stresses in the two forgings were found to be very similar. Solute loss in the 7075 forging appeared to have no significant effect on the residual stress magnitudes when compared to 7010. - Highlights: Black-Right-Pointing-Pointer Through thickness residual stress measurements made on large Al alloy forgings. Black-Right-Pointing-Pointer Residual stress characterised using neutron diffraction and deep hole drilling. Black-Right-Pointing-Pointer Biaxial compressive surface and triaxial subsurface residual stresses. Black-Right-Pointing-Pointer Quench sensitivity of 7075 promotes significant microstructural differences to 7010. Black-Right-Pointing-Pointer When precipitation is accounted for, residual stress in both forgings are similar.

Robinson, J.S., E-mail: jeremy.robinson@ul.ie [Materials and Surface Science Institute, University of Limerick (Ireland); Tanner, D.A. [Materials and Surface Science Institute, University of Limerick (Ireland); Truman, C.E. [Department of Mechanical Engineering, University of Bristol (United Kingdom); Paradowska, A.M. [ISIS Facility, Rutherford Appleton Laboratory, Didcot (United Kingdom); Wimpory, R.C. [Helmholtz Centre Berlin for Materials and Energy, Hahn Meitner Platz 1, Berlin (Germany)

2012-03-15T23:59:59.000Z

405

Mechanical properties of jammed packings of frictionless spheres under applied shear stress  

E-Print Network [OSTI]

By minimizing a thermodynamic-like potential, we unbiasedly sample the potential energy landscape of soft and frictionless spheres under constant shear stress. We obtain zero-temperature jammed states under desired shear stresses and investigate their mechanical properties as a function of the shear stress. As a comparison, we also obtain jammed states from the quasistatic-shear sampling in which the shear stress is not well-controlled. Although the yield stresses determined by both samplings show the same power-law scaling with the compression from point $J$, i.e.~the jamming transition point at zero temperature and shear stress, for finite size systems, the quasistatic-shear sampling leads to a lower yield stress and a higher critical volume fraction of point $J$. The shear modulus of jammed solids decreases when increasing the shear stress. However, the shear modulus does not decay to zero at yielding. This discontinuous change of the shear modulus implies the discontinuous nature of the unjamming transition under nonzero shear stress, which is further verified by the observation of a discontinuous jump of the pressure from jammed solids to shear flows. The pressure jump decreases upon decompression and approaches zero at the critical-like point $J$, in analogy with well-known phase transitions under external field. The analysis of force networks in jammed solids reveals that the force distribution is more sensitive to the increase of the shear stress near point $J$. The force network anisotropy increases with the shear stress. Weak particle contacts near the average force and under large shear stresses exhibit asymmetric angle distribution.

Hao Liu; Hua Tong; Ning Xu

2015-02-03T23:59:59.000Z

406

On the stress distribution in a thin rectangular plate subjected to shear  

E-Print Network [OSTI]

Average Stress, g difference in these Stresses, %max (Theoretica1) ) 'f max (Experimental), gmax (Exeter. ) vs g of C~ (Theo. ), ~rs. ~ 0 ~ ~ 0 Values of "+~" Ca1culated from ELemen- tary Beam Theory for Plate- (2 x 860) ~ ~ ~ ~ ~ /1 and Mrs t 1...) '( thin rectangu3. ar plate The theory of photoelasticity vas employed throughout the observations Ordinarily, it is assumed Chat such a shear stress is distributed uniformly over the section normal to the axis of the body~ in which case...

Travis, Darol Duane

2012-06-07T23:59:59.000Z

407

Induced alteration of the stomatal reponse to water stress in cotton  

E-Print Network [OSTI]

~n Cotton plants were grown both in a controlled environment. chamber and in the field. Some plants were allowed to develop iree of water stress while others were subjected to varying amounts of water stress. The stomatal response to water. stress...?af water potential, . Several reports in the literature sufgcst that the stomatos of fi. eld-grown plants react differently than those of plants grown in a controlled environment chamber. Turner and Begg (30) found that the leaf water potential...

Thomas, James Christian

1974-01-01T23:59:59.000Z

408

Electron paramagnetic resonance effect in nylon 6 in stress: the effect of additives  

E-Print Network [OSTI]

are ruptured free radicals are formed and. can be detected directjy. An electron paramagnetic resonance (EPR) spectrometer was employed to monitor the bonds broken in nylon 6 fibers in stress. Tests were conducted on essential+ pure nylon 6 fibers... paramagnetic resonance spectrum of nylon 6 in stress. Free radical concentration versus time at constant load for nylon 6. 22 Free radical decay in nylon 6 after removal of load. Electron paramagnetic resonance spectrum produced 'hy stressing nylon 6...

Cragar, Darryl Edward

2012-06-07T23:59:59.000Z

409

Onset of flow in a confined colloidal glass under an imposed shear stress  

E-Print Network [OSTI]

A confined colloidal glass, under the imposition of a uniform shear stress, is investigated using numerical simulations. Both at macro- and microscales, the consequent dynamics during the onset of flow is studied. When the imposed stress is gradually decreased, the time scale for the onset of steady flow diverges, associated with long-lived spatial heterogeneities. Near this yield-stress regime, persistent creep in the form of shear-banded structures is observed.

Pinaki Chaudhuri; Jürgen Horbach

2014-10-26T23:59:59.000Z

410

HYDRAULIC FRACTURING AND OVERCORING STRESS MEASUREMENTS IN A DEEP BOREHOLE AT THE STRIPA TEST MINE, SWEDEN  

E-Print Network [OSTI]

u l y 2 , 1 9 8 1 HYDRAULIC FRACTURING AND OVERCORING STRESSI nun LBL-12478 HYDRAULIC FRACTURING AND OVERCORING STRESSthe calculated stress. n HYDRAULIC FRACTURING EQUIPMENT AND

Doe, T.

2010-01-01T23:59:59.000Z

411

E-Print Network 3.0 - assisted stress corrosion Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to ductile crystalline metals 10,13. With respect to environmentally assisted fracture, stress-corrosion... rights reserved. Keywords: Metallic glass; Fatigue;...

412

E-Print Network 3.0 - aluminum stress signaling Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

joints with least stress singularities in dissimilar materials Summary: . External load was applied at the polycarbonate end and the aluminum end was fixed. A dynamic...

413

E-Print Network 3.0 - atypical transient stress-induced Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to acute challenges (Benschop et al., 1995). The importance of stress-induced... in response to a speech challenge task. Mills et al. convincingly show that acute ... Source:...

414

Psychological mechanisms of gender differences in social support use under stress  

E-Print Network [OSTI]

Use Under Stress by Britta Ann Larsen Doctor of Philosophyin Psychology by Britta Ann Larsen Committee in charge:Winkielman Copyright Britta Ann Larsen, 2011 All rights

Larsen, Britta Ann

2011-01-01T23:59:59.000Z

415

Mechanism of stress relaxation in Ge nanocrystals embedded in SiO2  

SciTech Connect (OSTI)

Ion-beam-synthesized {sup 74}Ge nanocrystals embedded in an amorphous silica matrix exhibit large compressive stresses in the as-grown state. The compressive stress is determined quantitatively by evaluating the Raman line shift referenced to the line position of free-standing nanocrystals. Post-growth thermal treatments lead to stress reduction. The stress relief process is shown to be governed by the diffusive flux of matrix atoms away from the local nanocrystal growth region. A theoretical model that quantitatively describes this process is presented.

Sharp, I.D.; Yi, D.O.; Xu, Q.; Liao, C.Y.; Beeman, J.W.; Liliental-Weber, Z.; Yu, K.M.; Zakharov, D.N.; Ager III, J.W.; Chrzan, D.C.; Haller, E.E.

2004-08-30T23:59:59.000Z

416

E-Print Network 3.0 - alcohol-induced oxidative stress Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Materials Science ; Physics 73 Hydralazine Rescues PC12 Cells From Acrolein-Mediated Death Summary: stress that eventually causes uncoupling of oxidative...

417

Analysis of stress sensitivity and its influence on oil production from tight reservoirs  

E-Print Network [OSTI]

and Its Influence on Oil Production from Tight Reservoirscan affect well oil production. Specifically, pressure-Stress Sensitivity on Oil Production During oil production

Lei, Qun; Xiong, Wei; Yuan, Cui; Wu, Yu-Shu

2008-01-01T23:59:59.000Z

418

Neutron scattering residual stress measurements on gray cast iron brake discs  

SciTech Connect (OSTI)

Neutron diffraction was used to investigate the effects of a heat treatment designed to remove internal residual stresses in brake discs. It is believed that residual stresses may change the rate of deformation of the discs during severe braking conditions when the disc temperature is increased significantly. Neutron diffraction was used to map out residual strain distributions in a production disc before and after a stress-relieving heat treatment. Results from these neutron diffraction experiments show that some residual strains were reduced by as much as 400 microstrain by stress relieving. 5 refs., 5 figs., 1 tab.

Spooner, S.; Payzant, E.A.; Hubbard, C.R. [and others

1996-11-01T23:59:59.000Z

419

E-Print Network 3.0 - ambient dehydration stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of 2.5 MPa and refilled. Dehydration... ). Stressed seg- ments were ... Source: Stiller, Volker - Department of Biological Sciences, Southeastern Louisiana University...

420

E-Print Network 3.0 - acute stress response Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

suggest that stress might have different effects on risk taking in males and females. Methodology... risk taking among men but decreased it among women. Conclusions...

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Effects of weld residual stresses on crack-opening area analysis of pipes for LBB applications  

SciTech Connect (OSTI)

This paper summarizes four different studies undertaken to evaluate the effects of weld residual stresses on the crack-opening behavior of a circumferential through-wall crack in the center of a girth weld. The effect of weld residual stress on the crack-opening-area and leak-rate analyses of a pipe is not well understood. There are no simple analyses to account for these effects, and, therefore, they are frequently neglected. The four studies involved the following efforts: (1) Full-field thermoplastic finite element residual stress analyses of a crack in the center of a girth weld, (2) A comparison of the crack-opening displacements from a full-field thermoplastic residual stress analysis with a crack-face pressure elastic stress analysis to determine the residual stress effects on the crack-opening displacement, (3) The effects of hydrostatic testing on the residual stresses and the resulting crack-opening displacement, and (4) The effect of residual stresses on crack-opening displacement with different normal operating stresses.

Dong, P.; Rahman, S.; Wilkowski, G. [and others

1997-04-01T23:59:59.000Z

422

E-Print Network 3.0 - alloy thermal stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

STRESSES DURING CASTING OF BINARY MAGNESIUM-ALUMINUM ALLOYS M.G. Pokorny1 , C... , Geesthacht, Germany Keywords: Magnesium Alloys, ... Source: Beckermann, Christoph - Department...

423

Stress and Fluid-Flow Interaction for the Coso Geothermal Field...  

Open Energy Info (EERE)

California is reliant on the knowledge of fluid flow directions associated with fracture networks. We use finite element analysis to establish the 3D state of stress within...

424

E-Print Network 3.0 - abnormal stress myocardial Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress myocardial Page: << < 1 2 3 4 5 > >> 1 Diastolic Dysfunction in Hypertensive Heart Disease Is Associated With Altered Myocardial Metabolism Summary: is altered at high...

425

E-Print Network 3.0 - adenosine stress cardiovascular Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

adenosine stress cardiovascular Page: << < 1 2 3 4 5 > >> 1 Adenosine does not save the heart of anoxia-tolerant vertebrates during prolonged oxygen deprivation Summary: during...

426

E-Print Network 3.0 - adenosine stress echocardiography Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for: adenosine stress echocardiography Page: << < 1 2 3 4 5 > >> 1 Kentucky Children's Heart Center Summary: Academy of Pediatrics. Dr. Cumbermack's interests include fetal...

427

E-Print Network 3.0 - applied stress measurements Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sample search results for: applied stress measurements Page: << < 1 2 3 4 5 > >> 1 Mechanical Engineering Department 22 January 2010 Summary: magnitudes for all choices of...

428

Determination of the effective stress law for permeability and deformation in low-permeability rocks  

SciTech Connect (OSTI)

This paper reports that laboratory experiments were performed to determine the effective stress law of tight sandstones and chalk for permeability and deformation. Permeability and volumetric strain data were taken at various stresses and pore pressures and were analyzed with a statistical model-building approach. Results show that the effective stress laws for both processes are variable with stress and pressure, depend on the material, and do not agree well with present theories. This may be applied for a greater understanding of oil reservoir formations.

Warpinski, N.R.; Teufel, L.W. (Sandia National Lab. (US))

1992-06-01T23:59:59.000Z

429

Analysis of stress sensitivity and its influence on oil production from tight reservoirs  

E-Print Network [OSTI]

indicate that low-permeability tight oil reservoirs arepermeability cores Effect of Stress Sensitivity on Oil Production During oil production from tight

Lei, Qun; Xiong, Wei; Yuan, Cui; Wu, Yu-Shu

2008-01-01T23:59:59.000Z

430

abiotic acibenzolar-s-methyl stresses: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The macroscopic stress evolution is connected to a length scale of residual liquefaction displayed by microscopic mean-squared displacements. The theory describes this...

431

Wave propagation, stress relaxation, and grain-to-grain shearing in saturated, unconsolidated marine sediments  

E-Print Network [OSTI]

Wave propagation, stress relaxation, and grain-to-grain shearing in saturated, unconsolidated in saturated, unconsolidated granular materials, including marine sediments, is developed in this article

Buckingham, Michael

432

E-Print Network 3.0 - acid-induced stress resistance Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science ; Engineering 13 Evidence for a Role of Salicylic Acid in the Oxidative Damage Generated by NaCl and Osmotic Stress in Summary: , Muszynska G, Klessig DF,...

433

E-Print Network 3.0 - alleviates er stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(Reviewed... and cytokinin, had some benefits in alleviating the adverse effects of salt stress. ABA is involved in many... , are glycophytes and cannot tolerate high salinity....

434

Errors induced in triaxial stress tensor calculations using incorrect lattice parameters  

SciTech Connect (OSTI)

A number of researchers have proposed that for some metallic alloys, an elaborate procedure is necessary in order to improve the accuracy of the measured triaxial stress tensor. Others have been concerned that the uncertainties in establishing the precise zero-stress lattice parameter of an alloyed and/or cold worked engineering metal could cause significantly more error than would result in ignoring the triaxial stress state and assuming the plane stress condition. This paper illustrates the effect of uncertainties in the zero-stress lattice parameters on the calculated triaxial stress state for zero stress powders of three common engineering alloys, i.e., 1010 steel, 304 stainless steel, and 2024 aluminum. Also, errors due to the incorrect lattice spacing in experimental stress analysis are presented for three examples, i.e., a silicon powder, 304 gainless steel cylinder and a diamond. For cases where the plane strain assumption is justified, the uncertainties due to the stress free lattice parameter can be reduced by a simple measurement.

Ruud, C.O. [Pennsylvania State Univ., University Park, PA (United States). Materials Research Lab.; Kozaczek, K.J. [Oak Ridge National Lab., TN (United States)

1994-06-01T23:59:59.000Z

435

Maximum Entropy and the Stress Distribution in Soft Disk Packings Above Jamming  

E-Print Network [OSTI]

We show that the maximum entropy hypothesis can successfully explain the distribution of stresses on compact clusters of particles within disordered mechanically stable packings of soft, isotropically stressed, frictionless disks above the jamming transition. We show that, in our two dimensional case, it becomes necessary to consider not only the stress but also the Maxwell-Cremona force-tile area, as a constraining variable that determines the stress distribution. The importance of the force-tile area was suggested by earlier computations on an idealized force-network ensemble.

Yegang Wu; S. Teitel

2014-10-17T23:59:59.000Z

436

Analysis of stress sensitivity and its influence on oil production from tight reservoirs  

E-Print Network [OSTI]

low-permeability tight oil reservoirs are inadvisable to beconditions, to study tight oil reservoir stress sensitivity.oil production from tight oil reservoirs, in addition to

Lei, Qun; Xiong, Wei; Yuan, Cui; Wu, Yu-Shu

2008-01-01T23:59:59.000Z

437

E-Print Network 3.0 - aluminum stress induces Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: the interaction is maximal. For many systems, including aluminum alloys, the flow stress is however considered... Equation Chapter 4 Section 1Chapter 4...

438

A New Coal-Permeability Model: Internal Swelling Stress and Fracture–Matrix Interaction  

E-Print Network [OSTI]

L. : Adsorption-induced coal swelling and stress:acid gas sequestration into coal seams. J Geophys. Res. (fracturing on permeability of coal. Min. Sci. Technol. 3,

Liu, Hui-Hai; Rutqvist, Jonny

2010-01-01T23:59:59.000Z

439

A new coal-permeability model: Internal swelling stress and fracture-matrix interaction  

E-Print Network [OSTI]

of carbon dioxide in coal with enhanced coalbed methaneL. Adsorption-induced coal swelling and stress: Implicationsand acid gas sequestration into coal seams. J Geophys Res. (

Liu, H.H.

2010-01-01T23:59:59.000Z

440

MULTI-PHASE FRACTURE-MATRIX INTERACTIONS UNDER STRESS CHANGES  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multiphase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (1) developing the direct experimental measurements of fracture aperture and topology using high-resolution x-ray microtomography, (2) modeling of fracture permeability in the presence of asperities and confining stress, and (3) simulation of two-phase fluid flow in a fracture and a layered matrix. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. The distribution of fracture aperture is a difficult issue that we are studying and developing methods of quantification. The difficulties are both numerical and conceptual. Numerically, the three-dimensional data sets include millions, and sometimes, billions of points, and pose a computational challenge. The conceptual difficulties derive from the rough nature of the fracture surfaces, and the heterogeneous nature of the rock matrix. However, the high-resolution obtained by the imaging system provides us a much needed measuring environment on rock samples that are subjected to simultaneous fluid flow and confining stress. Pilot multi-phase experiments have been performed, proving the ability to detect two phases in certain large fractures. The absolute permeability of a fracture depends on the behavior of the asperities that keep it open. A model is being developed that predicts the permeability and average aperture of a fracture as a function of time under steady flow of water including the pressure solution at the asperity contact points. Several two-phase flow experiments in the presence of a fracture tip were performed in the past. At the present time, we are developing an inverse process using a simulation model to understand the fluid flow patterns in the presence of a fracture, and the interactions between fluid flow in the fracture and the adjacent matrix. Preliminary results demonstrate that the flow patterns are significantly impacted by the presence of the fracture. Bypassing is quantified and we expect to be able to extract from the modeling the distribution of properties in the fracture and the adjacent matrix.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarado; H. Yasuhara; A. Alajmi; Z. Karpyn

2002-10-28T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Simulation and analysis of Magnetically-Applied Pressure-Shear (MAPS) experiments.  

SciTech Connect (OSTI)

A new experimental technique to measure material shear strength at high pressures has been developed for use on magnetohydrodynamic (MHD) drive pulsed power platforms. The technique is referred to as Magnetically-Applied Pressure-Shear (MAPS). By applying an external static magnetic field to the sample region, the MHD drive directly induces a shear stress wave in addition to the usual longitudinal stress wave. Strength is probed by passing this shear wave through a sample material where the transmissible shear stress is limited to the sample strength. The magnitude of the transmitted shear wave is measured via a transverse velocity interferometry system (VISAR) from which the sample strength is determined. The strength of materials is defined as the ability of a material to sustain deviatoric (shear) stresses. Strength is an important aspect of the response of materials subjected to compression to high pressure. Beyond the elastic response, material strength will govern at what pressure and to what extent a material will plastically deform. The MAPS technique cleverly exploits the property that, for a von Mises yield criterion at a given longitudinal stress, the maximum amplitude shear wave that can be transmitted is limited by the strength at that stress level. Successful fielding of MAPS experiments to measure shear stresses relies upon correct numerical simulation of the experiment. Complex wave interactions among forward and reflected longitudinal and shear waves, as well as the advancing magnetic diffusion front of the MHD drive, can make the design of the experiment complicated. Careful consideration must be given to driver, sample, and anvil materials; to the thicknesses of the driver, sample and anvil layers; as well as to the timing of the interacting waves. This paper will present and analyze the 2D MHD simulations used to design the MAPS experiments. The MAPS experiments are modeled using Sandia's ALEGRA-MHD simulation code. ALEGRA-MHD is an operator-split, multi-physics, multi-material, arbitrary lagrangian-eulerian code developed to model magnetic implosion, ceramic fracture, and electromagnetic launch. We will detail the numerical investigations into MHD shear generation, longitudinal and shear stress coupling, timing of wave interactions, and transmission of shear at material interfaces.

Haill, Thomas A.; Alexander, C. Scott; Asay, James Russell

2011-06-01T23:59:59.000Z

442

Creep and Fracture of a Protein Gel under Stress  

E-Print Network [OSTI]

Biomaterials such as protein or polysaccharide gels are known to behave qualitatively as soft solids and to rupture under an external load. Combining optical and ultrasonic imaging to shear rheology we show that the failure scenario of a protein gel is reminiscent of brittle solids: after a primary creep regime characterized by a power-law behavior which exponent is fully accounted for by linear viscoelasticity, fractures nucleate and grow logarithmically perpendicularly to shear, up to the sudden rupture of the gel. A single equation accounting for those two successive processes nicely captures the full rheological response. The failure time follows a decreasing power law with the applied shear stress, similar to the Basquin law of fatigue for solids. These results are in excellent agreement with recent fiber-bundle models that include damage accumulation on elastic fibers and exemplify protein gels as model, brittle-like soft solids.

Mathieu Leocmach; Christophe Perge; Thibaut Divoux; Sébastien Manneville

2014-08-19T23:59:59.000Z

443

Photoelastic stress analysis on a Phoenix 7. 9-meter blade  

SciTech Connect (OSTI)

Photoelastic tests were conducted on the Phoenix 7.9-meter blade to develop the basic methodology for locating critical strain areas on full-scale composite structures. Under relatively low elastic loading the strain fields over various regions on the blade planform were documented with 35mm photographs under different loading conditions at the Solar Energy Research Institute (SERI) Structural Test Facility (STF). Strain concentrations were easily located and quantified. Principal strain magnitudes and directions were determined at the highest strain areas using separator gages. Results were compared to measured operating loads. This experiment demonstrated the value of experimental stress analysis using the photoelastic technique for the evaluation of composite blade designs. 9 refs., 6 figs., 3 tabs.

Musial, W.D.; Jenks, M.D.; Osgood, R.M.; Johnson, J.A.

1991-10-01T23:59:59.000Z

444

Mechanical Properties of Gels; Stress from Confined Fluids  

SciTech Connect (OSTI)

Abstract for Grant DE-FG02-97ER45642 Period: 1997-2002 Mechanical Properties of Gels 2002-2008 Stress from Confined Fluids Principal investigator: Prof. George W. Scherer Dept. Civil & Env. Eng./PRISM Eng. Quad. E-319 Princeton, NJ 08544 USA Recipient organization: Trustees of Princeton University 4 New South Princeton, NJ 08544 USA Abstract: The initial stage of this project, entitled Mechanical Properties of Gels, was dedicated to characterizing and explaining the properties of inorganic gels. Such materials, made by sol-gel processing, are of interest for fabrication of films, fibers, optical devices, advanced insulation and other uses. However, their poor mechanical properties are an impediment in some applications, so understanding the origin of these properties could lead to enhanced performance. Novel experimental methods were developed and applied to measure the stiffness and permeability of gels and aerogels. Numerical simulations were developed to reproduce the growth process of the gels, resulting in structures whose mechanical properties matched the measurements. The models showed that the gels are formed by the growth of relatively robust clusters of molecules that are joined by tenuous links whose compliance compromises the stiffness of the structure. Therefore, synthetic methods that enhance the links could significantly increase the rigidity of such gels. The next stage of the project focused on Stress from Confined Fluids. The first problem of interest was the enhanced thermal expansion coefficient of water that we measured in the nanometric pores of cement paste. This could have a deleterious effect on the resistance of concrete to rapid heating in fires, because the excessive thermal expansion of water in the pores of the concrete could lead to spalling and collapse. A series of experiments demonstrated that the expansion of water increases as the pore size decreases. To explain this behavior, we undertook a collaboration with Prof. Stephen Garofalini (Rutgers), who has developed the best simulations of water ever reported by use of molecular dynamics. Simulated heating of water in small pores provided quantitative agreement with experiments, and showed that the origin of the high expansion is the altered structure of water in the first two molecular layers adjacent to the pore wall. The final focus of the project was to understand the damage done by crystals growing in small pores. For example, the primary cause of damage to ancient monuments in the Mediterranean Basin is growth of salt crystals in the pores of the stone. Salt may enter stone as a result of capillary rise of groundwater, by leaching of mortar joints, deposition of marine spray, or reactions with atmospheric pollutants (such as oxides of nitrogen or sulfur). As the water evaporates, the salt solution becomes supersaturated and crystals precipitate. Stress results, because the salt usually repels the minerals in the pore walls. Our goal was to identify the factors contributing to the repulsion, so that we could develop a chemical treatment to reduce the repulsion and hence the stress. (We have recently demonstrated an effective treatment as part of a separately funded study.) In collaboration with Prof. Garofalini, molecular dynamics simulations have been done that correctly reproduce the structure of water around dissolved ions of sodium and chloride. We simulated the interaction between crystals of sodium chloride and quartz, and found that this particular system exhibits attractive forces, in agreement with experiment. The origin of the attraction is the orientation of dipolar water molecules near the surfaces of the crystals. Similar calculations now must be done in systems, such as potassium chloride and quartz, where the interaction is repulsive. This grant supported the education of two doctoral students, Hang-Shing Ma (Ph.D., 2002) and Melanie Webb (Ph.D. expected 2010), three post-doctoral researchers, Joachim Gross, Gudrun Reichenauer, and Shuangyan (Sonia) Xu, and five undergraduates (for senior theses or independent projects

George W. Scherer

2009-12-01T23:59:59.000Z

445

Gels under stress: the origins of delayed collapse  

E-Print Network [OSTI]

Attractive colloidal particles can form a disordered elastic solid or gel when quenched into a two-phase region, if the volume fraction is sufficiently large. When the interactions are comparable to thermal energies the stress-bearing network within the gel restructures over time as individual particle bonds break and reform. Typically, under gravity such weak gels show a prolonged period of either no or very slow settling, followed by a sudden and rapid collapse - a phenomenon known as delayed collapse. The link between local bond breaking events and the macroscopic process of delayed collapse is not well understood. Here we summarize the main features of delayed collapse and discuss the microscopic processes which cause it. We present a plausible model which connects the kinetics of bond breaking to gel collapse and test the model by exploring the effect of an applied external force on the stability of a gel.

Lisa J. Teece; James M. Hart; Kerry Yen Ni Hsu; Stephen Gilligan; Malcolm A. Faers; Paul Bartlett

2014-03-12T23:59:59.000Z

446

Overpressure prediction by mean total stress estimate using well logs for compressional environments with strike-slip or reverse faulting stress state  

E-Print Network [OSTI]

of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 2006 Major Subject: Petroleum Engineering OVERPRESSURE PREDICTION BY MEAN TOTAL STRESS ESTIMATE USING WELL LOGS... FOR COMPRESSIONAL ENVIRONMENTS WITH STRIKE-SLIP OR REVERSE FAULTING STRESS STATE A Thesis by ASLIHAN OZKALE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

Ozkale, Aslihan

2007-04-25T23:59:59.000Z

447

Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.  

DOE Patents [OSTI]

Embodiments include a method for forming a glass which displays visible cracking prior to failure when subjected to predetermined stress level that is greater than a predetermined minimum stress level and less than a failure stress level. The method includes determining a critical flaw size in the glass and introducing a residual stress profile to the glass so that a plurality of visible cracks are formed prior to failure when the glass is subjected to a stress that is greater than the minimum stress level and lower than the critical stress. One method for forming the residual stress profile includes performing a first ion exchange so that a first plurality of ions of a first element in the glass are exchanged with a second plurality of ions of a second element that have a larger volume than the first ions. A second ion exchange is also performed so that a plurality of the second ions in the glass are exchanged back to ions of the first element.

Green, David J. (State College, PA); Sglavo, Vincenzo M. (Roncegno, IT); Tandon, Rajan (Fremont, CA)

2003-02-11T23:59:59.000Z

448

A finite element analysis of shrinkage stress fields in two-phase materials  

E-Print Network [OSTI]

denote stress, temperature and moisture respectively, and a is a time shift oTm factor. The kernel functions g , g and g , depend upon stress and 0' 1 environment. In the linear case DD is the instantaneous creep compliance and LD(t) defines time...

Hall, Frank

1980-01-01T23:59:59.000Z

449

Processing Effects for Integrated PZT: Residual Stress, Thickness, and Dielectric Properties  

E-Print Network [OSTI]

Processing Effects for Integrated PZT: Residual Stress, Thickness, and Dielectric Properties Ryan J (PZT) films integrated onto Pt/Ti/SiO2//Si substrates are reported. Sol­gel synthesis and deposition orientation (nominally (111) fiber tex- tured), and measured residual stress. The Stoney method, using laser

Sottos, Nancy R.

450

NONLINEAR SAW PROPAGATION IN THIN-FILM SYSTEMS WITH RESIDUAL STRESS* R. E. Kumon  

E-Print Network [OSTI]

harmonics. I. INTRODUCTION AND MOTIVATION The thin-film deposition process can create large residualNONLINEAR SAW PROPAGATION IN THIN-FILM SYSTEMS WITH RESIDUAL STRESS* R. E. Kumon National Institute is the residual stress. The effective elas- tic constants and density are given by Ceff ijkl = Cijkl(1 - eres

451

STRESS-DENSITY VARIATIONS IN ALUMINA SEDIMENTS: EFFECTS OF POLYMER CHEMISTRY  

E-Print Network [OSTI]

151 STRESS-DENSITY VARIATIONS IN ALUMINA SEDIMENTS: EFFECTS OF POLYMER CHEMISTRY C. H. SCHILLING present a novel approach for analyzing sediments by gamma-ray densitometry 1 and a fluid mechanics model.g., rheometry, sedimentation kinetics modeling, soil mechanics tests), especially for the low stresses (

Aksay, Ilhan A.

452

An Experimental/Computational Approach to Identify Moduli and Residual Stress  

E-Print Network [OSTI]

and uniformity of measured load­deflection curves on a number of switches with both wedge and Berkovich tips has a strong effect on load­ deflection curves; hence, its accurate characterization is crit- ical stress state affect the load­deflection curve in dif- ferent regimes. Changes in residual stress state

Espinosa, Horacio D.

453

Stress-corrosion fatiguecrack growth in a Zr-based bulk amorphous metal  

E-Print Network [OSTI]

Stress-corrosion fatigue­crack growth in a Zr-based bulk amorphous metal V. Schroeder 1 , R metallic glass; Amorphous metal; Fatigue; Stress corrosion; Crack growth 1. Introduction In recent years­crack growth resistance [1­5], its corresponding properties in the presence of a corrosive environment have

Ritchie, Robert

454

Final Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress  

SciTech Connect (OSTI)

This paper outlines the technology need for a rock formation stress measurement in future EGS wells. This paper reports on the results of work undertaken under a Phase I, DOE/SBIR on the feasibility to build an acoustic well logging tool for measuring rock formation stress.

Normann, Randy A.

2014-12-01T23:59:59.000Z

455

Stress analysis of the HFIR HB-2 and HB-3 beam tube nozzles  

SciTech Connect (OSTI)

The results of three-dimensional linear elastic stress analyses of the HFIR HB-2 and HB-3 nozzles are presented in this report. Finite element models were developed using the PATRAN pre-processing code and translated into ABAQUS input file format. A scoping analysis using simple geometries with internal pressure loading was carried out to assess the capabilities of the ABAQUS/Standard code to calculate maximum principal stress distributions within cylinders with and without holes. These scoping calculations were also used to provide estimates for the variation in tangential stress around the rim of a nozzle using the superposition of published closed-form solutions for the stress around a hole in an infinite flat plate under uniaxial tension. From the results of the detailed finite element models, peak stress concentration factors (based on the maximum principal stresses in tension) were calculated to be 3.0 for the HB-2 nozzle and 2.8 for the HB-3 nozzle. Submodels for each nozzle were built to calculate the maximum principal stress distribution in the weldment region around the nozzle, where displacement boundary conditions for the submodels were automatically calculated by ABAQUS using the results of the global nozzle models. Maximum principal stresses are plotted and tabulated for eight positions around each nozzle and nozzle weldment.

Williams, P.T.

1998-08-01T23:59:59.000Z

456

Characterization of the Bat proteins in the oxidative stress response of Leptospira biflexa  

E-Print Network [OSTI]

Characterization of the Bat proteins in the oxidative stress response of Leptospira biflexa Stewart;RESEARCH ARTICLE Open Access Characterization of the Bat proteins in the oxidative stress response , Mathieu Picardeau4 and Patricia A Rosa1 Abstract Background: Leptospires lack many of the homologs

Paris-Sud XI, Université de

457

High-temperature stress measurement on chemical-vapor-deposited tungsten silicide and tungsten films  

SciTech Connect (OSTI)

Stresses in chemical-vapor-deposited tungsten silicide and tungsten films at high temperatures were measured. Tungsten silicide films were formed from WF/sub 6/ and SiH/sub 4/ or Si/sub 2/H/sub 6/. Tungsten films were formed from WF/sub 6/ and H/sub 2/. The stress in tungsten silicide films is tensile and in the order of 10/sup 9/--10/sup 10/ dynes/cm/sup 2/. For a composition ratio of Si/Wless than or equal to2.6, the stress of a film of more than 1000 A has a maximum at about 500 /sup 0/C. On the other hand, for a composition Si/W>2.9, the stress has no maximum. The maximum of the stress is caused by crystallization of the film. The stress has two components. One component is related to the difference of the thermal expansion coefficients between the film and the Si substrate. Another is related to the film crystallization. It was found that the stress concentrates in the portion of the film nearest the substrate. The stress in tungsten films also reaches a maximum at 550 /sup 0/C, similar to the tungsten silicide films. However, the cause of this behavior is not clear.

Shioya, Y.; Ikegami, K.; Maeda, M.; Yanagida, K.

1987-01-15T23:59:59.000Z

458

Hot tearing test for TIG welding of aluminum alloys: application of a stress parallel to the  

E-Print Network [OSTI]

Page 1 Hot tearing test for TIG welding of aluminum alloys: application of a stress parallel in aluminum alloys welding is an important industrial issue. Understanding of hot cracking phenomenon welding. The originality of the test presented here is that an external stress is applied on the test

Paris-Sud XI, Université de

459

Personality variables and reaction to stress in long vs. short sleepers  

E-Print Network [OSTI]

) Sleep Group (8) Control 5. 4735 (1) Short 6. 4167 Means LZZ Stress 6. 7302 (2) Medium 5. 9603 (3) Long 5. 9286 (A) (1) Control (2) Stress (8) ~iShort 5. 5000 7. 3333 (2) Medio ~hto 5. 7778 5. 1429 6. 1429 6. 7143 28 Table 16 T...

Leonard, Angela Harman

1977-01-01T23:59:59.000Z

460

Characterising nutrient-induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella emersonii (Chlorophyta)  

E-Print Network [OSTI]

Characterising nutrient-induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella nutrient- induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella emersonii (Chlorophyta-starvation in batch cultures of the freshwater chlorophyte Chlorella emersonii was followed and the NIFT responses

McCarthy, T.K.

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Stress state of diamond and gold under nonhydrostatic compression Jianghua Wang,1  

E-Print Network [OSTI]

for the polycrystalline gold under the highest load. Polycrystalline diamond can support a microscopic deviatoric stress of polycrystalline diamond and gold in the DAC under nonhydrostatic compression to above 300 GPa. The influenceStress state of diamond and gold under nonhydrostatic compression to 360 GPa Jianghua Wang,1

Duffy, Thomas S.

462

Moleculardynamics simulation of thermal stress at the (100) diamond/substrate interface: effect of film continuity  

E-Print Network [OSTI]

with the development of advanced CVD techniques 2 producing polycrystalline diamond of quality approachingMolecular­dynamics simulation of thermal stress at the (100) diamond/substrate interface: effect at the (100) diamond/substrate interface. The stress­induced binding energy reduction obtained

Adler, Joan

463

Ultrasonic measurement of the residual stresses in patch welded steel plates  

E-Print Network [OSTI]

, structural steel plates. The two 1.2 in (48 in.) square plates were patch welded in the center to create a residual stress field; and subsequently, one of the plates was stress relieved. The LCR travel-time measurements on the plates not only differentiated...

Junghans, Paul Gerard

1994-01-01T23:59:59.000Z

464

Stress generation during lithiation of high-capacity electrode particles in lithium ion batteries  

E-Print Network [OSTI]

Stress generation during lithiation of high-capacity electrode particles in lithium ion batteries S in controlling stress generation in high-capacity electrodes for lithium ion batteries. Ă? 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Keywords: Lithium ion battery; Lithiation

Zhu, Ting

465

MODELING SOLIDIFICATION-INDUCED STRESSES IN CERAMIC WASTE FORMS CONTAINING NUCLEAR WASTES  

SciTech Connect (OSTI)

The goal of this work is to produce a ceramic waste form (CWF) that permanently occludes radioactive waste. This is accomplished by absorbing radioactive salts into zeolite, mixing with glass frit, heating to a molten state 915 C to form a sodalite glass matrix, and solidifying for long-term storage. Less long term leaching is expected if the solidifying cooling rate doesn’t cause cracking. In addition to thermal stress, this paper proposes that a stress is formed during solidification which is very large for fast cooling rates during solidification and can cause severe cracking. A solidifying glass or ceramic cylinder forms a dome on the cylinder top end. The temperature distribution at the time of solidification causes the stress and the dome. The dome height, “the length deficit,” produces an axial stress when the solid returns to room temperature with the inherent outer region in compression, the inner in tension. Large tensions will cause cracking of the specimen. The temperature deficit, derived by dividing the length deficit by the coefficient of thermal expansion, allows solidification stress theory to be extended to the circumferential stress. This paper derives the solidification stress theory, gives examples, explains how to induce beneficial stresses, and compares theory to experimental data.

Charles W. Solbrig; Kenneth J. Bateman

2010-11-01T23:59:59.000Z

466

Impact of Friction and Scale-Dependent Initial Stress on Radiated Energy-Moment Scaling  

E-Print Network [OSTI]

. Shaw Lamont­Doherty Earth Observatory, Columbia University, New York, USA The radiated energy coming271 Impact of Friction and Scale-Dependent Initial Stress on Radiated Energy-Moment Scaling Bruce E of elucidat- ing their radiated energy-moment scaling. We find, contrary to expectations, that apparent stress

Shaw, Bruce E.

467

Magnesium and titanium: "The odd couple" Local order and the influence of stress on the  

E-Print Network [OSTI]

Magnesium and titanium: "The odd couple" Local order and the influence of stress on the hydrogen (Sweden) Cover: The graph on the cover is a collection of loading isotherms measured on magnesium thin UNIVERSITEIT Magnesium and titanium: "The odd couple" Local order and the influence of stress on the hydrogen

Dam, Bernard

468

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys  

E-Print Network [OSTI]

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys M.G. POKORNY, C.A. MONROE properties that are suitable for advanced stress modeling is even more limited for magnesium alloys. Recently of an AZ91 magnesium alloy in order to predict hot tears.[4] This study relied on crude estimates

Beckermann, Christoph

469

, J. Geophys. Res., 103, 24469-24486 Stress Coupling Between Earthquakes in Northwest Turkey  

E-Print Network [OSTI]

, J. Geophys. Res., 103, 24469-24486 Stress Coupling Between Earthquakes in Northwest Turkey, Istanbul, Turkey Aurélia Hubert and Geoffrey C. P. King Laboratoire de Tectonique et Mécanique de la stress interactions of 29 earthquakes (Ms 6.0) that have occurred in the region of northwest Turkey

Hubert-Ferrari, Aurélia

470

Effective stress profiles and seepage flows beneath glaciers and ice sheets  

E-Print Network [OSTI]

stress for ice infiltration Qb Heat flux into glacier base Qf Heat produced by dissipation Qg GeothermalEffective stress profiles and seepage flows beneath glaciers and ice sheets Alan W. REMPEL spacing and the heat-flow regime. Considerations of thermodynamic equilibrium require that ice penetrates

Rempel, Alan W.

471

Europe, Cutting Biofuel Subsidies, Redirects Aid to Stress Greenest Options -New York Times January 22, 2008  

E-Print Network [OSTI]

Europe, Cutting Biofuel Subsidies, Redirects Aid to Stress Greenest Options - New York Times January 22, 2008 Europe, Cutting Biofuel Subsidies, Redirects Aid to Stress Greenest Options By ELISABETH for biofuels, acknowledging that the environmental benefits of these fuels have often been overstated

472

High-throughput analysis of thin-film stresses using arrays of micromachined cantilever beams  

E-Print Network [OSTI]

High-throughput analysis of thin-film stresses using arrays of micromachined cantilever beams Hyun-throughput residual stress measurements on thin films by means of micromachined cantilever beams and an array of parallel laser beams. In this technique, the film of interest is deposited onto a silicon substrate

473

Stress-wave velocity of wood-based panels: Effect of moisture,  

E-Print Network [OSTI]

for wood-based panel products. In the forest products industry, nondestructive evaluation (NDE) technology, Ross and Pellerin 1994). One NDE technique, which uses stress-wave propagation characteristics, has received considerable atten- tion. Stress-wave-based NDE techniques have been investi- gated extensively

474

Stream habitat and rainbow trout (Oncorhynchus mykiss) physiological stress responses to  

E-Print Network [OSTI]

Stream habitat and rainbow trout (Oncorhynchus mykiss) physiological stress responses to streamside and sedimentation, loss of habitat complexity) are potentially stressful to stream-dwelling fish. We examined stream Columbia using 15 streams divided into three categories: old growth (reference), recently logged (clear

Hinch, Scott G.

475

Cavitation and the state of stress in a flowing liquid Daniel D. Joseph  

E-Print Network [OSTI]

Cavitation and the state of stress in a flowing liquid Daniel D. Joseph University of Minnesota The problem of the inception of cavitation is formulated in terms of a compar- ison of the breaking strength or cavitation threshold at each point of a liquid sam- ple with the principal stresses there. A criterion

Joseph, Daniel D.

476

Cavitation and the state of stress in a flowing liquid Daniel D. Joseph  

E-Print Network [OSTI]

Cavitation and the state of stress in a flowing liquid Daniel D. Joseph University of Minnesota The problem of the inception of cavitation is formulated in terms of a compar­ ison of the breaking strength or cavitation threshold at each point of a liquid sam­ ple with the principal stresses there. A criterion

Joseph, Daniel D.

477

Study of the effect of the stress on CdTe nuclear detectors  

SciTech Connect (OSTI)

CdTe detectors are commonly used for X and ? ray applications. The performance of these detectors is strongly affected by different types of mechanical stress; such as that caused by differential expansion between the semiconductor and its intimate metallic contacts and that caused by applied pressure during the bonding process. The aim of this work was to study the effects of stress on the performance of CdTe detectors. A difference in expansion coefficients induces transverse stress under the metallic contact, while contact pressure induces longitudinal stress. These stresses have been simulated by applying known static pressures. For the longitudinal case, the pressure was applied directly to the metallic contact; while in the transverse case, it was applied to the side. We have studied the effect of longitudinal and transverse stresses on the electrical characteristics including leakage current measurements and ?-ray detection performance. We have also investigated induced defects, their nature, activation energies, cross sections, and concentrations under the applied stress by using photo-induced current transient spectroscopy and thermoelectric effect spectroscopy techniques. The operational stress limit is also given.

Ayoub, M.; Radley, I.; Mullins, J. T. [Kromek, Thomas Wright way, TS21 3FD, Sedgefield, County Durham (United Kingdom)] [Kromek, Thomas Wright way, TS21 3FD, Sedgefield, County Durham (United Kingdom); Hage-Ali, M. [CLEA, Airport road, Beirut (Lebanon)] [CLEA, Airport road, Beirut (Lebanon)

2013-09-14T23:59:59.000Z

478

Analysis of Cardio-respiratory Dynamics during Mental Stress using (Partial) Time-Frequency Spectra  

E-Print Network [OSTI]

important to determine the mechanisms un- derlying stress. In this paper, we aim at studying the cardio-respiratory to conduct a combined analysis of the cardio-respiratory system. In this study, we will perform cross timeAnalysis of Cardio-respiratory Dynamics during Mental Stress using (Partial) Time-Frequency Spectra

479

Adolescent Peer-Related Social Stress and Vulnerabilities for Underage Drinking  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 2. Histograms for Peer-Related Social Stress and Alcohol Use Manifest Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 3. Summary of Preliminary Regression Analyses for Variables... . . . . . . . . . . . . . 46 Figure 3. Final Structural Model for the Overall Sample . . . . . . . . . . . . . . 48 Figure 4. Graphical Representation of Global Self-Esteem as a Moderator of Peer-Related Social Stress and Alcohol Use...

Nelson, Jennifer Mize

2009-05-31T23:59:59.000Z

480

The Fermentation Stress Response Protein Aaf1p/ Yml081Wp Regulates Acetate Production in  

E-Print Network [OSTI]

The Fermentation Stress Response Protein Aaf1p/ Yml081Wp Regulates Acetate Production The production of acetic acid during wine fermentation is a critical issue for wineries since the sensory quality (2012) The Fermentation Stress Response Protein Aaf1p/Yml081Wp Regulates Acetate Production

Farrell, Anthony P.

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481

Stress-dependent recovery of point defects in deformed aluminum: An acoustic-damping study  

SciTech Connect (OSTI)

The stress dependence of point-defect diffusion to dislocations in a 99.99% polycrystalline aluminum was studied using shear-wave attenuation and phase velocity. By holding the stress after deformation, attenuation and velocity approach their nonstressed values. The holding stress was varied between 0 and 12 MPa, after applying a 15 MPa compressive stress. Time-independent attenuation and stress-induced velocity change were introduced into the Granato-Hikata-Luecke theory, which first established the change of attenuation and velocity caused by the point-defect diffusion to dislocations. Good agreement was found between measurements and the modified theory. The stress dependence of the recovery rate was interpreted as a reduction of the migration energy of point defects diffusing to dislocations, and the activation volume was calculated for uniaxial stress. Electromagnetic acoustic resonance (EMAR) was used for the measurements. Being noncontact and highly sensitive, EMAR permitted detailed measurement of the attenuation and velocity evolutions during the unloading-holding stress sequence.

Ogi, H.; Tsujimoto, A.; Hirao, M.; Ledbetter, H.

1999-10-26T23:59:59.000Z

482

Statistical Characterization of Zonal and Meridional Ocean Wind Stress SARAH T. GILLE  

E-Print Network [OSTI]

fully captures the range of extreme wind events seen in the raw swath data. Frequency spectraStatistical Characterization of Zonal and Meridional Ocean Wind Stress SARAH T. GILLE Scripps) ABSTRACT Four years of ocean vector wind data are used to evaluate statistics of wind stress over the ocean

Gille, Sarah T.

483

Clostridium thermocellum Transcriptomic Profiles after Exposure to Furfural or Heat Stress  

SciTech Connect (OSTI)

Background The thermophilic anaerobe Clostridium thermocellum is a candidate consolidated bioprocessing (CBP)biocatalyst for cellulosic ethanol production. It is capable of both cellulose solubilization and its fermentation to produce lignocellulosic ethanol. Intolerance to stresses routinely encountered during industrial fermentations may hinder the commercial development of this organism. A previous C. thermocellum ethanol stress study showed that largest transcriptomic response was in genes and proteins related to nitrogen uptake and metabolism. Results In this study, C. thermocellum was grown to mid-exponential phase and treated with furfural or heat to a final concentration of 3 g.L-1 or 68 C respectively to investigate general and specific physiological and regulatory stress responses. Samples were taken at 10, 30, 60 and 120 min post-shock, and from untreated control fermentations, for transcriptomic analyses and fermentation product determinations and compared to a published dataset from an ethanol stress study. Urea uptake genes were induced following furfural stress, but not to the same extent as ethanol stress and transcription from these genes was largely unaffected by heat stress. The largest transcriptomic response to furfural stress was genes for sulfate transporter subunits and enzymes in the sulfate assimilatory pathway, although these genes were also affected late in the heat and ethanol stress responses. Lactate production was higher in furfural treated culture, although the lactate dehydrogenase gene was not differentially expressed under this condition. Other redox related genes such as a copy of the rex gene, a bifunctional acetaldehyde-CoA/alcohol dehydrogenase and adjacent genes did show lower expression after furfural stress compared to the control, heat and ethanol fermentation profiles. Heat stress induced expression from chaperone related genes and overlap was observed with the responses to the other stresses. This study suggests the involvement of C. thermocellum genes with functions in oxidative stress protection, electron transfer, detoxification, sulfur and nitrogen acquisition, and DNA repair mechanisms in its stress responses and the use of different regulatory networks to coordinate and control adaptation. Conclusions This study has identified C. thermocellum gene regulatory motifs and aspects of physiology and gene regulation for further study. The nexus between future systems biology studies and recently developed genetic tools for C. thermocellum offers the potential for more rapid strain development and for broader insights into this organism s physiology and regulation.

Wilson, Charlotte M [ORNL; Yang, Shihui [ORNL; Rodriguez, Jr., Miguel [ORNL; Ma, Qin [University of Georgia, Athens, GA; Johnson, Courtney M [ORNL; Dice, Lezlee T [ORNL; Xu, Ying [University of Georgia, Athens, GA; Brown, Steven D [ORNL

2013-01-01T23:59:59.000Z

484

Stress evaluation of welded steel bridges on coal-haul routes. Interim research report  

SciTech Connect (OSTI)

Certain roads in Kentucky are designated as `extended-weight coal haul routes.` On those roads, coal transporters are allowed to employ coal trucks loaded far in excess of legal limits in force on normal roads throughout the state. The objective of this study is to measure live-load stresses on welded steel bridges on extended-weight coal haul routes. Fatigue analyses are performed on strain (stress) data derived from field stress measurements. Those are performed to determine whether the magnitude of those stresses and frequency of their occurrence are sufficient to pose fatigue problems presently or over the anticipated service lives of those bridges (i.e., 75 years). Live-load stress data obtained from bridges not possessing fatigue-prone weld details may be of benefit to bridge designers.

Hopwood, T.; Hogan, K.J.; Oberst, C.M.

1993-05-01T23:59:59.000Z

485

Neutron diffraction measurements of residual stresses in friction stir welding: a review  

SciTech Connect (OSTI)

Significant amounts of residual stresses are often generated during welding and result in critical degradation of the structural integrity and performance of components. Neutron diffraction has become a well established technique for the determination of residual stresses in welds because of the unique deep penetration, three-dimensional mapping capability, and volume averaged bulk measurements characteristic of the scattering neutron beam. Friction stir welding has gained prominence in recent years. The authors reviewed a number of neutron diffraction measurements of residual stresses in friction stir welds and highlighted examples addressing how the microstructures and residual stresses are correlated with each other. An example of in situ neutron diffraction measurement result shows the evolution of the residual stresses during welding.

Woo, Wan Chuck [ORNL; Feng, Zhili [ORNL; Wang, Xun-Li [ORNL; David, Stan A [ORNL

2011-01-01T23:59:59.000Z

486

Last update / Dernire mise jour: 7/07/2005 EU Member States Other countries (continued)  

E-Print Network [OSTI]

Zambia 127 Suriname 122 Zimbabwe 133 Swaziland 129 Switzerland 215 Syrian Arab Republic 141 Tajikistan

De Cindio, Fiorella

487

Apports des rseaux baysiens pour la sret et la mise en scurit des infrastructures ptrolires offshore  

E-Print Network [OSTI]

offshore Contributions of Bayesian networks for safety and security of offshore oil infrastructures Xavier.000 champs offshore, impliquant chacun d'une part un ensemble d'Ă©quipements pour extraire, traiter et stocker

Paris-Sud XI, Université de

488

Article de recherche Mise au point et valuation d'une mthode opacimtrique  

E-Print Network [OSTI]

of an opacimetric method to determine in vitro anti- microbial susceptibility of Mycoplasma bovis. A micromethod. This method, regardless of the mycoplasma species used, gives results similar to those obtained with standardi

Boyer, Edmond

489

Rapport de projet de fin d'tudes Mise en oeuvre et valuation d'analyses  

E-Print Network [OSTI]

of classes, the call graph of methods, or the objects diagram of a set of analyzed classes. Recent researches, their relationship with other objects, method calls, etc. The subject of this final project in the Lande team

André, Étienne

490

LOST IN TRANSLATION ETUDE DE LA MISE EN PLACE D'UN  

E-Print Network [OSTI]

courant de pensée : le New Public Management (NPM) ou nouvelle gestion publique (Hood 1995 ; Pollit et réformes se réclamant du NPM visent à moderniser la gestion publique (Aucoin, 1995 ; Terry 1998). Hood (1991) et Pollitt (1993) décrivent le NPM comme un phénomÚne de « managérialisation » des organisations

Paris-Sud XI, Université de

491

Racteurs thermochimiques solaires. Mise au point et caractrisation d'un racteur lit brass  

E-Print Network [OSTI]

000) solar furnace (2 kW power) was built in view to valorize solar energy using thermal means long) is used as a concentrated solar energy absorber and in the same time as a transfer wall to the powder. The temperature profile at the cylinder surface is directly depending on the incident solar

Paris-Sud XI, Université de

492

DC Resistivity Survey (Mise-A-La-Masse) At Roosevelt Hot Springs...  

Open Energy Info (EERE)

Area. References S. H. Ward, W. T. Parry, W. P. Nash, W. R. Sill, K. L. Cook, R. B. Smith, D. S. Chapman, F. H. Brown, J. A. Whelan, J. R. Bowman (1978) A Summary of the...

493

MISE EN SECURITE DES CARRIERES SOUTERRAINES COLLET Tanguy \\ MASROURI Farimah \\ DIDIER Christophe 2  

E-Print Network [OSTI]

failure in underground quarries can générale surface subsidence with public safety and environmental of cavities, should be used to control and to settle thé ~ hazards linked to underground quarries. Thé Unes-WORDS : Prévention, protection, backfilling, underground quarries. 1. Introduction Des milliers d'hectares sont, sur

Boyer, Edmond

494

Les odiums des cucurbitaces. II. Mise au point d'une technique de conservation des sou-  

E-Print Network [OSTI]

, tabac, piment, HgCl2, technique de désinfection. SUMMARY Powdery mildews of cucurbits. II. A method on pepper. Detached leaves were first disinfected by soaking for 3 minutes in an aqueous solution of 0

Paris-Sud XI, Université de

495

DC Resistivity Survey (Mise-A-La-Masse) At Roosevelt Hot Springs Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergy

496

DC Resistivity Survey (Mise-A-La-Masse) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation, search GEOTHERMAL

497

Mise en vidence du Tomato Black Ring Virus (TBRV) chez l'artichaut en France  

E-Print Network [OSTI]

carborundum (80 mg/ml dans les 2 cas) aprÚs broyage des feuilles infectées dans un tampon phosphate 0,01 M - p -- pH 7. Le broyat est inoculé en présence de carborundum à N. tabacum Xanthi et à P. flori- dana. 4

Paris-Sud XI, Université de

498

Mise en vidence d'une activit lipoprotine-lipasique dans le tissu adipeux de chvre  

E-Print Network [OSTI]

partir de poudres acéto- #12;niques (Korn et Quigley, 1955) puis acéto-éthérées du tissu (Robinson, 1963'homogénats aqueux du tissu adipeux (Korn et Quigley, 1955). D'aprÚs Benson (1969), la L.P.L. du tissu adipeux de

Boyer, Edmond

499

Mise-A-La-Masse At Kilauea East Rift Geothermal Area (Kauahikaua, Et Al.,  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte GmbHMilo, Maine: EnergyMinnErgy LLCMinwindPower1980) | Open Energy

500

Mise-A-La-Masse Mapping of the HGP-A Geothermal Reservoir, Hawaii | Open  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte GmbHMilo, Maine: EnergyMinnErgy LLCMinwindPower1980) | Open