Sample records for b-100 bone-equivalent plastic

  1. Results of the 2007 B100 Quality Survey

    SciTech Connect (OSTI)

    Alleman, T. L.; McCormick, R. L.

    2008-03-01T23:59:59.000Z

    In a 2007 analysis of samples from 52% of U.S. biodiesel (B100) producers, 90% met ASTM and other specifications for critical engine performance properties and for elements that harm emission controls.

  2. 2006 B100 Quality Survey Results: Milestone Report

    SciTech Connect (OSTI)

    Alleman, T. L.; McCormick, R. L.; Deutch, S.

    2007-05-01T23:59:59.000Z

    In 2006, the National Renewable Energy Laboratory conducted a nationwide quality survey of pure biodiesel (B100) intended to be used as a blendstock. The study collected random samples throughout the United States and analyzed them for quality against the current and proposed ASTM D6751 fuel quality specifications.

  3. S M Stoller Star Center-B100

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I koker227STAR/19/06B100

  4. ASL & Plasticity Plasticity

    E-Print Network [OSTI]

    Coulson, Seana

    ASL & Plasticity #12;Plasticity Plasticity From Wikipedia, the free encyclopedia Plasticity has four meanings: · Plasticity (physics): In physics and engineering, plasticity is the propensity of a material to undergo permanent deformation under load. · Phenotypic plasticity: Describes the degree

  5. Advantages of Biofuels B100 biodiesel has many benefits over traditional, petroleum-based

    E-Print Network [OSTI]

    Advantages of Biofuels B100 biodiesel has many benefits over traditional, petroleum-based diesel fuel. It reduces air pollution, costs less than petroleum diesel, and results in cleaner engines Reduces operating and maintenance costs by 20-40% vs. petroleum-based fuels Human Health Benefits Reduces

  6. S M Stoller Star Center-B100 Monthly/Effluent; Largo, FL

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I1/06 Technical ReportB100

  7. Plastic Bronchitis

    E-Print Network [OSTI]

    Quysner, Annie; Surani, Salim; Roberts, Daniel

    2011-01-01T23:59:59.000Z

    al. Three children with plastic bronchitis associated within E mergency M edicine Plastic Bronchitis Annie Quysner, MDElshami AA, Kang DS, et al. Plastic Bronchitis. Eur Resp J

  8. EPDM plasticizers

    SciTech Connect (OSTI)

    Godail, M.J.

    1983-08-01T23:59:59.000Z

    The properties of paraffinic, naphthenic, and aromatic extender oils used as EPDM plasticizers are discussed in detail. Particular attention is given to viscosity, volatility, specific gravity, and aromatic content.

  9. Performance and Emissions Characteristics of Bio-Diesel (B100)-Ignited Methane and Propane Combustion in a Four Cylinder Turbocharged Compression Ignition Engine

    SciTech Connect (OSTI)

    Shoemaker, N. T.; Gibson, C. M.; Polk, A. C.; Krishnan, S. R.; Srinivasan, K. K.

    2011-10-05T23:59:59.000Z

    Different combustion strategies and fuel sources are needed to deal with increasing fuel efficiency demands and emission restrictions. One possible strategy is dual fueling using readily available resources. Propane and natural gas are readily available with the current infrastructure and biodiesel is growing in popularity as a renewable fuel. This paper presents experimental results from dual fuel combustion of methane (as a surrogate for natural gas) and propane as primary fuels with biodiesel pilots in a 1.9 liter, turbocharged, 4 cylinder diesel engine at 1800 rev/min. Experiments were performed with different percentage energy substitutions (PES) of propane and methane and at different brake mean effective pressures (BMEP/bmep). Brake thermal efficiency (BTE) and emissions (NOx, HC, CO, CO2, O2 and smoke) were also measured. Maximum PES levels for B100-methane dual fuelling were limited to 70% at 2.5 bar bmep and 48% at 10 bar bmep, and corresponding values for B100-propane dual fuelling were 64% and 43%, respectively. Maximum PES was limited by misfire at 2.5 bar bmep and the onset of engine knock at 10 bar bmep. Dual fuel BTEs approached straight B100 values at 10 bar bmep while they were significantly lower than B100 values at 2.5 bar bmep. In general dual fuelling was beneficial in reducing NOx and smoke emissions by 33% and 50%, respectively from baseline B100 levels; however, both CO and THC emissions were significantly higher than baseline B100 levels at all PES and loads.

  10. Plastic Recycling Toter -ORANGE

    E-Print Network [OSTI]

    Toronto, University of

    microfuge tubes - beakers - flasks - bottles - jars - Plastic disposable pipettes with cotton plugsPlastic Recycling Toter - ORANGE Glass Recycling Toter - TEAL Garbage Yellow sharps container Categories - All Plastic except Styrofoam - rinsed 3 times - may have contained Biohazard level 1 bacteria

  11. Plastic explosives Mike Hopkins

    E-Print Network [OSTI]

    Ravenel, Douglas

    Plastic explosives Mike Hill Mike Hopkins Doug Ravenel What this talk is about The poster The HHRH The reduced E4 -term 1.1 Plastic explosives: A C4 analog of the Kervaire invariant calculation Conference of Virginia Mike Hopkins Harvard University Doug Ravenel University of Rochester #12;Plastic explosives Mike

  12. Polycrystal Plasticity -Multiple Slip"

    E-Print Network [OSTI]

    Rollett, Anthony D.

    Polycrystal Plasticity - Multiple Slip" 27-750 Texture, Microstructure & Anisotropy A.D. Rollett;2 Objective" The objective of this lecture is to show how plastic deformation in polycrystals requires of Los Alamos polycrystal plasticity, LApp; also the Viscoplastic Selfconsistent code, VPSC; also

  13. 2013 PLASTIC SURGERY VISITING PROFESSOR

    E-Print Network [OSTI]

    Shoubridge, Eric

    2013 PLASTIC SURGERY VISITING PROFESSOR Dr. Mutaz B. Habal June 6, 2013 McGill University Division of Plastic Surgery 2013 PLASTIC SURGERY VISITING PROFESSOR Special thanks to our sponsors: Representative: Katherine Marchand Canadian Association of Plastic Surgeons Educational Foundation Division of Plastic

  14. LINEARIZED PLASTICITY IS THE EVOLUTIONARY -LIMIT OF FINITE PLASTICITY

    E-Print Network [OSTI]

    Stefanelli, Ulisse

    LINEARIZED PLASTICITY IS THE EVOLUTIONARY -LIMIT OF FINITE PLASTICITY ALEXANDER MIELKE AND ULISSE in plasticity. By taking the small-deformations limit, we prove via -convergence for rate-independent processes plastic evolution by means of a deli- cate recovery sequence construction relating energy and dissipation

  15. Extruded plastic scintillation detectors

    SciTech Connect (OSTI)

    Anna Pla-Dalmau, Alan D. Bross and Kerry L. Mellott

    1999-04-16T23:59:59.000Z

    As a way to lower the cost of plastic scintillation detectors, commercially available polystyrene pellets have been used in the production of scintillating materials that can be extruded into different profiles. The selection of the raw materials is discussed. Two techniques to add wavelength shifting dopants to polystyrene pellets and to extrude plastic scintillating strips are described. Data on light yield and transmittance measurements are presented.

  16. The Plastic Ocean Michael Gonsior

    E-Print Network [OSTI]

    Boynton, Walter R.

    The Plastic Ocean Michael Gonsior Bonnie Monteleone, William Cooper, Jennifer O'Keefe, Pamela Seaton, and Maureen Conte #12;#12;#12;Plastic does not biodegrade it photo-degrades breaking down is the plastic cheese wrap? Unfortunately, marine creatures mistake plastics in the ocean for food #12

  17. Scale Effects in Crystal Plasticity

    E-Print Network [OSTI]

    Padubidri Janardhanachar, Guruprasad

    2010-07-14T23:59:59.000Z

    The goal of this research work is to further the understanding of crystal plasticity, particularly at reduced structural and material length scales. Fundamental understanding of plasticity is central to various challenges facing design...

  18. Nottingham Trent University Plastic Recycling

    E-Print Network [OSTI]

    Evans, Paul

    5015/03/08 Nottingham Trent University Plastic Recycling Water and fizzy drinks bottles Contaminated plastic (food, fluids, etc.) Oil containers Toxic chemical containers Metal strips or fasteners Carrier bags and bin liners Margarine tubs, wall coverings Yoghurt pots, egg cartons, plastic packaging

  19. Adaptive Plasticity and Plasticity as an Adaptation: A Selective Review of Plasticity in Animal Morphology and Life History

    E-Print Network [OSTI]

    Gotthard, Karl

    Adaptive Plasticity and Plasticity as an Adaptation: A Selective Review of Plasticity in Animal wide-ranging. All key REVIEW references should be cited. A summary is required. Adaptive plasticity and plasticity as an adaptation: a selective review of plasticity in animal morphology and life history Karl

  20. Retrofit for Plastic Resin Driers

    E-Print Network [OSTI]

    Joseph, B.; Thuro, G.

    RETROFIT FOR PLASTIC RESIN DRIERS BABU JOSEPH PH.D. Supervising Engineer Southern California Edison Company, Irwindale, California GEORGE THURO Thuro, & Associates, Costa Mesa, California Plastic resins used in injection molding have... installation of dew point meters and a programmable controller to tailor the regeneration cycle to the required dew point temperature. Background It was estimated that there are about 450 plastic processors in the Southern California Edison service...

  1. Waste Toolkit A-Z Plastic bags

    E-Print Network [OSTI]

    Melham, Tom

    Waste Toolkit A-Z Plastic bags Can I recycle plastic bags? No. At the moment you can't recycle plastic bags in the University recycling. Instead, choose alternatives to plastic bags when shopping have to use a cotton bag 131 times to ensure it has lower global warming potential than a plastic

  2. Waste Toolkit A-Z Plastic Grundon

    E-Print Network [OSTI]

    Melham, Tom

    Waste Toolkit A-Z Plastic ­ Grundon Also see `Swap Shop' and `Office Recycling ­ Grundon' in the Waste Toolkit A-Z How can I recycle plastic? There are lots of different types of plastic. Typically, waste contractors can only recycle PETE plastic and HDPE plastic. The University's preferred waste

  3. PLASTIC PORT NON-CONDUCTIVE

    E-Print Network [OSTI]

    Berns, Hans-Gerd

    PIN NO. 1 INDICATOR 81 3 5 2 4 6 7 CONDUCTIVE PLASTIC PORT NON-CONDUCTIVE PLASTIC HOUSING Description The conductive port option for the Low Cost Miniature Link component family consists of a grounding path from the conductive port to four grounding pins as shown in the package outline drawing

  4. FIRST EXPERIMENTS WITH THE PLASTIC BALL

    E-Print Network [OSTI]

    Gutbrod, H.H.

    2010-01-01T23:59:59.000Z

    FIRST EXPERIMENTS WITH THE PLASTIC BALL H.H. Gutbrod, A.scheme for one module Plastic Soil Response (based on protonS Ropidity Fig. 3. Plastic Ball acceptance in the plane

  5. PLASTIC DEFORMATIONPLASTIC DEFORMATION Modes of Deformation

    E-Print Network [OSTI]

    Subramaniam, Anandh

    PLASTIC DEFORMATIONPLASTIC DEFORMATION Modes of Deformation The Uniaxial Tension Test Mechanisms underlying Plastic Deformation Strengthening mechanisms Mechanical Metallurgy George E Dieter McClick here to know about all the mechanisms by which materials fail #12;Slip (Dislocation motion) Plastic

  6. DIVISION 6 -WOOD AND PLASTICS 06000 GENERAL

    E-Print Network [OSTI]

    DIVISION 6 - WOOD AND PLASTICS ________________________________________________________________________ 06000 GENERAL 1. For both woods and plastics, special attention is called to matters of flame spread-dried. 3. For exterior wood or plastic framed structures, see Division 4 for dimensions of Sample Panel

  7. Developmental Plasticity Links Local Adaptation and Evolutionary

    E-Print Network [OSTI]

    Badyaev, Alex

    Developmental Plasticity Links Local Adaptation and Evolutionary Diversification in Foraging, University of Arizona, Tucson, Arizona Developmental plasticity is thought to reconcile the constraining role morphology into adulthood, providing an opportunity to directly examine the links between plasticity of bone

  8. High temperature, optically transparent plastics from biomass

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

    temperature, optically transparent plastics from biomass At a Glance Rapid, selective catalytic system to produce vinyl plastics from renewable biomass Stereoregular...

  9. Rhythms and plasticity: television temporality at home

    E-Print Network [OSTI]

    Irani, Lilly; Jeffries, Robin; Knight, Andrea

    2010-01-01T23:59:59.000Z

    priority. Plastic television watching did not demand com-and domestic demands [5]. 5.7 Nearly plastic Many of the

  10. Extruding plastic scintillator at Fermilab

    SciTech Connect (OSTI)

    Anna Pla-Dalmau; Alan D. Bross; Victor V. Rykalin

    2003-10-31T23:59:59.000Z

    An understanding of the costs involved in the production of plastic scintillators and the development of a less expensive material have become necessary with the prospects of building very large plastic scintillation detectors. Several factors contribute to the high cost of plastic scintillating sheets, but the principal reason is the labor-intensive nature of the manufacturing process. In order to significantly lower the costs, the current casting procedures had to be abandoned. Since polystyrene is widely used in the consumer industry, the logical path was to investigate the extrusion of commercial-grade polystyrene pellets with dopants to yield high quality plastic scintillator. This concept was tested and high quality extruded plastic scintillator was produced. The D0 and MINOS experiments are already using extruded scintillator strips in their detectors. An extrusion line has recently been installed at Fermilab in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new facility will serve to further develop and improve extruded plastic scintillator. This paper will discuss the characteristics of extruded plastic scintillator and its raw materials, the different manufacturing techniques and the current R&D program at Fermilab.

  11. High Performance Plastic DSSC | ANSER Center | Argonne-Northwestern...

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

    High Performance Plastic DSSC Home > Research > ANSER Research Highlights > High Performance Plastic DSSC...

  12. Plasticity of sandwich beam withPlasticity of sandwich beam withPlasticity of sandwich beam withPlasticity of sandwich beam with metallic foam coremetallic foam coremetallic foam coremetallic foam core

    E-Print Network [OSTI]

    Luo, Xiaoyu

    Plasticity of sandwich beam withPlasticity of sandwich beam withPlasticity of sandwich beam withPlasticity-- · Plasticity of lightweight sandwich structures, 2006 --Plasticity of lightweight sandwich structures, 2006 --Plasticity of lightweight sandwich structures, 2006 --Plasticity of lightweight sandwich structures, 2006

  13. Re-usability of plastics

    E-Print Network [OSTI]

    Bonas, Calvin (Calvin A.)

    2005-01-01T23:59:59.000Z

    A research project was designed in order to learn more about the quality of recycled plastics when compared to new material. The study was carried out by researching and learning about how the recycling process operates. ...

  14. Memory stability and synaptic plasticity

    E-Print Network [OSTI]

    Billings, Guy

    2009-01-01T23:59:59.000Z

    Numerous experiments have demonstrated that the activity of neurons can alter the strength of excitatory synapses. This synaptic plasticity is bidirectional and synapses can be strengthened (potentiation) or weakened ...

  15. Indentation of plastically graded materials

    E-Print Network [OSTI]

    Choi, In-Suk, Ph. D. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    The introduction of certain controlled gradients in plastic properties is known to promote resistance to the onset of damage at contact surfaces during some tribological applications. Gradients in composition, microstructure ...

  16. THE AGE OF PLASTIC INGENUITY + RESPONSIBILITY

    E-Print Network [OSTI]

    Mathis, Wayne N.

    THE AGE OF PLASTIC INGENUITY + RESPONSIBILITY An Interdisciplinary Symposium Stone Age, Bronze Age, Iron Age...and now the Age of Plastic. The Smithsonian Institution is leveraging its collections--arguably the world's greatest repository of plastic material culture--to investigate the significance of plastic, its

  17. Plastic bottles > Remove lids (not recyclable)

    E-Print Network [OSTI]

    Brierley, Andrew

    Plastic bottles Please: > Remove lids (not recyclable) > Empty bottles > Rinse milk bottles, & other bottles if possible > Squash bottles www.st-andrews.ac.uk/estates/environment All types of plastic bottle accepted Clear, opaque and coloured bottles Labels can remain on X No plastic bags X No plastics

  18. Phenotypic Plasticity, Ecophysiology, and Climate Change

    E-Print Network [OSTI]

    Saleska, Scott

    9/24/2010 1 Phenotypic Plasticity, Ecophysiology, and Climate Change Loren Albert Image is plasticity?p y Examples Limitations to plasticity: Valladares et al. 2007 Ecophysiological when the habitat changes? Habitat Tracking Ackerly 2003 #12;9/24/2010 3 Evolution Plasticity #12

  19. Plastics Engineering UMass Lowell Commonwealth Honors Track

    E-Print Network [OSTI]

    Massachusetts at Lowell, University of

    Plastics Engineering UMass Lowell Commonwealth Honors Track Fall 2013 and Beyond Freshman Year Sophomore Year/Fall Semester Cr Sophomore/Spring Semester 26.001 Plastics Safety Lecture 0 26.002 Plastics Safety Lecture 0 26.201 Polymeric Materials I 3 26.202 Polymeric Materials II 3 26.215 Plastics Proc. Eng

  20. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainable alternatives to traditional plastics and conventional plastic waste

    E-Print Network [OSTI]

    to traditional plastics and conventional plastic waste management in the agricultural setting of the UBC Farm alternatives to traditional plastics and conventional plastic waste management in the agricultural setting ................................................................................................................. 9 Agricultural plastics

  1. TTUAB PLASTIC & ALUMINUM RECYCLING PROTOCOL Fall 2012 What Plastic Do We Recycle?

    E-Print Network [OSTI]

    Rock, Chris

    TTUAB PLASTIC & ALUMINUM RECYCLING PROTOCOL ­ Fall 2012 What Plastic Do We Recycle? TTUAB has taken on the responsibility of recycling #1 PET and #2 HDPE plastics by placing a yellow TTUAB Plastic Recycling bin on each. Technically, we are only responsible for aforementioned plastics and aluminum. However, any trash or other

  2. TTUAB PLASTIC & ALUMINUM RECYCLING PROTOCOL 2013 What Plastic Do We Recycle?

    E-Print Network [OSTI]

    Rock, Chris

    TTUAB PLASTIC & ALUMINUM RECYCLING PROTOCOL 2013 What Plastic Do We Recycle? TTUAB has taken on the responsibility of recycling ALL plastics (#1 through #7) by placing a yellow TTUAB Plastic Recycling bin on each and in LH100. Technically, we are only responsible for aforementioned plastics and aluminum. However, any

  3. TTUAB PLASTIC RECYCLING PROTOCOL Fall 2011 What Plastic Do We Recycle?

    E-Print Network [OSTI]

    Rock, Chris

    TTUAB PLASTIC RECYCLING PROTOCOL ­ Fall 2011 What Plastic Do We Recycle? TTUAB has taken on the responsibility of recycling #1 PET and #2 HDPE plastics by placing a yellow TTUAB Plastic Recycling bin on each floor. Technically, we are only responsible for aforementioned plastics. However, any trash or other

  4. Color Matching for PlasticsColor Matching for Plastics Bill CheethamBill Cheetham

    E-Print Network [OSTI]

    Watson, Ian

    1 Color Matching for PlasticsColor Matching for Plastics Bill CheethamBill Cheetham GeneralIndustrial Systems Information ServicesInformation Services Medical SystemsMedical Systems PlasticsPlastics Power Electric Global Research Applications GE Plastics FormTool - lab color matching tool Color

  5. Extruded plastic scintillator including inorganic powders

    DOE Patents [OSTI]

    Bross, Alan D.; Mellott, Kerry L.; Pla-Dalmau, Anna

    2006-06-27T23:59:59.000Z

    A method for producing a plastic scintillator is disclosed. A plurality of nano-sized particles and one or more dopants can be combined with a plastic material for the formation of a plastic scintillator thereof. The nano-sized particles, the dopant and the plastic material can be combined within the dry inert atmosphere of an extruder to produce a reaction that results in the formation of a plastic scintillator thereof and the deposition of energy within the plastic scintillator, such that the plastic scintillator produces light signifying the detection of a radiative element. The nano-sized particles can be treated with an inert gas prior to processing the nano-sized particles, the dopant and the plastic material utilizing the extruder. The plastic scintillator can be a neutron-sensitive scintillator, x-ray sensitive scintillator and/or a scintillator for the detection of minimum ionizing particles.

  6. Plastics' Color Problem: How a New Device Will Prevent Waste...

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

    facts? Commercial plastics made at 752 degrees Fahrenheit and 2,000 psi Conventional plastic color detectors break at high temps and pressures Plastics with incorrect colors,...

  7. Shrink-Induced Superhydrophobic and Antibacterial Surfaces in Consumer Plastics

    E-Print Network [OSTI]

    Freschauf, Lauren R; McLane, Jolie; Sharma, Himanshu; Khine, Michelle; Bansal, Vipul

    2012-01-01T23:59:59.000Z

    Transformation of a Simple Plastic into a Superhydrophobic2005) Biocompatibility of Plastics. Technical WhitePaper.2011) Hot embossing of plastic microfluidic devices using

  8. Polishing compound for plastic surfaces

    DOE Patents [OSTI]

    Stowell, M.S.

    1993-01-01T23:59:59.000Z

    A polishing compound for plastic surfaces is disclosed. The compound contains by weight approximately 4 to 17 parts at least one petroleum distillate lubricant, 1 to 6 parts mineral spirits, 2.5 to 15 parts abrasive particles, and 2.5 to 10 parts water. The abrasive is tripoli or a similar material that contains colloidal silica. Preferably, most of the abrasive particles are less than approximately 10 microns, more preferably less than approximately 5 microns in size. The compound is used on PLEXIGLAS{sup TM}, LEXAN{sup TM}, LUCITE{sup TM}, polyvinyl chloride (PVC) and similar plastic materials whenever a smooth, clear polished surface is desired.

  9. Polishing compound for plastic surfaces

    DOE Patents [OSTI]

    Stowell, M.S.

    1995-08-22T23:59:59.000Z

    A polishing compound for plastic surfaces is disclosed. The compound contains by weight approximately 4 to 17 parts at least one petroleum distillate lubricant, 1 to 6 parts mineral spirits, 2.5 to 15 parts abrasive particles, and 2.5 to 10 parts water. The abrasive is tripoli or a similar material that contains fine particles silica. Preferably, most of the abrasive particles are less than approximately 10 microns, more preferably less than approximately 5 microns in size. The compound is used on PLEXIGLAS{trademark}, LEXAN{trademark}, LUCITE{trademark}, polyvinyl chloride (PVC) and similar plastic materials whenever a smooth, clear polished surface is desired. 5 figs.

  10. Polishing compound for plastic surfaces

    DOE Patents [OSTI]

    Stowell, Michael S. (New Ellenton, SC)

    1995-01-01T23:59:59.000Z

    A polishing compound for plastic surfaces. The compound contains by weight approximately 4 to 17 parts at least one petroleum distillate lubricant, 1 to 6 parts mineral spirits, 2.5 to 15 parts abrasive particles, and 2.5 to 10 parts water. The abrasive is tripoli or a similar material that contains fine particles silica. Preferably, most of the abrasive particles are less than approximately 10 microns, more preferably less than approximately 5 microns in size. The compound is used on PLEXIGLAS.TM., LEXAN.TM., LUCITE.TM., polyvinyl chloride (PVC) and similar plastic materials whenever a smooth, clear polished surface is desired.

  11. Mechanically equivalent elastic-plastic deformations and the problem of plastic spin David J. Steigmann1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Mechanically equivalent elastic-plastic deformations and the problem of plastic spin David J author to receive correspondence (steigman@me.berkeley.edu) Abstract: The problem of plastic spin is phrased in terms of a notion of mechanical equivalence among local relaxed configurations of an elastic/plastic

  12. Influence of plasticizer molecular weight on plasticizer retention in PVC geomembranes

    E-Print Network [OSTI]

    PROOFS Influence of plasticizer molecular weight on plasticizer retention in PVC geomembranes T. D, accepted 31 October 2004 ABSTRACT: Plasticizers are used to make PVC flexible so it can be used as a geomembrane. Plasticizers can migrate from PVC geomembranes over time because of contact with air, liquid, and

  13. Optimal phenotypic plasticity in a stochastic environment 1 Optimal phenotypic plasticity in a stochastic environment

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Optimal phenotypic plasticity in a stochastic environment 1 Optimal phenotypic plasticity.coquillard@unice.fr ; phone: #33 4 92 38 64 30 Abstract This paper addresses the question of optimal phenotypic plasticity expense of plasticity, and benefit is fitness. The dispersion matrix of the genes' response (H = ln

  14. Plasticity of Dendritic Excitability Andreas Frick,* Daniel Johnstony

    E-Print Network [OSTI]

    Johnston, Daniel

    Plasticity of Dendritic Excitability Andreas Frick,* Daniel Johnstony Baylor College of Medicine function display plasticity under diverse circumstances such as neuromo- dulation, adaptation, learning115, 2005 Keywords: intrinsic plasticity; synaptic plasticity; long- term potentiation (LTP); dendrite

  15. ASSISTANT PROFESSOR (SEMI-RIGID PLASTIC PACKAGING)

    E-Print Network [OSTI]

    Stuart, Steven J.

    ASSISTANT PROFESSOR (SEMI-RIGID PLASTIC PACKAGING) IN FOOD, NUTRITION, & PACKAGING SCIENCES/rigid plastics packaging. The successful candidate will be responsible for teaching undergraduate and graduate in university teaching, experience in designing and implementing semi-rigid/rigid plastics research, a record

  16. Plasticity in FEniCS Piotr Minakowski

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Plasticity in FEniCS Piotr Minakowski Institute of Applied Mathematics and Mechanics, University@karlin.mff.cuni.cz SEMINAR O SOFTWARU PRO GEOFYZIKY aneb Jednooci slepym #12;Outline Plasticity Introduction Computational Methods Fluid Model of Crystal Plasticity Motivations Model Kirchhoff stress Numerical treatment

  17. Neural Plasticity of Development and Learning

    E-Print Network [OSTI]

    Gabrieli, John

    Neural Plasticity of Development and Learning Galvan, 2010 Presented by Kristen Morin and Sunil Patel I. Defining Development and Learning II. Neural Plasticity III. Progressive and Regressive Changes with Learning IV. Plasticity of Developmental Timing V. Neural Mechanism- Same or Different? VI. Methodological

  18. Reversibleirreversible plasticity transition in twinned copper nanopillars

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    Reversibleirreversible plasticity transition in twinned copper nanopillars J.A. Brown, N 31 October 2009 Abstract Through computer simulations, we show that plasticity in twinned copper nanopillar under compression, plastic deformation can be totally reversed when rR is in the range 0:5 6 rR 6

  19. Synaptic plasticity and memory Richard Kempter

    E-Print Network [OSTI]

    Kempter, Richard

    Synaptic plasticity and memory Richard Kempter 1,2,3 & Dietmar Schmitz 2,3 1 Institute in the central nervous system. In its most general form, the "synaptic plasticity and memory hypothesis" states, and that synaptic plasticity is both necessary and sufficient for the storage of information underlying

  20. Plasticity of Metal Nanowires Christopher R. Weinberger

    E-Print Network [OSTI]

    Cai, Wei

    Plasticity of Metal Nanowires Christopher R. Weinberger Sandia National Laboratories, Albuquerque-4040 (Dated: November 24, 2011) Abstract The mechanisms of plasticity in metal naowires with diameters below 100 nm are reviewed. At these length scales, plasticity in face-centered-cubic metals subjected

  1. PHENOTYPIC PLASTICITY Functional and Conceptual Approaches

    E-Print Network [OSTI]

    DeWitt, Thomas J.

    PHENOTYPIC PLASTICITY Functional and Conceptual Approaches Edited by Thomas J. DeWitt Samuel M. A great breadth of ideas fall under the rubric of phenotypic plasticity, and this book is designed these diverse ideas under an intentionally broad definition of plasticity: environment-dependent phenotype

  2. NUMERICAL APPROACHES TO THERMALLY COUPLED PERFECT PLASTICITY

    E-Print Network [OSTI]

    Bartels, Soeren

    NUMERICAL APPROACHES TO THERMALLY COUPLED PERFECT PLASTICITY SOREN BARTELS AND TOMAS ROUB at small strains exhibiting also stress-driven Prandtl-Reuss perfect plasticity are considered limit passage. Keywords: Thermodynamics, Prandtl-Reuss plasticity, Kelvin-Voigt rheology, thermal

  3. When Function Follows Form: Plastic Solar Cells | ANSER Center...

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

    When Function Follows Form: Plastic Solar Cells Home > Research > ANSER Research Highlights > When Function Follows Form: Plastic Solar Cells...

  4. Waste Toolkit A-Z Plastic cups Grundon

    E-Print Network [OSTI]

    Melham, Tom

    Waste Toolkit A-Z Plastic cups ­ Grundon Can I recycle plastic cups? Yes, you can recycle plastic cups if they are made from PET or HDPE plastic (ask your supplier to confirm the type of plastic if you do not know). If the cups are made from any other type of plastic (see symbols below) they cannot

  5. Process for remediation of plastic waste

    DOE Patents [OSTI]

    Pol, Vilas G; Thiyagarajan, Pappannan

    2013-11-12T23:59:59.000Z

    A single step process for degrading plastic waste by converting the plastic waste into carbonaceous products via thermal decomposition of the plastic waste by placing the plastic waste into a reactor, heating the plastic waste under an inert or air atmosphere until the temperature of about 700.degree. C. is achieved, allowing the reactor to cool down, and recovering the resulting decomposition products therefrom. The decomposition products that this process yields are carbonaceous materials, and more specifically carbon nanotubes having a partially filled core (encapsulated) adjacent to one end of the nanotube. Additionally, in the presence of a transition metal compound, this thermal decomposition process produces multi-walled carbon nanotubes.

  6. Process for remediation of plastic waste

    DOE Patents [OSTI]

    Pol, Vilas G. (Westmont, IL); Thiyagarajan, Pappannan (Germantown, MD)

    2012-04-10T23:59:59.000Z

    A single step process for degrading plastic waste by converting the plastic waste into carbonaceous products via thermal decomposition of the plastic waste by placing the plastic waste into a reactor, heating the plastic waste under an inert or air atmosphere until the temperature of 700.degree. C. is achieved, allowing the reactor to cool down, and recovering the resulting decomposition products therefrom. The decomposition products that this process yields are carbonaceous materials, and more specifically egg-shaped and spherical-shaped solid carbons. Additionally, in the presence of a transition metal compound, this thermal decomposition process produces multi-walled carbon nanotubes.

  7. Polishing compound for plastic surfaces

    DOE Patents [OSTI]

    Stowell, M.S.

    1991-01-01T23:59:59.000Z

    This invention is comprised of a polishing compound for plastic materials. The compound includes approximately by approximately by weight 25 to 80 parts at least one petroleum distillate lubricant, 1 to 12 parts mineral spirits, 50 to 155 parts abrasive paste, and 15 to 60 parts water. Preferably, the compound includes approximately 37 to 42 parts at least one petroleum distillate lubricant, up to 8 parts mineral spirits, 95 to 110 parts abrasive paste, and 50 to 55 parts water. The proportions of the ingredients are varied in accordance with the particular application. The compound is used on PLEXIGLAS{trademark}, LEXAN{trademark}, LUCITE{trademark}, polyvinyl chloride (PVC), and similar plastic materials whenever a smooth, clear polished surface is desired.

  8. Rigid-Plastic Approximations for Predicting Plastic Deformation of Cylindrical Shells Subject to Dynamic Loading

    E-Print Network [OSTI]

    Hoo Fatt, Michelle S.

    A theoretical approach was developed for predicting the plastic deformation of a cylindrical shell subject to asymmetric dynamic loads. The plastic deformation of the leading generator of the shell is found by solving for ...

  9. Extruded plastic scintillator for MINERvA

    SciTech Connect (OSTI)

    Pla-Dalmau, Anna; Bross, Alan D.; /Fermilab; Rykalin, Victor V.; Wood, Brian M.; /NICADD, DeKalb

    2005-11-01T23:59:59.000Z

    An extrusion line has recently been installed at Fermilab in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new facility will serve to further develop and improve extruded plastic scintillator. Since polystyrene is widely used in the consumer industry, the logical path was to investigate the extrusion of commercial-grade polystyrene pellets with dopants to yield high quality plastic scintillator. The D0 and MINOS experiments are already using extruded scintillator strips in their detectors. A new experiment at Fermilab is pursuing the use of extruded plastic scintillator. A new plastic scintillator strip is being tested and its properties characterized. The initial results are presented here.

  10. Method to separate and recover oil and plastic from plastic contaminated with oil

    DOE Patents [OSTI]

    Smith, Henry M. (Overland Park, KS); Bohnert, George W. (Harrisonville, MO); Olson, Ronald B. (Kansas City, MO); Hand, Thomas E. (Lee's Summit, MO)

    1998-01-27T23:59:59.000Z

    The present invention provides a method to separate and recover oils and recyclable plastic from plastic contaminated with oil. The invention utilizes the different solubility of oil in as liquid or supercritical fluid as compared to a gas to effect separation of the oil from the plastic.

  11. Materials Science and Engineering A 445446 (2007) 186192 Plastic instabilities and dislocation densities during plastic

    E-Print Network [OSTI]

    Gubicza, Jenõ

    Materials Science and Engineering A 445­446 (2007) 186­192 Plastic instabilities and dislocation densities during plastic deformation in Al­Mg alloys Gyozo Horv´ath, Nguyen Q. Chinh, Jeno Gubicza, J 2006 Abstract Plastic deformation of Al­Mg alloys were investigated by analyzing the stress

  12. Method to separate and recover oil and plastic from plastic contaminated with oil

    DOE Patents [OSTI]

    Smith, H.M.; Bohnert, G.W.; Olson, R.B.; Hand, T.E.

    1998-01-27T23:59:59.000Z

    The present invention provides a method to separate and recover oils and recyclable plastic from plastic contaminated with oil. The invention utilizes the different solubility of oil in a liquid or supercritical fluid as compared to a gas to effect separation of the oil from the plastic. 3 figs.

  13. Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 WHEN PLASTICITY?

    E-Print Network [OSTI]

    Burgoyne, Chris

    Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 rd July, 2007 WHEN PLASTICITY? Chris MORLEY Department of Engineering, University of Cambridge, UK Keywords: concrete, plasticity, cracking, flow, size effect, fibre reinforcement 1 BACKGROUND The need for adequate

  14. CHARGED PARTICLE IDENTIFICATION WITH MODULES OF THE PLASTIC BALL

    E-Print Network [OSTI]

    Gutbrod, H.H.

    2010-01-01T23:59:59.000Z

    WITH MODULES OF THE PLASTIC BALL H.H. Gutbrod, M.R. Maier,WITH MODULES OF THE PLASTIC BALL H.H. Gutbrod, M.R. Maier*,of modules of the Plastic Ball detector for positive pions

  15. ElasticPlastic Spherical Contact Modeling Including Roughness Effects

    E-Print Network [OSTI]

    Li, L.; Etsion, I.; Talke, F. E.

    2010-01-01T23:59:59.000Z

    A multilevel model for elasticplastic contact between ajunction growth of an elasticplastic spherical contact. J.nite element based elasticplastic model for the contact of

  16. THE RESPONSE OF SOLIDS TO ELASTIC/ PLASTIC INDENTATION

    E-Print Network [OSTI]

    Chiang, S.S.

    2013-01-01T23:59:59.000Z

    OF SOLIDS TO ELASTIC/PLASTIC INDENTATION S.S. Chiang, D.B.134. Table I Normalized Plastic Zone Size (B) and Materialken from the elastic/plastic boundary, surface intersection,

  17. Septin Self-Assembly: Plasticity and Protein Scaffolding

    E-Print Network [OSTI]

    Garcia, III, Galo

    2012-01-01T23:59:59.000Z

    Septin Self-Assembly: Plasticity and Protein Scaffolding BySpring 2012 Septin Self-Assembly: Plasticity and ProteinIII Abstract Septin Self-Assembly: Plasticity and Protein

  18. Developmental plasticity and the evolution of parental effects

    E-Print Network [OSTI]

    Richner, Heinz

    Developmental plasticity and the evolution of parental effects Tobias Uller Edward Grey Institute for evolutionary biologists is to understand how developmental plasticity can influence the evolutionary process. Devel- opmental plasticity frequently involves parental effects, which might enable adaptive and context

  19. Castable plastic mold with electroplatable base

    DOE Patents [OSTI]

    Domeier, Linda A.; Morales, Alfredo M.; Gonzales, Marcela G.; Keifer, Patrick M.

    2004-01-20T23:59:59.000Z

    A sacrificial plastic mold having an electroplatable backing is provided as are methods of making such a mold via the infusion of a castable liquid formulation through a porous metal substrate (sheet, screen, mesh or foam) and into the features of a micro-scale master mold. Upon casting and demolding, the porous metal substrate is embedded within the cast formulation and projects a plastic structure with features determined by the mold tool. The plastic structure provides a sacrificial plastic mold mechanically bonded to the porous metal substrate, which provides a conducting support suitable for electroplating either contiguous or non-contiguous metal replicates. After electroplating and lapping, the sacrificial plastic can be dissolved, leaving the desired metal structure bonded to the porous metal substrate. Optionally, the electroplated structures may be debonded from the porous substrate by selective dissolution of the porous substrate or a coating thereon.

  20. Sacrificial plastic mold with electroplatable base

    DOE Patents [OSTI]

    Domeier, Linda A. (Danville, CA); Hruby, Jill M. (Livermore, CA); Morales, Alfredo M. (Livermore, CA)

    2002-01-01T23:59:59.000Z

    A sacrificial plastic mold having an electroplatable backing is provided. One embodiment consists of the infusion of a softened or molten thermoplastic through a porous metal substrate (sheet, screen, mesh or foam) and into the features of a micro-scale molding tool contacting the porous metal substrate. Upon demolding, the porous metal substrate will be embedded within the thermoplastic and will project a plastic structure with features determined by the mold tool. This plastic structure, in turn, provides a sacrificial plastic mold mechanically bonded to the porous metal substrate which provides a conducting support suitable for electroplating either contiguous or non-contiguous metal replicates. After electroplating and lapping, the sacrificial plastic can be dissolved to leave the desired metal structure bonded to the porous metal substrate. Optionally, the electroplated structures may be debonded from the porous substrate by selective dissolution of the porous substrate or a coating thereon.

  1. Sacrificial Plastic Mold With Electroplatable Base

    DOE Patents [OSTI]

    Domeier, Linda A. (Danville, CA); Hruby, Jill M. (Livermore, CA); Morales, Alfredo M. (Livermore, CA)

    2005-08-16T23:59:59.000Z

    A sacrificial plastic mold having an electroplatable backing is provided. One embodiment consists of the infusion of a softened or molten thermoplastic through a porous metal substrate (sheet, screen, mesh or foam) and into the features of a micro-scale molding tool contacting the porous metal substrate. Upon demolding, the porous metal substrate will be embedded within the thermoplastic and will project a plastic structure with features determined by the mold tool. This plastic structure, in turn, provides a sacrificial plastic mold mechanically bonded to the porous metal substrate which provides a conducting support suitable for electroplating either contiguous or non-contiguous metal replicates. After electroplating and lapping, the sacrificial plastic can be dissolved to leave the desired metal structure bonded to the porous metal substrate. Optionally, the electroplated structures may be debonded from the porous substrate by selective dissolution of the porous substrate or a coating thereon.

  2. Fiberglass plastics in power plants

    SciTech Connect (OSTI)

    Kelley, D. [Ashland Performance Materials (United States)

    2007-08-15T23:59:59.000Z

    Fiberglass reinforced plastics (FRPs) are replacing metal in FGDs, stacks, tanks, cooling towers, piping and other plant components. The article documents the use of FRP in power plants since the 1970s. The largest volume of FRP in North American power plants is for stack liners and ductwork. Absorber vessel shells and internal components comprise the third largest use. The most common FRP absorber vessels are known as jet bubbling reactors (JBRs). One of the largest JBRs at a plant on the Ohio River removes 99% of sulphur dioxide from high sulphur coal flue gas. FRPs last twice as long as wood structures when used for cooling towers and require less maintenance. 1 tab., 2 photos.

  3. Characterization of the plastic substrates, the reflective layers...

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

    the plastic substrates, the reflective layers, the adhesives, and the grooves of today's archival-grade Characterization of the plastic substrates, the reflective layers, the...

  4. Economical Remediation of Plastic Waste into Advanced Materials...

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

    Economical Remediation of Plastic Waste into Advanced Materials with Coatings Technology available for licensing: An autogenic pyrolysis process to convert plastic waste into...

  5. Plastic flow in solids with interfaces

    E-Print Network [OSTI]

    Anurag Gupta; David Steigmann

    2011-11-25T23:59:59.000Z

    A non-equilibrium theory of isothermal and diffusionless evolution of incoherent interfaces within a plastically deforming solid is developed. The irreversible dynamics of the interface are driven by its normal motion, incoherency (slip and misorientation), and an intrinsic plastic flow; and purely by plastic deformation in the bulk away from the interface. Using the continuum theory for defect distribution (in bulk and over the interface) we formulate a general kinematical framework, derive relevant balance laws and jump conditions, and prescribe a thermodynamically consistent constitutive/kinetic structure for interface evolution.

  6. Plastic Deformation of 2D Crumpled Wires

    E-Print Network [OSTI]

    M A F Gomes; V P Brito; A S O Coelho; C C Donato

    2008-11-17T23:59:59.000Z

    When a single long piece of elastic wire is injected trough channels into a confining two-dimensional cavity, a complex structure of hierarchical loops is formed. In the limit of maximum packing density, these structures are described by several scaling laws. In this paper it is investigated this packing process but using plastic wires which give origin to completely irreversible structures of different morphology. In particular, it is studied experimentally the plastic deformation from circular to oblate configurations of crumpled wires, obtained by the application of an axial strain. Among other things, it is shown that in spite of plasticity, irreversibility, and very large deformations, scaling is still observed.

  7. INVESTIGATION Yeast Growth Plasticity Is Regulated by

    E-Print Network [OSTI]

    Sinha, Himanshu

    , Stanford University, Palo Alto, California 94304, BioMaPS Institute for Quantitative Biology, Rutgers to enhance or reduce the plasticity in a population. Several studies have identified roles of single genes

  8. Sol-gel antireflective coating on plastics

    DOE Patents [OSTI]

    Ashley, Carol S. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM)

    1990-01-01T23:59:59.000Z

    An antireflection film made from a reliquified sol-gel hydrolyzation, condensation polymeric reaction product of a silicon, alkoxides and/or metal alkoxides, or mixtures thereof. The film is particularly useful for coating plastics.

  9. Sol-gel antireflective coating on plastics

    DOE Patents [OSTI]

    Ashley, C.S.; Reed, S.T.

    1988-01-26T23:59:59.000Z

    An antireflection film made from reliquified sol-gel hydrolyzation, condensation polymeric reaction product of a silicon, alkoxides and/or metal alkoxides, or mixtures thereof. The film is particularly useful for coating plastics.

  10. Application of Desiccant Drying in Plastic Molding

    E-Print Network [OSTI]

    Brown, M.; Connors, G.; Moore, D.

    APPLICATION OF DESICCANT DRYING IN PLASTIC MOLDING Michael Brown, P.E. Greg Connors, P.E. Douglas Moore, P.E. Senior Research Engr. Industrial Engr. Senior Research Engr. Ga. Tech Research Inst. Atlanta Gas Light Co. Ga. Tech Research Inst... will condense on refrigerated display doors. In ice rinks, condensation will occur on the ice surface causing it to soften if the humidity too high. In plastic molding, chilled water is provi ed to rapidly cool the finished parts. Cooling incr...

  11. PLASTIC: Providing Lightweight & Adaptable Service Technology for Pervasive Information & Communication

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    PLASTIC: Providing Lightweight & Adaptable Service Technology for Pervasive Information@tid.es Abstract The PLASTIC project adopts and revisits service- oriented computing for Beyond 3rd Generation (B3G. Specifically, PLASTIC introduces the PLASTIC platform to enable robust distributed lightweight services in B3G

  12. Plastic strain due to twinning in austenitic TWIP steels

    E-Print Network [OSTI]

    Cambridge, University of

    Plastic strain due to twinning in austenitic TWIP steels B. Qin and H. K. D. H. Bhadeshia* Twinning induced plasticity steels are austenitic alloys in which mechanical twinning is a prominent deformation, Twinning, Twinning induced plasticity, Automobiles Introduction Mechanical twinning is a plastic

  13. Influence of plastic deformation on bimaterial fault rupture directivity

    E-Print Network [OSTI]

    Dmowska, Renata

    Influence of plastic deformation on bimaterial fault rupture directivity Nora DeDontney,1 Elizabeth of the role of the stress state on the distribution of plastic deformation and the direction of preferred in determining the location of plastic deformation. For different orientations, plastic deformation can

  14. Seismology of plastic deformation Jero^me Weiss *, Francois Louchet

    E-Print Network [OSTI]

    Weiss, Jérôme

    Seismology of plastic deformation Je´ro^me Weiss *, Franc¸ois Louchet Laboratoire de Glaciologie et-free critical picture of dislocational plasticity that challenges the classical continuum models of plasticity rights reserved. Keywords: Acoustic methods; Dislocation dynamics; Plastic deformation; Self

  15. Plastic flow in solids with interfaces Anurag Gupta

    E-Print Network [OSTI]

    Boyer, Edmond

    Plastic flow in solids with interfaces Anurag Gupta David. J. Steigmann November 22, 2011 Abstract a plastically deforming solid is developed. The irreversible dynamics of the interface are driven by its normal motion, incoherency (slip and misorientation), and an intrinsic plastic flow; and purely by plastic

  16. Plasticity of opsin gene expression in cichlids from Lake Malawi

    E-Print Network [OSTI]

    Carleton, Karen L.

    Plasticity of opsin gene expression in cichlids from Lake Malawi CHRISTOPHER M. HOFMANN, KELLY E. O plasticity has important evolutionary implications. In this study, we examined retinal plasticity in five found that the magnitude of plasticity varied across species. These findings have important implications

  17. Phenotypic Plasticity KAILEN A. MOONEY AND ANURAG A. AGRAWAL

    E-Print Network [OSTI]

    Mooney, Kailen A.

    43 FO U R Phenotypic Plasticity KAILEN A. MOONEY AND ANURAG A. AGRAWAL Phenotypic plasticity (Fig. 4.1A). Such plasticity is nearly ubiquitous in nature and occurs in various animal and plant phenotypes, including behavior, physiology, and morphology. Pheno- typic plasticity may be observed as both

  18. Development/Plasticity/Repair Group I Metabotropic Glutamate Receptors Control

    E-Print Network [OSTI]

    Grau, James

    Development/Plasticity/Repair Group I Metabotropic Glutamate Receptors Control Metaplasticity the spinal cord can support several forms of plasticity, including responseoutcome (instrumental) learning. This inhibi- tion of plasticity in spinal learning is itself a form of plasticity that requires i

  19. A single hardening elasto-plastic model for Kaolin clay with loading-history-dependent plastic potential function

    E-Print Network [OSTI]

    Prashant, Amit

    A single hardening elasto-plastic model for Kaolin clay with loading-history- dependent plastic and failure criteria are found to be strongly dependent on the principal stress rotation angle () and plastic work. A unique plastic potential function determined solely by the current stress state

  20. THE PLASTIC BALL - A MULTI-DETECTOR, LARGE SOLID ANGLE SPECTROMETER WITH CHARGED PARTICLE IDENTIFICATION FOR THE BEVALAC

    E-Print Network [OSTI]

    Maier, M.R.

    2012-01-01T23:59:59.000Z

    of charged particles in a Plastic Ball module. (XBL 7910-of Califomia. THE PLASTIC BALL - A MULTI-DETECTOR, LARGEBerkeley, California Summary PLASTIC 8/>Ll PLASTIC WALL For

  1. Miniature plastic gripper and fabrication method

    DOE Patents [OSTI]

    Benett, William J. (Livermore, CA); Krulevitch, Peter A. (Los Altos, CA); Lee, Abraham P. (Walnut Creek, CA); Northrup, Milton A. (Berkeley, CA); Folta, James A. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    A miniature plastic gripper actuated by inflation of a miniature balloon and method of fabricating same. The gripper is constructed of either heat-shrinkable or heat-expandable plastic tubing and is formed around a mandrel, then cut to form gripper prongs or jaws and the mandrel removed. The gripper is connected at one end with a catheter or tube having an actuating balloon at its tip, whereby the gripper is opened or closed by inflation or deflation of the balloon. The gripper is designed to removably retain a member to which is connected a quantity or medicine, plugs, or micro-components. The miniature plastic gripper is inexpensive to fabricate and can be used for various applications, such as gripping, sorting, or placing of micron-scale particles for analysis.

  2. Fabrication method for miniature plastic gripper

    DOE Patents [OSTI]

    Benett, W.J.; Krulevitch, P.A.; Lee, A.P.; Northrup, M.A.; Folta, J.A.

    1998-07-21T23:59:59.000Z

    A miniature plastic gripper is described actuated by inflation of a miniature balloon and method of fabricating same. The gripper is constructed of either heat-shrinkable or heat-expandable plastic tubing and is formed around a mandrel, then cut to form gripper prongs or jaws and the mandrel removed. The gripper is connected at one end with a catheter or tube having an actuating balloon at its tip, whereby the gripper is opened or dosed by inflation or deflation of the balloon. The gripper is designed to removably retain a member to which is connected a quantity or medicine, plugs, or micro-components. The miniature plastic gripper is inexpensive to fabricate and can be used for various applications, such as gripping, sorting, or placing of micron-scale particles for analysis. 8 figs.

  3. Miniature plastic gripper and fabrication method

    DOE Patents [OSTI]

    Benett, W.J.; Krulevitch, P.A.; Lee, A.P.; Northrup, M.A.; Folta, J.A.

    1997-03-11T23:59:59.000Z

    A miniature plastic gripper actuated by inflation of a miniature balloon and method of fabricating same are disclosed. The gripper is constructed of either heat-shrinkable or heat-expandable plastic tubing and is formed around a mandrel, then cut to form gripper prongs or jaws and the mandrel removed. The gripper is connected at one end with a catheter or tube having an actuating balloon at its tip, whereby the gripper is opened or closed by inflation or deflation of the balloon. The gripper is designed to removably retain a member to which is connected a quantity or medicine, plugs, or micro-components. The miniature plastic gripper is inexpensive to fabricate and can be used for various applications, such as gripping, sorting, or placing of micron-scale particles for analysis. 8 figs.

  4. Fabrication method for miniature plastic gripper

    DOE Patents [OSTI]

    Benett, William J. (Livermore, CA); Krulevitch, Peter A. (Los Altos, CA); Lee, Abraham P. (Walnut Creek, CA); Northrup, Milton A. (Berkeley, CA); Folta, James A. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    A miniature plastic gripper actuated by inflation of a miniature balloon and method of fabricating same. The gripper is constructed of either heat-shrinkable or heat-expandable plastic tubing and is formed around a mandrel, then cut to form gripper prongs or jaws and the mandrel removed. The gripper is connected at one end with a catheter or tube having an actuating balloon at its tip, whereby the gripper is opened or dosed by inflation or deflation of the balloon. The gripper is designed to removably retain a member to which is connected a quantity or medicine, plugs, or micro-components. The miniature plastic gripper is inexpensive to fabricate and can be used for various applications, such as gripping, sorting, or placing of micron-scale particles for analysis.

  5. PLASTIC DEFORMATION OF CRYSTALS: ANALYTICAL AND COMPUTER SIMULATION STUDIES OF DISLOCATION GLIDE

    E-Print Network [OSTI]

    Altintas, Sabri

    2011-01-01T23:59:59.000Z

    in Rate Processes in Plastic Deformation of Materials, J. C.PLASTIC DEFORMATION OF CRYSTALS: ANALYTICAL AND COMPUTERCAPTIONS FIGURES - iii - PLASTIC DEFORMATION OF CRYSTALS:

  6. EFFECT OF GRAIN SIZE ON THE ACOUSTIC EMISSION GENERATED DURING PLASTIC DEFORMATION OF COPPER

    E-Print Network [OSTI]

    Baram, J.

    2011-01-01T23:59:59.000Z

    PLASTIC DEFORMATION OF COPPER J, Baram Materials Engineeringfrom plastically deformed copper specimens were analyzedrelated to the behavior of copper while undergoing plastic

  7. Plasticity of the Dakota Clays of Kansas

    E-Print Network [OSTI]

    Belchic, George

    1915-06-01T23:59:59.000Z

    of plasticity from the physico-chemical direction were made by more recent investigators, for example, Ashley, in this cotmnfcry, has experimented with clays in order to e:q}lain th9 cause of plasticity by measuring the colloids of the clay. He was then able... of the present day conception of the colloidal state of' matter, Thomas Graham (9) an English physicist, working on his classical experiments 1860 - 64, on diffusion or dtlysis was led to divide substances into two groups, according *as the rate of diffusion...

  8. apo b-100 nitration: Topics by E-print Network

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

    to elevated cholesterol levels, the cardiovascular risk that has been proposed for the apo E 4 allele may, in individuals with the apoE 43 phenotype, be mediated by elevated...

  9. S M Stoller Star Center-B100

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I koker227STAR

  10. S M Stoller Star Center-B100

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I koker227STAR/19/06

  11. S M Stoller Star Center-B100

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I

  12. Microsoft Word - N01535_B100 Plume Delin Rpt

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$ EGcGand SurfaceRemediationClosure9 through May

  13. Microsoft Word - N01673_B100 AA final draft

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$ EGcGand SurfaceRemediationClosure9 throughDataDraft

  14. Transformation induced plasticity assisted steels: stress or strain affected martensitic

    E-Print Network [OSTI]

    Cambridge, University of

    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

  15. A mobile antineutrino detector with plastic scintillators

    E-Print Network [OSTI]

    Yasuhiro Kuroda; Shugo Oguri; Yo Kato; Ryoko Nakata; Yoshizumi Inoue; Chikara Ito; Makoto Minowa

    2012-06-28T23:59:59.000Z

    We propose a new type segmented antineutrino detector made of plastic scintillators for the nuclear safeguard application. A small prototype was built and tested to measure background events. A satisfactory unmanned field operation of the detector system was demonstrated. Besides, a detailed Monte Carlo simulation code was developed to estimate the antineutrino detection efficiency of the detector.

  16. insect Phenotypic Plasticity Diversity of Responses

    E-Print Network [OSTI]

    Gadagkar, Raghavendra

    Illinois State University Normal,IL, USA ~Science Publishers, Inc. Enfield (NH),USA Plymouth, UK ~Oo5 #12. Published by Science Publishers, Inc., Enfield, NH, USA Printed in India. #12;Behavioral Diversity and its Insect phenotypic plasticity editors, T.N. Ananthakrishnan. Douglas Whitman. p. em. Includes

  17. 4. pi. physics with the plastic ball

    SciTech Connect (OSTI)

    Gutbrod, H.H.; Loehner, H.; Poskanzer, A.M.; Renner, T.; Riedesel, H.; Ritter, H.G.; Warwick, A.; Weik, F.; Wieman, H.

    1982-10-01T23:59:59.000Z

    4 ..pi.. data taken with the Plastic Ball show that cluster production in relativistic nuclear collisions depends on both the size of the participant volume and the finite size of the cluster. The measurement of the degree of thermalization and the search for collective flow will permit the study of the applicability of macroscopic concepts such as temperature and density.

  18. CONTAINED PLASTIC DEFORMATION NEAR CRACKS AND NOTCHES UNDER LONGITUDINAL SHEAR

    E-Print Network [OSTI]

    CONTAINED PLASTIC DEFORMATION NEAR CRACKS AND NOTCHES UNDER LONGITUDINAL SHEAR James R. Rice* ABSTRACT An exact linear elastic-perfectly plastic solution is presented for the problem of a sharp notch coordinates corresponding to given stresses, position of the elastic-plastic boundary, and accompanying

  19. TIME DOMAIN REFLECTOMETRY MEASUREMENT AND HIGHLY PLASTIC CLAYS

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    1 TIME DOMAIN REFLECTOMETRY MEASUREMENT AND HIGHLY PLASTIC CLAYS By: J. A. Kuhn1 and J. G. Zornberg for use in highly plastic clay. The clay used for experimentation was taken locally from the Eagle Ford Ford Clay is determined. INTRODUCTION The progression of wetting and drying fronts in highly plastic

  20. Towards Model Driven Engineering of Plastic User Interfaces

    E-Print Network [OSTI]

    Towards Model Driven Engineering of Plastic User Interfaces Jean-Sébastien Sottet CLIPS of a same UI are to be produced for different platforms. The development of plastic user interfaces is even more demanding. In Human Computer Interaction, plasticity denotes the capacity of a UI to withstand

  1. Ecient elasto-plastic simulation ICA, University of Stuttgart, Germany

    E-Print Network [OSTI]

    Wieners, Christian

    E?cient elasto-plastic simulation C. Wieners ICA, University of Stuttgart, Germany Summary. In this paper we describe a method for the construction of radial re- turn algorithms to the plasticity models plasticity, the constitutive equations are determined by the free energy functional and a monotone function

  2. Glassy and plastic crystals of cyanoadamantane : a Brillouin scattering investigation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    L-617 « Glassy » and plastic crystals of cyanoadamantane : a Brillouin scattering investigation J. Abstract. 2014 The elastic constants ofcyanoadamantane have been measured in the plastic and « glassy temperature. The temperature dependence of C11 in the plastic phase has been explain- ed by the setting

  3. 1 Visco-plastic rheology 1.1 Effective viscosity

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    1 Visco-plastic rheology 1.1 Effective viscosity Rheology specifies the relationship between viscosity eff, = 2eff , (2) which includes viscous and plastic components, 1 eff = 1 visc + 1 plast . (3) Also the strain rate tensor can be split into viscous and plastic part, = visc + plast , (4) where

  4. Veteran's Administration Medical Center General Plastic Surgery Rotation

    E-Print Network [OSTI]

    Cui, Yan

    Veteran's Administration Medical Center General Plastic Surgery Rotation 2nd year Resident By the end of the Plastic Surgery Rotation at the VAMC, the 2nd year residents are expected to expand with the following conditions that require plastic surgery, including but not limited to: · Upper extremity

  5. Macroscopic yield criteria for plastic anisotropic materials containing spheroidal

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    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

  6. PLASTICIZER RETENTION IN PVC GEOMEMBRANES T. D. Stark1

    E-Print Network [OSTI]

    1 PLASTICIZER RETENTION IN PVC GEOMEMBRANES T. D. Stark1 , H. Choi2 , and P. W. Diebel3 1, Ontario, Canada, N1R 5T6; PH (519)623-1630; email: PDiebel@cgtower.com ABSTRACT: Plasticizers are used to make PVC flexible so it can be used as a geomembrane for containment purposes. Plasticizers can migrate

  7. Phenotypic plasticity: linking molecular mechanisms with evolutionary outcomes

    E-Print Network [OSTI]

    Novoplansky, Ariel

    Phenotypic plasticity: linking molecular mechanisms with evolutionary outcomes CARL D. SCHLICHTING1-ordinating editor: A. Novoplansky Abstract. We argue that phenotypic plasticity should be broadly construed level, all plastic responses originate at the level of individual cells, which receive and process

  8. Plasticity in fretting of coated substrates Matthew R. Begleya

    E-Print Network [OSTI]

    Hutchinson, John W.

    Plasticity in fretting of coated substrates Matthew R. Begleya , John W. Hutchinsonb of the plastic deformation in a metal substrate fretted by a at- bottomed circular peg under steady normal load of the corners of the peg. Deformation within the plastic zone is characterized, including regions of elastic

  9. Giant Plasticity of a Quantum Crystal Ariel Haziot,1

    E-Print Network [OSTI]

    Balibar, Sbastien

    Giant Plasticity of a Quantum Crystal Ariel Haziot,1 Xavier Rojas,1 Andrew D. Fefferman,1 John R crystals may irreversibly deform. This phenomenon is known as plasticity and it is due to the motion and in the zero temperature limit, helium 4 crystals present a giant plasticity that is anisotropic and reversible

  10. Phenotypic Plasticity Opposes Species Invasions by Altering Fitness Surface

    E-Print Network [OSTI]

    Phenotypic Plasticity Opposes Species Invasions by Altering Fitness Surface Scott D. Peacor1 ecological processes. However, the influence on invasions of phenotypic plasticity, a key component of many species interactions, is unknown. We present a model in which phenotypic plasticity of a resident species

  11. Developmental Plasticity in Cartesian Genetic Programming Artificial Neural Networks

    E-Print Network [OSTI]

    Fernandez, Thomas

    Developmental Plasticity in Cartesian Genetic Programming Artificial Neural Networks Maryam Mahsal developmental plasticity in Artificial Neural Networks using Carte- sian Genetic Programming. This is inspired by developmental plasticity that exists in the biological brain allowing it to adapt to a changing environment

  12. A study of microbend test by strain gradient plasticity

    E-Print Network [OSTI]

    Hsia, K Jimmy

    A study of microbend test by strain gradient plasticity W. Wanga , Y. Huangb, *, K.J. Hsiac , K with plastic deformation is on the order of microns. This size effect cannot be explained by classical plasticity theories since their constitutive relations do not have an intrinsic material length. Strain

  13. Plasticity of metal nanowires Christopher R. Weinberger*a

    E-Print Network [OSTI]

    Cai, Wei

    Plasticity of metal nanowires Christopher R. Weinberger*a and Wei Cai*b Received 2nd August 2011, Accepted 24th November 2011 DOI: 10.1039/c2jm13682a The mechanisms of plasticity in metal nanowires with diameters below 100 nm are reviewed. At these length scales, plasticity in face-centered-cubic metals

  14. Reversible plasticity in amorphous materials Micah Lundberg1

    E-Print Network [OSTI]

    Dennin, Michael

    Reversible plasticity in amorphous materials Micah Lundberg1 , Kapilanjan Krishan1 , Ning Xu2 to external loads. Plasticity, i.e. dis- sipative and irreversible macroscopic changes in a material for reversible plastic events at the microscopic scale in both experiments and simulations of two

  15. Harnessing plasticity to understand learning and treat disease

    E-Print Network [OSTI]

    Kilgard, Michael P.

    Harnessing plasticity to understand learning and treat disease Michael P. Kilgard The University, USA A large body of evidence suggests that neural plasticity contributes to learning and disease. Recent studies sug- gest that cortical map plasticity is typically a transient phase that improves

  16. Phenotypic plasticity facilitates recurrent rapid adaptation to introduced predators

    E-Print Network [OSTI]

    Pfrender, Michael

    Phenotypic plasticity facilitates recurrent rapid adaptation to introduced predators Alison G) A central role for phenotypic plasticity in adaptive evolution is often posited yet lacks empirical support of preexisting developmental pathways, producing rapid adaptive change. We examined the role of plasticity

  17. Developmental plasticity in plants: implications of non-cognitive behavior

    E-Print Network [OSTI]

    Novoplansky, Ariel

    Developmental plasticity in plants: implications of non- cognitive behavior ARIEL NOVOPLANSKY of interest in phenotypic plasticity in the last two decades. Most studies, however, are being carried out- logical and evolutionary approaches to the study of developmental plasticity. So as to focus

  18. Plastics, materials and dreams of dematerialization Bernadette Bensaude Vincent

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    1 Plastics, materials and dreams of dematerialization Bernadette Bensaude Vincent Published in J. Gabrys, G. Hawkins, M. Michael eds, Accumulation: The Material Politics of Plastic London, Routledge, pp. 17-29. `Plastics happen; that is all we need to know on earth.' This remark is extracted from Gain

  19. Plasticity at the micron scale John W. Hutchinson*

    E-Print Network [OSTI]

    Hutchinson, John W.

    Plasticity at the micron scale John W. Hutchinson* Division of Engineering and Applied Sciences into the plastic range: smaller is stronger. This eect has important implications for an increasing number of applications in electronics, structural materials and MEMS. Plastic behavior at this scale cannot

  20. Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 THE PLASTICITY OF UNREINFORCED CONCRETE

    E-Print Network [OSTI]

    Burgoyne, Chris

    Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 rd July, 2007 THE PLASTICITY OF UNREINFORCED CONCRETE Jacques HEYMAN Department of Engineering, University of Cambridge, UK Keywords: Mass concrete, plasticity 1 THE MATERIAL If a material is to be structurally useful

  1. Method of coextruding plastics to form a composite sheet

    DOE Patents [OSTI]

    Tsien, Hsue C. (Chatham Township, Morris County, NJ)

    1985-06-04T23:59:59.000Z

    This invention pertains to a method of producing a composite sheet of plastic materials by means of coextrusion. Two plastic materials are matched with respect to their melt indices. These matched plastic materials are then coextruded in a side-by-side orientation while hot and soft to form a composite sheet having a substantially uniform demarkation therebetween. The plastic materials are fed at a substantially equal extrusion velocity and generally have substantially equal viscosities. The coextruded plastics can be worked after coextrusion while they are still hot and soft.

  2. Method of cleaning plastics using super and subcritical media

    DOE Patents [OSTI]

    Sawan, S.P.; Spall, W.D.; Talhi, A.

    1998-05-26T23:59:59.000Z

    A method for treating a plastic, such as polyethylene or polypropylene, to remove at least a portion of at least one contaminant includes combining the plastic with a supercritical medium, such as carbon dioxide or sulfur hexafluoride, whereby at least a portion of the contaminant dissolves in the supercritical medium. Alternatively, the plastic can be combined with a suitable liquid medium, such as carbon dioxide or liquid sulfur hexafluoride. At least a portion of the medium, containing the dissolved contaminant, is separated from the plastic, thereby removing at least a portion of the contaminant from the plastic. 10 figs.

  3. Method of cleaning plastics using super and subcritical media

    DOE Patents [OSTI]

    Sawan, Samuel P. (Tyngsborough, MA); Spall, W. Dale (Los Alamos, NM); Talhi, Abdelhafid (Nashua, NH)

    1998-05-26T23:59:59.000Z

    A method for treating a plastic, such as polyethylene or polypropylene, to remove at least a portion of at least one contaminant includes combining the plastic with a supercritical medium, such as carbon dioxide or sulfur hexafluoride, whereby at least a portion of the contaminant dissolves in the supercritical medium. Alternatively, the plastic can be combined with a suitable liquid medium, such as carbon dioxide or liquid sulfur hexafluoride. At least a portion of the medium, containing the dissolved contaminant, is separated from the plastic, thereby removing at least a portion of the contaminant from the plastic.

  4. Thin Film Transistors On Plastic Substrates

    DOE Patents [OSTI]

    Carey, Paul G. (Mountain View, CA); Smith, Patrick M. (San Ramon, CA); Sigmon, Thomas W. (Portola Valley, CA); Aceves, Randy C. (Livermore, CA)

    2004-01-20T23:59:59.000Z

    A process for formation of thin film transistors (TFTs) on plastic substrates replaces standard thin film transistor fabrication techniques, and uses sufficiently lower processing temperatures so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The silicon based thin film transistor produced by the process includes a low temperature substrate incapable of withstanding sustained processing temperatures greater than about 250.degree. C., an insulating layer on the substrate, a layer of silicon on the insulating layer having sections of doped silicon, undoped silicon, and poly-silicon, a gate dielectric layer on the layer of silicon, a layer of gate metal on the dielectric layer, a layer of oxide on sections of the layer of silicon and the layer of gate metal, and metal contacts on sections of the layer of silicon and layer of gate metal defining source, gate, and drain contacts, and interconnects.

  5. Emergence of cooperativity in plasticity of soft glassy materials

    E-Print Network [OSTI]

    Le Bouil Antoine; Amon Axelle; McNamara Sean; Crassous Jrme

    2014-05-19T23:59:59.000Z

    The elastic coupling between plastic events is generally invoked to interpret plastic properties and failure of amorphous soft glassy materials. We report an experiment where the emergence of a self-organized plastic flow is observed well before the failure. For this we impose an homogeneous stress on a granular material, and measure local deformations for very small strain increments using a light scattering setup. We observe a non-homogeneous strain that appears as transient bands of mesoscopic size and well defined orientation, different from the angle of the macroscopic frictional shear band that appears at failure. The presence and the orientation of those micro-bands may be understood by considering how localized plastic reorganizations redistribute stresses in a surrounding continuous elastic medium. We characterize the lengthscale and persistence of the structure. The presence of plastic events and the mesostructure of the plastic flow are compared to numerical simulations.

  6. Volume reduction of hot cell plastic wastes

    SciTech Connect (OSTI)

    Dykes, F W; Henscheid, J P; Lewis, L C; Lundholm, C W; Nicklas, J H

    1989-09-19T23:59:59.000Z

    The disposal of radioactively-contaminated solid wastes has become a national crisis. In such circumstances, it is imperative that this waste be reduced to minimum volume and be packaged to prevent pollution of the environment. The majority of the solid waste generated at the hot cell under consideration is plastic lab ware. Cutting this waste into small pieces with a hot wire technique reduced the volume 66%. Melting the waste, although more time consuming, reduced the volume 90%. The hot wire technique can also be used to cut up damaged master slave manipulator boots, greatly reducing their disposal volume.

  7. Collective flow measured with the Plastic Ball

    SciTech Connect (OSTI)

    Ritter, H.G.; Gutbrod, H.H.; Kampert, K.H.; Kolb, B.; Poskanzer, A.M.; Schicker, R.; Schmidt, H.R.; Siemiarczuk, T.

    1989-08-01T23:59:59.000Z

    The experimental results from the Plastic Ball detector have contributed vastly to the understanding of the reaction mechanism of nuclear collisions at several hundred MeV per nucleon. The discovery of the collective flow phenomena (bounce-off of spectator fragments, side-splash in the reaction plane, and squeeze-out out of the reaction plane), as they were predicted by hydrodynamical models, has led to the experimental observation of compressed nuclear matter, which is a necessary condition before one can study the equation of state in detail and search for phase transitions at higher energies. 39 refs., 9 figs., 1 tab.

  8. Plastic Magen Industry | 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 ResourcesLoadingPenobscot County, Maine: EnergyPierceJump81647° LoadingPlainPlano, TX)PlasmaTechPlastic

  9. Internal Stress in a Model Elasto-Plastic Fluid

    E-Print Network [OSTI]

    Takeshi Ooshida; Ken Sekimoto

    2005-12-03T23:59:59.000Z

    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.

  10. auditory system plasticity: Topics by E-print Network

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

    two experiments which used auditory evoked potentials Trainor, Laurel J. 7 Plasticity and Perception in Primary Auditory Cortex University of California eScholarship Repository...

  11. area plastic scintillator: Topics by E-print Network

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

    lower the cost of plastic scintillation detectors, commercially available polystyrene pellets have been used in the production of scintillating materials that can be extruded into...

  12. Beryllium-7 Implantation in Plastics for Prosthesis Wear Studies...

    Office of Science (SC) Website

    instrumentation: 7Be Implantation in Plastics for Prosthesis Wear Studies Developed at: Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (HRIBF) Developed...

  13. affecting plastic instability: Topics by E-print Network

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

    can be resistant to chemicals. Consider all of the cleaning products that are packaged in plastic containers. 2. Polymers can be both thermal and electrical insulators. Thermal...

  14. activated plastic flow: Topics by E-print Network

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

    can be resistant to chemicals. Consider all of the cleaning products that are packaged in plastic containers. 2. Polymers can be both thermal and electrical insulators. Thermal...

  15. axonal plasticity elicits: Topics by E-print Network

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

    can be resistant to chemicals. Consider all of the cleaning products that are packaged in plastic containers. 2. Polymers can be both thermal and electrical insulators. Thermal...

  16. HCI AND SOFTWARE ENGINEERING FOR USER INTERFACE PLASTICITY

    E-Print Network [OSTI]

    Boyer, Edmond

    52 HCI AND SOFTWARE ENGINEERING FOR USER INTERFACE PLASTICITY Jolle analysis are perceived as too demand- ing in terms of time and competence

  17. SciTech Connect: CRACK TIP PLASTICITY AND FRACTURE INITIATION...

    Office of Scientific and Technical Information (OSTI)

    N50000* --Metals, Ceramics, & Other Materials; CRACKS; FRACTURE PROPERTIES; METALS BUILDING MATERIALSfracture of metal, crack tip plasticity and initiation criteria for;...

  18. Statistics of spikes trains, synaptic plasticity and Gibbs distributions

    E-Print Network [OSTI]

    B. Cessac; H. Rostro; J. C. Vasquez; T. Viville

    2008-10-22T23:59:59.000Z

    We introduce a mathematical framework where the statistics of spikes trains, produced by neural networks evolving under synaptic plasticity, can be analysed.

  19. Dislocations, Plasticity and Metal Forming: Proceedings of PLASTICITY'03: The Tenth International Symposium on Plasticity and its Current Applications, A.A. Khan, R. Kazmi and J. Zhou (eds.). Maryland: NEAT Press.

    E-Print Network [OSTI]

    Aubertin, Michel

    Dislocations, Plasticity and Metal Forming: Proceedings of PLASTICITY'03: The Tenth International Symposium on Plasticity and its Current Applications, A.A. Khan, R. Kazmi and J. Zhou (eds.). Maryland: NEAT Press. 570 A UNIFIED MULTIAXIAL FORMULATION TO DESCRIBE YIELDING, PLASTIC POTENTIAL, AND LIMIT STATES

  20. Topological Effects of Synaptic Time Dependent Plasticity

    E-Print Network [OSTI]

    James R. Kozloski; Guillermo A. Cecchi

    2010-03-19T23:59:59.000Z

    We show that the local Spike Timing-Dependent Plasticity (STDP) rule has the effect of regulating the trans-synaptic weights of loops of any length within a simulated network of neurons. We show that depending on STDP's polarity, functional loops are formed or eliminated in networks driven to normal spiking conditions by random, partially correlated inputs, where functional loops comprise weights that exceed a non-zero threshold. We further prove that STDP is a form of loop-regulating plasticity for the case of a linear network comprising random weights drawn from certain distributions. Thus a notable local synaptic learning rule makes a specific prediction about synapses in the brain in which standard STDP is present: that under normal spiking conditions, they should participate in predominantly feed-forward connections at all scales. Our model implies that any deviations from this prediction would require a substantial modification to the hypothesized role for standard STDP. Given its widespread occurrence in the brain, we predict that STDP could also regulate long range synaptic loops among individual neurons across all brain scales, up to, and including, the scale of global brain network topology.

  1. A Development Process for Plastic User Interfaces David Thevenin, Galle Calvary, Jolle Coutaz,

    E-Print Network [OSTI]

    A Development Process for Plastic User Interfaces David Thevenin, Gaëlle Calvary, Joëlle Coutaz of plastic user interfaces. 2. Plasticity The term plasticity is inspired from the property of materials to HCI, plasticity is the "capacity of an interactive system to withstand variations of context of use

  2. Waste Plastics as Fuel The concept of PlastofuelTM is the use of waste

    E-Print Network [OSTI]

    Demirel, Melik C.

    Waste Plastics as Fuel The concept of PlastofuelTM is the use of waste agricultural plastic as a fuel source. The PlastofuelTM process creates a dense plastic nugget of compressed shredded plastic that can be burned cleanly in a high temperature combustion process. The shredded plastic is composed

  3. Plastic deformation in Al (Cu) interconnects stressed by electromigration and studied by synchrotron polychromatic X-ray microdiffraction

    E-Print Network [OSTI]

    Chen, Kai; Advanced Light Source; UCLA

    2008-01-01T23:59:59.000Z

    Plastic deformation in Al (Cu) interconnects stressed bygrain orientation [7], study plastic deformation [12-15] andThis aspect of EM-induced plastic deformation in grains

  4. THE RESPONSE OF SOLIDS TO ELASTIC/PLASTIC INDENTATION AND THE APPLICATION OF INDENTATION TO ADHESION MEASUREMENTS

    E-Print Network [OSTI]

    Chiang, Shu-Sheng

    2013-01-01T23:59:59.000Z

    676. Table I. Normalized Plastic Zone Size (B) and Material Initial - - Elastic/ plastic bounda ---- Cavi in rfaceCTIONAL VIEW XBLSOI Fig. I-9 Plastic Boundary solu/ Initial

  5. Micrographic detection of plastic deformation in nickel base alloys

    DOE Patents [OSTI]

    Steeves, Arthur F. (Schenectady, NY); Bibb, Albert E. (Clifton Park, NY)

    1984-01-01T23:59:59.000Z

    A method for detecting low levels of plastic deformation in metal articles comprising electrolytically etching a flow free surface of the metal article with nital at a current density of less than about 0.1 amp/cm.sup.2 and microscopically examining the etched surface to determine the presence of alternating striations. The presence of striations indicates plastic deformation in the article.

  6. Plastic Bags to Batteries: A Green Chemistry Solution

    ScienceCinema (OSTI)

    None

    2013-04-19T23:59:59.000Z

    Plastic bags are the scourge of roadsides, parking lots and landfills. But chemistry comes to the rescue! At Argonne National Laboratory, Vilas Pol has found a way to not only recycle plastic bags--but make them into valuable batteries for cell phones and laptops.

  7. Principles of Experience-Dependent Neural Plasticity: Implications for

    E-Print Network [OSTI]

    Jones, Theresa A.

    Principles of Experience-Dependent Neural Plasticity: Implications for Rehabilitation After Brain and considerations in applying them to the damaged brain. Method: Neuroscience research using a variety of models. Results: Neural plasticity is believed to be the basis for both learning in the intact brain

  8. Zo Rebecca Hunter Plasticity of the adult human brain

    E-Print Network [OSTI]

    Kallenrode, May-Britt

    Zoë Rebecca Hunter Plasticity of the adult human brain and motor recovery after stroke PICS © Institute of Cognitive Science #12;1 Bachelor's Thesis Plasticity of the adult human brain and motor brain and motor recovery after stroke 2 Abstract Stroke may cause a major destruction of brain tissue

  9. DESCRIBING THE PLASTIC DEFORMATION OF ALUMINUM SOFTBALL BATS

    E-Print Network [OSTI]

    Smith, Lloyd V.

    DESCRIBING THE PLASTIC DEFORMATION OF ALUMINUM SOFTBALL BATS E. BIESEN1 AND L. V. SMITH2 Washington-mail: lvsmith@wsu.edu Hollow aluminum bats were introduced over 30 years ago to provide improved durability over durability. Accordingly, the plastic deformation from a ball impact of a single-wall aluminum bat

  10. Development/Plasticity/Repair Identification of Nicotinic Acetylcholine Receptor Recycling

    E-Print Network [OSTI]

    Alford, Simon

    Development/Plasticity/Repair Identification of Nicotinic Acetylcholine Receptor Recycling and Its, University of Michigan, Ann Arbor, Michigan 48109 In the CNS, receptor recycling is critical for synaptic plasticity; however, the recycling of receptors has never been observed at peripheral synapses. Using a novel

  11. Mechanisms of ocular dominance plasticity in the juvenile and adult mouse visual cortex

    E-Print Network [OSTI]

    Khibnik, Lena A

    2011-01-01T23:59:59.000Z

    Ocular dominance (OD) plasticity is a classic example of bidirectional experience-dependent plasticity in the primary visual cortex. This form of plasticity is most robust during early postnatal development (termed the ...

  12. Elastic-plastic analysis of the transition divertor joint for high performance divertor target plate

    E-Print Network [OSTI]

    Navaei, Dara

    2011-01-01T23:59:59.000Z

    locations of principal plastic strains in 3D warm and coldthe ARIES Team Elastic-Plastic analysis of the transitionSAN DIEGO Elastic-Plastic Analysis of the Transition

  13. Plastic, the Great Pacific Garbage Patch, and International Misfires at a Cure

    E-Print Network [OSTI]

    Harse, Grant A.

    2011-01-01T23:59:59.000Z

    Environmental Implication of Plastic Debris in Marineat 2014. Consumption of plastics by marine animals has beenC. Thompson et al. , Our Plastic Age, 364 PhIL. TRANSAc--

  14. Plastic collapse of lattice structures under a general stress state Babak Haghpanah, Jim Papadopoulos, Ashkan Vaziri

    E-Print Network [OSTI]

    Vaziri, Ashkan

    Plastic collapse of lattice structures under a general stress state Babak Haghpanah, Jim 22 August 2013 Available online 19 September 2013 Keywords: Plastic collapse strength Lattice minimization procedure to determine the macroscopic `plastic col- lapse strength' of a tessellated cellular

  15. Modeling Elasto-Plastic Behavior of Polycrystalline Grain Structure of Steels at Mesoscopic Level

    E-Print Network [OSTI]

    Cizelj, Leon

    Modeling Elasto-Plastic Behavior of Polycrystalline Grain Structure of Steels at Mesoscopic Level. The constitutive model of crystal grains utilizes anisotropic elasticity and crystal plasticity. Commercially be considered macroscopically homogeneous. Elastic and rate independent plastic deformation modes are considered

  16. Effects of mechanical properties and surface friction on elasto-plastic sliding contact

    E-Print Network [OSTI]

    Suresh, Subra

    Effects of mechanical properties and surface friction on elasto-plastic sliding contact S and many recent computational studies have established quantitative relationships between elasto-plastic systematically quantified the effect of the plastic deformation characteristics on the frictional sliding

  17. Plasticity of metal wires in torsion: molecular dynamics and dislocation dynamics simulations

    E-Print Network [OSTI]

    Cai, Wei

    Plasticity of metal wires in torsion: molecular dynamics and dislocation dynamics simulations-4040 Abstract The orientation dependent plasticity in metal nanowires is investigated using molecular dynamics metal wires controls the mechanisms of plastic deformation. For wires oriented along 110 , dislocations

  18. Measurement of large strains in ropes using plastic optical fibers

    DOE Patents [OSTI]

    Williams, Jerry Gene; Smith, David Barton; Muhs, Jeffrey David

    2006-02-14T23:59:59.000Z

    A method for the direct measurement of large strains in ropes in situ using a plastic optical fiber, for example, perfluorocarbon or polymethyl methacrylate and Optical Time-Domain Reflectometer or other light time-of-flight measurement instrumentation. Protective sheaths and guides are incorporated to protect the plastic optical fiber. In one embodiment, a small rope is braided around the plastic optical fiber to impose lateral compressive forces to restrain the plastic optical fiber from slipping and thus experience the same strain as the rope. Methods are described for making reflective interfaces along the length of the plastic optical fiber and to provide the capability to measure strain within discrete segments of the rope. Interpretation of the data allows one to calculate the accumulated strain at any point in time and to determine if the rope has experienced local damage.

  19. The Anatomy of Plastic Events in Magnetic Amorphous Solids

    E-Print Network [OSTI]

    H. George E. Hentschel; Itamar Procaccia; Bhaskar Sen Gupta

    2015-01-25T23:59:59.000Z

    Plastic events in amorphous solids can be much more than just "shear transformation zones" when the positional degrees of freedom are coupled non-trivially to other degrees of freedom. Here we consider magnetic amorphous solids where mechanical and magnetic degrees of freedom interact, leading to rather complex plastic events whose nature must be disentangled. In this paper we uncover the anatomy of the various contributions to some typical plastic events. These plastic events are seen as Barkhausen Noise or other "serrated noises". Using theoretical considerations we explain the observed statistics of the various contributions to the considered plastic events. The richness of contributions and their different characteristics imply that in general the statistics of these "serrated noises" cannot be universal, but rather highly dependent on the state of the system and on its microscopic interactions.

  20. The Use of Energy Information in Plastic Scintillator Material

    SciTech Connect (OSTI)

    Ely, James H.; Anderson, Kevin K.; Bates, Derrick J.; Kouzes, Richard T.; Lopresti, Charles A.; Runkle, Robert C.; Siciliano, Edward R.; Weier, Dennis R.

    2008-06-15T23:59:59.000Z

    Plastic scintillator material is often used for gamma-ray detection in many applications due to its relatively good sensitivity and cost-effectiveness compared to other detection materials. However, due to the dominant Compton scattering interaction mechanism, full energy peaks are not observed in plastic scintillator spectra and isotopic identification is impossible. Typically plastic scintillator detectors are solely gross count detectors. In some safeguards and security applications, such as radiation portal monitors for vehicle screening, naturally-occurring radioactive material (NORM) often triggers radiation alarms and results in innocent or nuisance alarms. The limited energy information from plastic scintillator material can be used to discriminate the NORM from targeted materials and reduce the nuisance alarm rate. An overview of the utilization of the energy information from plastic scintillator material will be presented, with emphasis on the detection capabilities and potential limitations for safeguards and security applications. (PIET-43741-TM-490)

  1. The plasticity of TGF-beta signaling

    E-Print Network [OSTI]

    Geraldine Celliere; Georgios Fengos; Marianne Herve; Dagmar Iber

    2011-11-02T23:59:59.000Z

    The family of TGFb ligands is large and its members are involved in many different signaling processes. These signaling processes strongly differ in type with TGFb ligands eliciting both sustained or transient responses. Members of the TGFb family can also act as morphogen and cellular responses would then be expected to provide a direct read-out of the extracellular ligand concentration. We were interested to define the set of minimal modifications that are required to change the type of signal processing in the TGFb signaling network. To define the key aspects for signaling plasticity we focused on the core of the TGFb signaling network. With the help of a parameter screen we identified ranges of kinetic parameters and protein concentrations that give rise to transient, sustained, or oscillatory responses to constant stimuli, as well as those parameter ranges that enable a proportional response to time-varying ligand concentrations (as expected in the read-out of morphogens). A combination of a strong negative feedback and fast shuttling to the nucleus biases signaling to a transient rather than a sustained response, while oscillations were obtained if ligand binding to the receptor is weak and the turn-over of the I-Smad is fast. A proportional read-out required inefficient receptor activation in addition to a low affinity of receptor-ligand binding. We find that targeted modification of single parameters suffices to alter the response type. The architecture of the TGFb pathway enables the observed signaling plasticity. The observed range of signaling outputs to TGFb ligand in different cell types and under different conditions can be explained with differences in cellular protein concentrations and with changes in effective rate constants due to cross-talk with other signaling pathways.

  2. Inspection of Fusion Joints in Plastic Pipe

    SciTech Connect (OSTI)

    Connie Reichert

    2005-09-01T23:59:59.000Z

    The standard method of joining plastic pipe in the field is the butt fusion process. As in any pipeline application, joint quality greatly affects overall operational safety of the system. Currently no simple, reliable, cost-effective method exists for assessing the quality of fusion joints in the field. Visual examination and pressure testing are current nondestructive approaches, which do not provide any assurance about the long-term pipeline performance. This project developed, demonstrated, and validated an in-situ nondestructive inspection method for butt fusion joints in gas distribution plastic pipelines. The inspection system includes a laser-based image-recognition system that automatically generates and interprets digital images of pipe joints and assigns them a pass/fail rating, which eliminates operator bias in evaluating joint quality. An EWI-patented process, the Weld Zone Inspection Method (WZIM) was developed in which local heat is applied to the joint region to relax the residual stresses formed by the original joining operation, which reveals the surface condition of the joint. In cases where the joint is not formed under optimal conditions, and the intermolecular forces between contacting surfaces are not strong enough, the relaxation of macromolecules in the surface layer causes the material to pull back, revealing a fusion line. If the joint is sound, the bond line image does not develop. To establish initial feasibility of the approach, welds were performed under standard and nonstandard conditions. These welds were subjected to the WZIM and two destructive forms of testing: short-term tensile testing and long-term creep rupture testing. There appears to be a direct correlation between the WZIM and the destructive testing results. Although WZIM appears to be more sensitive than destructive testing can verify, the approach appears valid.

  3. Learning and Plasticity Plasticity in neuronal circuits means the ability for connections to change and remain changed.

    E-Print Network [OSTI]

    Miller, Paul

    Learning and Plasticity Plasticity in neuronal circuits means the ability for connections to change an axon of cell A is near enough to excite cell B or repeatedly or consistently takes part in firing it of the cells in firing B, is increased. Sometimes summarized as "cells that fire together wire together." Rate

  4. Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 APPLICATION OF PLASTICITY THEORY TO REINFORCED

    E-Print Network [OSTI]

    Burgoyne, Chris

    Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 rd July, 2007 11 APPLICATION OF PLASTICITY THEORY TO REINFORCED CONCRETE DEEP BEAMS Ashraf ASHOUR 1 Keun-and-tie, mechanism, capacity. 1 INTRODUCTION Reinforced concrete deep beams are fairly common structural elements

  5. JOINING ADVANCED MATERIALS BY PLASTIC FLOW PROVIDES SOLUTION FOR OXYGEN SENSOR APPLICATIONS

    E-Print Network [OSTI]

    Kemner, Ken

    JOINING ADVANCED MATERIALS BY PLASTIC FLOW PROVIDES SOLUTION FOR OXYGEN SENSOR APPLICATIONS's unique plastic deformation process. · Abilitytodeploymultipleoxygen sensors (due to their lower cost

  6. E-Print Network 3.0 - alliances functional plasticity Sample...

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

    plastics... , their environmental effects, and the possible solutions to the problem of pollution by plastics. ... Source: Cohen, Itai - Department of Physics, Cornell University...

  7. Plastic, the Great Pacific Garbage Patch, and International Misfires at a Cure

    E-Print Network [OSTI]

    Harse, Grant A.

    2011-01-01T23:59:59.000Z

    90% of world plastic material demands. Anthony L. Andrady &a result, the world-wide demand for plastics was expected to

  8. EFFECT OF GRAIN SIZE ON THE ACOUSTIC EMISSION GENERATED DURING PLASTIC DEFORMATION OF ALUMINUM

    E-Print Network [OSTI]

    Baram, J.

    2013-01-01T23:59:59.000Z

    PLASTIC DEFORMATION OF ALUMINUM LAWRENCE BERKELEY LABORATORYDURING PLASTIC DEFORMATION OF ALUMINUM J. Baram Materialsof polycrystalline aluminum, of different grain sizes and at

  9. THE PERFORMANCE AND MODIFICATION OF RECYCLED ELECTRONIC WASTE PLASTICS FOR THE IMPROVEMENT OF ASPHALT PAVEMENT MATERIALS.

    E-Print Network [OSTI]

    Colbert, Baron W.

    2012-01-01T23:59:59.000Z

    ?? Bulk electric waste plastics were recycled and reduced in size into plastic chips before pulverization or cryogenic grinding into powders. Two major types of (more)

  10. E-Print Network 3.0 - active site plasticity Sample Search Results

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

    Energy 5 In my view, there are three fundamental questions that serve to motivate and guide future plasticity stud- Summary: , sites or habitats. Mechanisms of plastic response...

  11. E-Print Network 3.0 - associative synaptic plasticity Sample...

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

    stages. Key words: Hebbian plasticity; synaptic weights; synaptic com- petition... trains of C( t) 1N ( t). Plasticity was ... Source: Bi, Guo-Qiang - Department of...

  12. E-Print Network 3.0 - altered synaptic plasticity Sample Search...

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

    stages. Key words: Hebbian plasticity; synaptic weights; synaptic com- petition... trains of C( t) 1N ( t). Plasticity was ... Source: Bi, Guo-Qiang - Department of...

  13. Universality of the Plastic Instability in Strained Amorphous Solids

    E-Print Network [OSTI]

    Ratul Dasgupta; Smarajit Karmakar; Itamar Procaccia

    2011-11-03T23:59:59.000Z

    By comparing the response to external strains in metallic glasses and in Lenard-Jones glasses we find a quantitative universality of the fundamental plastic instabilities in the athermal, quasistatic limit. Microscopically these two types of glasses are as different as one can imagine, the latter being determined by binary interactions, whereas the former by multiple interactions due to the effect of the electron gas that cannot be disregarded. In spite of this enormous difference the plastic instability is the same saddle-node bifurcation. As a result the statistics of stress and energy drops in the elasto-plastic steady state are universal, sharing the same system-size exponents.

  14. Process for the recovery and separation of plastics

    DOE Patents [OSTI]

    Jody, Bassam J.; Daniels, Edward J.; Pomykala Jr., Joseph A.

    2003-07-29T23:59:59.000Z

    A method of separating a portion of acrylonitrile-butadiene-styrene (ABS) from a mixture containing ABS and for separating a portion of ABS and polycarbonate (PC) from a mixture of plastics containing ABS and PC is disclosed. The method includes shredding and/or granulating the mixture of plastics containing ABS and PC to provide a selected particle size; sequentially dispersing the shredded mixture of plastics in a series aqueous solutions having different specific gravities and separating the floating fraction until the desired separation is obtained. Surface tension and pH are also variable to be controlled.

  15. High reliability plastic packaging for microelectronics

    SciTech Connect (OSTI)

    Sweet, J.N.; Peterson, D.W.; Hsia, A.H.; Tuck, M.

    1997-07-01T23:59:59.000Z

    Goal was Assembly Test Chips (ATCs) which could be used for evaluating plastic encapsulation technologies. Circuits were demonstrated for measuring Au-Al wirebond and Al metal corrosion failure rates during accelerated temperature and humidity testing. The test circuits on the ATC02.5 chip were very sensitive to extrinsic or processing induced failure rates. Accelerated aging experiments were conducted with unpassivated triple track Al structures on the ATC02.6 chip; the unpassivated tracks were found to be very sensitive to particulate contamination. Some modifications to existing circuitry were suggested. The piezoresistive stress sensing circuitry designed for the ATC04 test chip was found suitable for determining the change in the state of mechanical stress at the die when both initial and final measurements were made near room temperature (RT). Attempt to measure thermal stress between RT and a typical polymer glass transition temperature failed because of excessive die resistor- substrate leakage currents at the high temperature end; suitable circuitry changes were developed to overcome this problem. One temperature and humidity experiment was conducted with Sandia developed static radom access memory parts to examine non-corrosion CMOS failures; this objective was not achieved, but corrosion failure at the metal to Si contacts on the die surface could be detected. This 2-year effort resulted in new designs for test circuits which could be used on an advanced ATC for reliability assessment in Defense Programs electronics development projects.

  16. Fabrication of amorphous metal matrix composites by severe plastic deformation

    E-Print Network [OSTI]

    Mathaudhu, Suveen Nigel

    2006-10-30T23:59:59.000Z

    Bulk metallic glasses (BMGs) have displayed impressive mechanical properties, but the use and dimensions of material have been limited due to critical cooling rate requirements and low ductility. The application of severe plastic deformation...

  17. Cyclic Plasticity under Shock Loading in an HCP Metal

    SciTech Connect (OSTI)

    Prime, Michael B. [Los Alamos National Laboratory; Hunter, Abigail [Los Alamos National Laboratory; Canfield, Thomas R. [Los Alamos National Laboratory; Adams, Chris D. [Los Alamos National Laboratory

    2012-06-08T23:59:59.000Z

    Plate impact experiments with pressures from 2 to 20 GPa, including one shock-partial release-reshock experiment, were performed on vacuum hot-pressed S-200F Beryllium. This hexagonal close-packed (HCP) metal shows significant plasticity effects in such conditions. The experiments were modeled in a Lagrangian hydrocode using an experimentally calibrated Preston-Tonks-Wallace (PTW) constitutive model. By using the shock data to constrain a high rate portion of PTW, the model was able to generally match plasticity effects on the measured wave profile (surface velocity) during the shock loading, but not unloading. A backstress-based cyclic plasticity model to capture the quasi-elastic release (Bauschinger-type effect) was explored in order to match the unloading and reloading portions of the measured wave profiles. A comparison is made with other approaches in the literature to capture the cyclic plasticity in shock conditions.

  18. Kinematic quantities of finite elastic and plastic deformation

    E-Print Network [OSTI]

    T. Flp; P. Vn

    2012-03-05T23:59:59.000Z

    Kinematic quantities for finite elastic and plastic deformations are defined via an approach that does not rely on auxiliary elements like reference frame and reference configuration, and that gives account of the inertial-noninertial aspects explicitly. These features are achieved by working on Galilean spacetime directly. The quantity expressing elastic deformations is introduced according to its expected role: to measure how different the current metric is from the relaxed/stressless metric. Further, the plastic kinematic quantity is the change rate of the stressless metric. The properties of both are analyzed, and their relationship to frequently used elastic and plastic kinematic quantities is discussed. One important result is that no objective elastic or plastic quantities can be defined from deformation gradient.

  19. Plastic flow of foams and emulsions in a channel

    E-Print Network [OSTI]

    Dollet, B; Sbragaglia, M

    2014-01-01T23:59:59.000Z

    In order to understand the flow profiles of complex fluids, a crucial issue concerns the emergence of spatial correlations among plastic rearrangements exhibiting cooperativity flow behaviour at the macroscopic level. In this paper, the rate of plastic events in a Poiseuille flow is experimentally measured on a confined foam in a Hele-Shaw geometry. The correlation with independently measured velocity profiles is quantified. To go beyond a limitation of the experiments, namely the presence of wall friction which complicates the relation between shear stress and shear rate, we compare the experiments with simulations of emulsion droplets based on the lattice-Boltzmann method, which are performed both with, and without, wall friction. Our results indicate a correlation between the localisation length of the velocity profiles and the localisation length of the number of plastic events. Finally, unprecedented results on the distribution of the orientation of plastic events show that there is a non-trivial correla...

  20. alveolata reveals plasticity: Topics by E-print Network

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

    coefficient. The contact-load-bearing capacitySteady-state frictional sliding contact on surfaces of plastically graded materials A. Prasad a,1 the mechanics of steady-state...

  1. Experimental assessment of unvalidated assumptions in classical plasticity theory.

    SciTech Connect (OSTI)

    Brannon, Rebecca Moss (University of Utah, Salt Lake City, UT); Burghardt, Jeffrey A. (University of Utah, Salt Lake City, UT); Bauer, Stephen J.; Bronowski, David R.

    2009-01-01T23:59:59.000Z

    This report investigates the validity of several key assumptions in classical plasticity theory regarding material response to changes in the loading direction. Three metals, two rock types, and one ceramic were subjected to non-standard loading directions, and the resulting strain response increments were displayed in Gudehus diagrams to illustrate the approximation error of classical plasticity theories. A rigorous mathematical framework for fitting classical theories to the data, thus quantifying the error, is provided. Further data analysis techniques are presented that allow testing for the effect of changes in loading direction without having to use a new sample and for inferring the yield normal and flow directions without having to measure the yield surface. Though the data are inconclusive, there is indication that classical, incrementally linear, plasticity theory may be inadequate over a certain range of loading directions. This range of loading directions also coincides with loading directions that are known to produce a physically inadmissible instability for any nonassociative plasticity model.

  2. Plastic wastes as modifiers of the thermoplasticity of coal

    SciTech Connect (OSTI)

    M.A. Diez; C. Barriocanal; R. Alvarez [Instituto Nacional del Carbon (INCAR), Oviedo (Spain)

    2005-12-01T23:59:59.000Z

    Plastic waste recycling represents a major challenge in environmental protection with different routes now available for dealing with mechanical, chemical, and energy recycling. New concepts in plastic waste recycling have emerged so that now such wastes can be used to replace fossil fuels, either as an energy source or as a secondary raw material. Our objective is to explore the modification of the thermoplastic properties of coal in order to assess the possibility of adding plastic waste to coal for the production of metallurgical coke. Two bituminous coals of different rank and thermoplastic properties were used as a base component of blends with plastic wastes such as high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), poly(ethylene terephthalate) (PET), and acrilonitrile-butadiene-styrene copolymer (ABS). In all cases, the addition of plastic waste led to a reduction in Gieseler maximum fluidity, the extent of the reduction depending on the fluidity of the base coal, and the amount, the molecular structure, and the thermal behavior of the polymer. As a consequence, the amount of volatile matter released by the plastic waste before, during, and after the maximum fluidity of the coal and the hydrogen-donor and hydrogen-acceptor capacities of the polymer were concluded to be key factors in influencing the extent of the reduction in fluidity and the development of anisotropic carbons. The incorporation of the plastic to the carbon matrix was clearly established in semicokes produced from blends of a high-fluid coal and the plastic tested by SEM examination. 42 refs., 10 figs., 7 tabs.

  3. Photoconversion of gasified organic materials into biologically-degradable plastics

    DOE Patents [OSTI]

    Weaver, Paul F. (Golden, CO); Maness, Pin-Ching (Golden, CO)

    1993-01-01T23:59:59.000Z

    A process is described for converting organic materials (such as biomass wastes) into a bioplastic suitable for use as a biodegradable plastic. In a preferred embodiment the process involves thermally gasifying the organic material into primarily carbon monoxide and hydrogen, followed by photosynthetic bacterial assimilation of the gases into cell material. The process is ideally suited for waste recycling and for production of useful biodegradable plastic polymer.

  4. Photoconversion of gasified organic materials into biologically-degradable plastics

    DOE Patents [OSTI]

    Weaver, P.F.; Pinching Maness.

    1993-10-05T23:59:59.000Z

    A process is described for converting organic materials (such as biomass wastes) into a bioplastic suitable for use as a biodegradable plastic. In a preferred embodiment the process involves thermally gasifying the organic material into primarily carbon monoxide and hydrogen, followed by photosynthetic bacterial assimilation of the gases into cell material. The process is ideally suited for waste recycling and for production of useful biodegradable plastic polymer. 3 figures.

  5. Design and Development of a Plastic Film Heat Exchanger

    E-Print Network [OSTI]

    Guyer, E. C.; Gollin, M. K.; Brownell, D. L.

    of the PFHX technology in olving heat. exchange at any pressure other than'atmo pheric pressure. Atmospheric applications could ope ate with a simple remote level control basin. There are also many other potential appl ca tions of the PFHX technology...DESIGN AND DEVELOPMENT OF A PLASTIC FILM HEAT EXCHANGER Eric C. Guyer, Sc.D., David L. Brownell, and Martin K. Gollin Dynatech RID Company Cambridge, Massachusetts ABSTRACT A plastic film heat exchang.er (PFHX) utilizes the low cost...

  6. Low temperature fracture evaluation of plasticized sulfur paving mixtures

    E-Print Network [OSTI]

    Mahboub, Kamyar

    2012-06-07T23:59:59.000Z

    May 1985 Major Subject: Civil Engineering LOW TEMPERATURE FRACTURE EVALUATION OF PLASTICIZED SULFUR PAVING MIXTURES A Thesis by KAMYAR MAHBOUB Approved as to style and content by: Dallas N. Li tie (Chai rman of Committee) Ro e . Lytto Member... modifications to the standard ASTM procedure. These modifications were required due to the nature of plasticized sulfur mixtures and asphalt cement mixtures. The J-integral version of Paris ' law was successfully used to characterize the fatigue...

  7. Redesigning Process Cooling Systems in the Plastics Industry

    E-Print Network [OSTI]

    Anderson, G. R.

    2006-01-01T23:59:59.000Z

    towers during the winter. Lifetimes electric provider, Utah Power, manages a demand side management program (DSM) and hired etc Group, Inc to evaluate the cooling systems for potential energy efficiency improvements. etc Group, Inc and Lifetime... basketball systems in 1973 and became Lifetime Products in 1986. Lifetime introduced the first blow-molded plastic table in 1995. In the 120,000 square foot Clearfield, UT facility discussed in this paper, Lifetime blow molds plastic folding tables...

  8. Super-Elastic and Plastic Shock Waves Generated by Lasers N.A. Inogamov a,1

    E-Print Network [OSTI]

    Fominov, Yakov

    Super-Elastic and Plastic Shock Waves Generated by Lasers N.A. Inogamov a,1 , V.V. Zhakhovsky b,3 fortov@ihed.ras.ru, i oleynik@usf.edu Keywords: Femtosecond laser-matter interactions, elastic-plastic there is an elastic shock wave (SW), which propagates before the strong plastic shock with plastic pressures of up

  9. Letters to Analytical Chemistry Silver Nanoparticles on a Plastic Platform for

    E-Print Network [OSTI]

    Brolo, Alexandre G.

    Letters to Analytical Chemistry Silver Nanoparticles on a Plastic Platform for Localized Surface on plastics is described. The silver-nanopar- ticles-on-plastic sensor (SNOPS) was fabricated by chemi- cally modifying the surface of a common plastic, polyeth- yleneterephthalate

  10. Short Channel Amorphous-Silicon TFT's on High-Temperature Clear Plastic Substrates

    E-Print Network [OSTI]

    Short Channel Amorphous-Silicon TFT's on High-Temperature Clear Plastic Substrates K. Long, H@princeton.edu To achieve light-weight flexible AMOLED displays on plastic substrates, the substratesmust be optically clear for plastic. High-temperature plastics such as polyimide (e.g. KaptonB E) have a glass transition temperature

  11. Phenomenological study of parabolic and spherical indentation of elastic-ideally plastic material

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Phenomenological study of parabolic and spherical indentation of elastic-ideally plastic material O ideally plastic materials was carried out by using precise results of finite elements calculations behaviour is found. Two elastic-plastic regimes and two plastic regimes are observed for materials of very

  12. Size effects on the onset of plastic deformation during nanoindentation of thin films and patterned lines

    E-Print Network [OSTI]

    Van Vliet, Krystyn J.

    Size effects on the onset of plastic deformation during nanoindentation of thin films and patterned; accepted 13 August 2003 Plastic deformation of materials exhibits a strong size dependence when, particularly the transition from elastic to plastic deformation and the early stages of plastic deformation. We

  13. A Performance-Based Approach to the Development of a Recycled Plastic/Composite Crosstie

    E-Print Network [OSTI]

    A Performance-Based Approach to the Development of a Recycled Plastic/Composite Crosstie Thomas Nosker, Ph.D., Richard Renfree Ph.D., and Jennifer Lynch Plastics & Composites Group, Rutgers University Introduction In 1994, Rutgers University's Plastics and Composites Group, formerly the Center for Plastics

  14. PLASTIC RESINS INDUSTRY HIT HARD BY GLOBAL ECONOMIC RECESSION IN 2008

    E-Print Network [OSTI]

    Laughlin, Robert B.

    , but buying only 4.5 billion pounds per month. Although the demand for plastics is ultimately tied to overallPLASTIC RESINS INDUSTRY HIT HARD BY GLOBAL ECONOMIC RECESSION IN 2008 The US plastic resins in the second half of the year. According to the American Chemistry Council (ACC) Plastics Industry Producers

  15. CYCLIC PLASTICITY OF A CRACKED STRUCTURE SUBJECTED TO MIXED MODE LOADING

    E-Print Network [OSTI]

    CYCLIC PLASTICITY OF A CRACKED STRUCTURE SUBJECTED TO MIXED MODE LOADING Sylvie Pommier1, a 1 LMT, mixed mode crack propagation, plasticity, crack deflection. Abstract. Cyclic plasticity in the crack tip stresses in the overload's plastic zone. Moreover, if the overload's ratio is large enough, the crack may

  16. PLASTICITY OF ORIENTATION PROCESSING IN ADULT VISUAL CORTEX Valentin Dragoi and Mriganka Sur

    E-Print Network [OSTI]

    Sur, Mriganka

    1 PLASTICITY OF ORIENTATION PROCESSING IN ADULT VISUAL CORTEX Valentin Dragoi and Mriganka Sur title: Orientation plasticity in V1 No. of figures: 5 Address correspondence to: Mriganka Sur Department by experience, a phenomenon termed "plasticity", has been accumulating steadily. The first reports of plasticity

  17. Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 PLASTICITY APPLICATIONS IN REINFORCED CONCRETE AND

    E-Print Network [OSTI]

    Burgoyne, Chris

    a range of reinforced and or prestressed concrete structures consisting of tower crane foundations, wind: plasticity, prestressed concrete, serviceability, turbine foundation, offshore structures 1 INTRODUCTION turbine foundations, building floors and offshore structures. The case studies have been chosen based

  18. Results obtained using the Plastic Ball

    SciTech Connect (OSTI)

    Ritter, H.G.; Gustafsson, H.A.; Gutbrod, H.H.

    1983-08-01T23:59:59.000Z

    Single-particle inclusive experiments, and experiments that additionally measure a few correlations like the associated multiplicity, have provided the main contribution to our present understanding of high-energy heavy-ion collisions. The results from those experiments are in overall agreement with calculations of the cascade and hydrodynamical models. In the cascade model the collision of two nuclei is simulated as a cascade of nucleon-nucleon collisions using measured N-N cross sections. The hydrodynamical model, on the other hand, describes the nuclear collision as that of two fluids and makes use of a nuclear equation of state relating thermal and compressional energy densities to pressure. The pressure field dominates the expansion phase and leads to collective flow of the reaction products in a preferred direction. The observation of such effects in inclusive experiments is not well established. Collective effects that manifest themselves in the shape of the event in phase space are expected to be seen best in complete event detectors that measure the final state as exclusively as presently possible by measuring most of the charged particles emitted in the reaction. In addition, those detectors are well suited to test macroscopic concepts such as equilibrium and temperature. Global methods like the sphericity or thrust analysis take into account all the correlations measured in the event and are specially designed to determine the shape of an event in phase space and thus to define a reaction plane. Recent data from the Plastic Ball experiment about the study of nuclear stopping and thermalization and on global analysis are presented.

  19. Method of determining elastic and plastic mechanical properties of ceramic materials using spherical indenters

    DOE Patents [OSTI]

    Adler, Thomas A. (Corvallis, OR)

    1996-01-01T23:59:59.000Z

    The invention pertains a method of determining elastic and plastic mechanical properties of ceramics, intermetallics, metals, plastics and other hard, brittle materials which fracture prior to plastically deforming when loads are applied. Elastic and plastic mechanical properties of ceramic materials are determined using spherical indenters. The method is most useful for measuring and calculating the plastic and elastic deformation of hard, brittle materials with low values of elastic modulus to hardness.

  20. Plastic instabilities in statically and dynamically loaded spherical vessels

    SciTech Connect (OSTI)

    Duffey, Thomas A [Los Alamos National Laboratory; Rodriguez, Edward A [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Significant changes were made in design limits for pressurized vessels in the 2007 version of the ASME Code (Section VIII, Div. 3) and 2008 and 2009 Addenda. There is now a local damage-mechanics based strain-exhaustion limit as well as the well-known global plastic collapse limit. Moreover, Code Case 2564 (Section VIII, Div. 3) has recently been approved to address impulsively loaded vessels. It is the purpose of this paper to investigate the plastic collapse limit as it applies to dynamically loaded spherical vessels. Plastic instabilities that could potentially develop in spherical shells under symmetric loading conditions are examined for a variety of plastic constitutive relations. First, a literature survey of both static and dynamic instabilities associated with spherical shells is presented. Then, a general plastic instability condition for spherical shells subjected to displacement controlled and impulsive loading is given. This instability condition is evaluated for six plastic and visco-plastic constitutive relations. The role of strain-rate sensitivity on the instability point is investigated. Calculations for statically and dynamically loaded spherical shells are presented, illustrating the formation of instabilities as well as the role of imperfections. Conclusions of this work are that there are two fundamental types of instabilities associated with failure of spherical shells. In the case of impulsively loaded vessels, where the pulse duration is short compared to the fundamental period of the structure, one instability type is found not to occur in the absence of static internal pressure. Moreover, it is found that the specific role of strain-rate sensitivity on the instability strain depends on the form of the constitutive relation assumed.

  1. Plastics Avoiding Bisphenol-A (BPA) Why is there concern? Researchers are concerned that even at low levels, environmental estrogens

    E-Print Network [OSTI]

    Danforth, Bryan Nicholas

    is produced each year. About 60% is used in hard plastics (sports and baby bottles, sports equipment, auto plastic has been used to make plastic sports bottles and baby bottles · To find PC plastic, look in the dishwasher. DO hand wash PC bottles in mild detergent. · DO NOT use PC plastic bottles that are worn

  2. Method for formation of thin film transistors on plastic substrates

    DOE Patents [OSTI]

    Carey, Paul G. (Mountain View, CA); Smith, Patrick M. (San Ramon, CA); Sigmon, Thomas W. (Portola Valley, CA); Aceves, Randy C. (Livermore, CA)

    1998-10-06T23:59:59.000Z

    A process for formation of thin film transistors (TFTs) on plastic substrates replaces standard thin film transistor fabrication techniques, and uses sufficiently lower processing temperatures so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The process relies on techniques for depositing semiconductors, dielectrics, and metals at low temperatures; crystallizing and doping semiconductor layers in the TFT with a pulsed energy source; and creating top-gate self-aligned as well as back-gate TFT structures. The process enables the fabrication of amorphous and polycrystalline channel silicon TFTs at temperatures sufficiently low to prevent damage to plastic substrates. The process has use in large area low cost electronics, such as flat panel displays and portable electronics.

  3. Method for formation of thin film transistors on plastic substrates

    DOE Patents [OSTI]

    Carey, P.G.; Smith, P.M.; Sigmon, T.W.; Aceves, R.C.

    1998-10-06T23:59:59.000Z

    A process for formation of thin film transistors (TFTs) on plastic substrates replaces standard thin film transistor fabrication techniques, and uses sufficiently lower processing temperatures so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The process relies on techniques for depositing semiconductors, dielectrics, and metals at low temperatures; crystallizing and doping semiconductor layers in the TFT with a pulsed energy source; and creating top-gate self-aligned as well as back-gate TFT structures. The process enables the fabrication of amorphous and polycrystalline channel silicon TFTs at temperatures sufficiently low to prevent damage to plastic substrates. The process has use in large area low cost electronics, such as flat panel displays and portable electronics. 5 figs.

  4. Gradient Plasticity Model and its Implementation into MARMOT

    SciTech Connect (OSTI)

    Barker, Erin I.; Li, Dongsheng; Zbib, Hussein M.; Sun, Xin

    2013-08-01T23:59:59.000Z

    The influence of strain gradient on deformation behavior of nuclear structural materials, such as boby centered cubic (bcc) iron alloys has been investigated. We have developed and implemented a dislocation based strain gradient crystal plasticity material model. A mesoscale crystal plasticity model for inelastic deformation of metallic material, bcc steel, has been developed and implemented numerically. Continuum Dislocation Dynamics (CDD) with a novel constitutive law based on dislocation density evolution mechanisms was developed to investigate the deformation behaviors of single crystals, as well as polycrystalline materials by coupling CDD and crystal plasticity (CP). The dislocation density evolution law in this model is mechanism-based, with parameters measured from experiments or simulated with lower-length scale models, not an empirical law with parameters back-fitted from the flow curves.

  5. Natural gas transport by plastic pipes. (Latest citations from the Compendex database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    The bibliography contains citations concerning the use of plastic piping to transport natural gas or liquid propane gas. The interaction between gas odorants and plastic pipe, the effects of aging on plastic pipe used to transport gas, and pipe failure analyses are examined. Bending, joining, and repair methods are discussed. Composite reinforced plastic pipes and plastic coated pipes are considered. Polyethylene and epoxy composites are among the materials discussed. Gas main upgrading projects that replaced old pipes with plastic ones are briefly cited. (Contains a minimum of 88 citations and includes a subject term index and title list.)

  6. Nonlinear elasto-plastic model for dense granular flow

    E-Print Network [OSTI]

    Ken Kamrin

    2009-05-07T23:59:59.000Z

    This work proposes a model for granular deformation that predicts the stress and velocity profiles in well-developed dense granular flows. Recent models for granular elasticity (Jiang and Liu 2003) and rate-sensitive plastic flow (Jop et al. 2006) are reformulated and combined into one universal granular continuum law, capable of predicting flowing regions and stagnant zones simultaneously in any arbitrary 3D flow geometry. The unification is performed by justifying and implementing a Kroner-Lee elasto-plastic decomposition, with care taken to ensure certain continuum physical principles are necessarily upheld. The model is then numerically implemented in multiple geometries and results are compared to experiments and discrete simulations.

  7. Discontinuous Galerkin finite element methods for gradient plasticity.

    SciTech Connect (OSTI)

    Garikipati, Krishna. (University of Michigan, Ann Arbor, MI); Ostien, Jakob T.

    2010-10-01T23:59:59.000Z

    In this report we apply discontinuous Galerkin finite element methods to the equations of an incompatibility based formulation of gradient plasticity. The presentation is motivated with a brief overview of the description of dislocations within a crystal lattice. A tensor representing a measure of the incompatibility with the lattice is used in the formulation of a gradient plasticity model. This model is cast in a variational formulation, and discontinuous Galerkin machinery is employed to implement the formulation into a finite element code. Finally numerical examples of the model are shown.

  8. Assessing the benefits of design for recycling for plastics in electronics: A case study of computer enclosures

    E-Print Network [OSTI]

    Masanet, Eric; Horvath, Arpad

    2007-01-01T23:59:59.000Z

    Ten facts to know about plastics from consumer electronics,E.F. Stefanacci, Designing with plastics: considering partpp. 5460. [6] American Plastics Council, A design guide for

  9. SPEECH-CODING AND TRAINING-INDUCED PLASTICITY IN AUDITORY CORTEX OF NORMAL AND DYSLEXIA

    E-Print Network [OSTI]

    Kilgard, Michael P.

    SPEECH-CODING AND TRAINING-INDUCED PLASTICITY IN AUDITORY CORTEX OF NORMAL AND DYSLEXIA MODEL RATS anymore... #12;SPEECH-CODING AND TRAINING-INDUCED PLASTICITY IN AUDITORY CORTEX OF NORMAL AND DYSLEXIA

  10. Hydraulic Interaction between Geosynthetic Drainage Layers and Unsaturated Low Plasticity Clay

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    1 Hydraulic Interaction between Geosynthetic Drainage Layers and Unsaturated Low Plasticity Clay of soil density on the hydraulic interaction between unsaturated, low plasticity clay and geosynthetic drainage layers. The hydraulic interaction was evaluated using the system hydraulic conductivity, moisture

  11. The unfinished miracle : how plastics came to be lost at sea

    E-Print Network [OSTI]

    Martinez, Amanda Rose

    2010-01-01T23:59:59.000Z

    Plastic trash is an increasingly significant source of pollution in the world's oceans. In some remote ocean regions, it is aggregating by the ton. This thesis investigates plastic trash as an emerging marine contaminant, ...

  12. Cellular and molecular analysis of neuronal structure plasticity in the mammalian cortex

    E-Print Network [OSTI]

    Lee, Wei-Chung Allen

    2006-01-01T23:59:59.000Z

    Despite decades of evidence for functional plasticity in the adult brain, the role of structural plasticity in its manifestation remains unclear. cpg15 is an activity-regulated gene encoding a membrane-bound ligand that ...

  13. RIS-M-2586 ELASTIC-PLASTIC FRACTURE MECHANICS ANALYSIS OF A CT-SPECIMEN

    E-Print Network [OSTI]

    RIS?-M-2586 ELASTIC-PLASTIC FRACTURE MECHANICS ANALYSIS OF A CT-SPECIMEN - A TWO-DIMENSIONAL APPROACH Gunner C. Larsen Abstract. This report documents the results obtained from an elastic-plastic

  14. Geek-Up[10.15.2010]: Growing Nanoparticles, Developing Plastic...

    Energy Savers [EERE]

    Up10.15.2010: Growing Nanoparticles, Developing Plastic from Bacteria and Wireless Water Heaters Geek-Up10.15.2010: Growing Nanoparticles, Developing Plastic from Bacteria and...

  15. Plastic Surface Strain Mapping of Bent Sheets by Image Correlation

    E-Print Network [OSTI]

    Tong, Wei

    of 5XXX and 6XXX series automotive aluminum alloys is often more problematic (because of surface, the shape and surface plastic strain distribu- tions around a bent apex of a flat 2 mm thick automotive alu are widely used in making various electri- cal connectors and automotive components, respectively.2,3 Hemming

  16. INTRODUCTION The granular mechanics of plastics within a single-

    E-Print Network [OSTI]

    Thompson, Michael

    INTRODUCTION The granular mechanics of plastics within a single- screw extruder has, for the past are transported forward by the action of the extruder screw, assisted by the differ- ence in frictional forces and feed hopper of a single-screw extruder. The method considers each particle in a granular assem- bly

  17. Master Thesis: Simulation of plastic deformation in cemented carbide inserts

    E-Print Network [OSTI]

    Haviland, David

    Master Thesis: Simulation of plastic deformation in cemented carbide inserts Background Sandvik in cemented carbide, high-speed steel and other hard materials such as diamond, cubic boron nitride in cemented carbide inserts will be performed using the FEM software Ansys and AdvantEdge. The work

  18. Crystallization and doping of amorphous silicon on low temperature plastic

    DOE Patents [OSTI]

    Kaschmitter, James L. (Pleasanton, CA); Truher, Joel B. (Palo Alto, CA); Weiner, Kurt H. (Campbell, CA); Sigmon, Thomas W. (Beaverton, OR)

    1994-01-01T23:59:59.000Z

    A method or process of crystallizing and doping amorphous silicon (a-Si) on a low-temperature plastic substrate using a short pulsed high energy source in a selected environment, without heat propagation and build-up in the substrate. The pulsed energy processing of the a-Si in a selected environment, such as BF3 and PF5, will form a doped micro-crystalline or poly-crystalline silicon (pc-Si) region or junction point with improved mobilities, lifetimes and drift and diffusion lengths and with reduced resistivity. The advantage of this method or process is that it provides for high energy materials processing on low cost, low temperature, transparent plastic substrates. Using pulsed laser processing a high (>900.degree. C.), localized processing temperature can be achieved in thin films, with little accompanying temperature rise in the substrate, since substrate temperatures do not exceed 180.degree. C. for more than a few microseconds. This method enables use of plastics incapable of withstanding sustained processing temperatures (higher than 180.degree. C.) but which are much lower cost, have high tolerance to ultraviolet light, have high strength and good transparency, compared to higher temperature plastics such as polyimide.

  19. Plastic Hinging Behavior of Reinforced Concrete Bridge Columns

    E-Print Network [OSTI]

    Firat Alemdar, Zeynep

    2010-04-27T23:59:59.000Z

    of the seismic performance of four-span large-scale bridge systems at the University of Nevada Reno that details deformations in column hinging regions during response to strong shaking events. In order to evaluate the plastic hinging regions, a photogrammetric...

  20. Self-Assembling Circuits Plasticity in Self-Assembly: Templating

    E-Print Network [OSTI]

    Prentiss, Mara

    Self-Assembling Circuits Plasticity in Self-Assembly: Templating Generates Functionally Different on a combination of self-assembly and external guidance. We demonstrate the self-assembly of mm-sized components of a template--that is, by the geometry of the volume in which the self-assembly proceeds. The components carry

  1. Crystallization and doping of amorphous silicon on low temperature plastic

    DOE Patents [OSTI]

    Kaschmitter, J.L.; Truher, J.B.; Weiner, K.H.; Sigmon, T.W.

    1994-09-13T23:59:59.000Z

    A method or process of crystallizing and doping amorphous silicon (a-Si) on a low-temperature plastic substrate using a short pulsed high energy source in a selected environment, without heat propagation and build-up in the substrate is disclosed. The pulsed energy processing of the a-Si in a selected environment, such as BF3 and PF5, will form a doped micro-crystalline or poly-crystalline silicon (pc-Si) region or junction point with improved mobilities, lifetimes and drift and diffusion lengths and with reduced resistivity. The advantage of this method or process is that it provides for high energy materials processing on low cost, low temperature, transparent plastic substrates. Using pulsed laser processing a high (>900 C), localized processing temperature can be achieved in thin films, with little accompanying temperature rise in the substrate, since substrate temperatures do not exceed 180 C for more than a few microseconds. This method enables use of plastics incapable of withstanding sustained processing temperatures (higher than 180 C) but which are much lower cost, have high tolerance to ultraviolet light, have high strength and good transparency, compared to higher temperature plastics such as polyimide. 5 figs.

  2. Visual and multisensory processing and plasticity in the human brain

    E-Print Network [OSTI]

    Visual and multisensory processing and plasticity in the human brain Thesis submitted; " , ) ""( " , , . ) (,, . " ) " ( ' , , , . " , ) " ' .( . , , , . " ) "... ( . ' ," ," " . , , , . ,,,,,, ,,,, . " " NIH . An important part of the thesis is a result of collaborations. To Dr. Agnes Floel and Prof for a fruitful scientific collaboration and an exciting journey to the visual cortex of the blind

  3. 1 INTRODUCTION In Spain, Plasticized polyvinyl chloride (PVC-

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    1 INTRODUCTION In Spain, Plasticized polyvinyl chloride (PVC- P) geomembranes began being used in waterproof- ing of infrastructure in the seventies. Early usage of PVC-P geomembranes was not particularly for the PVC-P homogeneous geomem- branes used in roofing. Subsequently, other stan- dards were drafted

  4. ORIGINAL PAPER Phenotypic plasticity and climatic adaptation in an Atlantic

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    areas is pointless and indicate reduced effects of a changing climate towards Mediterranean conditions. is found in the Iberian Pen- insula under Mediterranean and Atlantic conditions. Both climates encounter . Environmental stability. Phenotypic plasticity. Climate change . Pinus pinaster #12;Atlantic areas will, thus

  5. RESEARCH ARTICLE Sustained effects for training of smooth pursuit plasticity

    E-Print Network [OSTI]

    Haslwanter, Thomas

    RESEARCH ARTICLE Sustained effects for training of smooth pursuit plasticity Karin Eibenberger modifications of the inputs, or by controlled training of sensory systems. While the effects of adaptation on eye movements elicited by the vestibulo-ocular reflex are well established, modifications

  6. A Research Needs Assessment for waste plastics recycling: Volume 2, Project report. Final report

    SciTech Connect (OSTI)

    NONE

    1994-12-01T23:59:59.000Z

    This second volume contains detailed information on a number of specific topics relevant to the recovery/recycling of plastics.

  7. Technical specifications for mechanical recycling of agricultural plastic waste

    SciTech Connect (OSTI)

    Briassoulis, D., E-mail: briassou@aua.gr; Hiskakis, M.; Babou, E.

    2013-06-15T23:59:59.000Z

    Highlights: Technical specifications for agricultural plastic wastes (APWs) recycling proposed. Specifications are the base for best economical and environmental APW valorisation. Analysis of APW reveals inherent characteristics and constraints of APW streams. Thorough survey on mechanical recycling processes and industry as it applies to APW. Specifications for APW recycling tested, adjusted and verified through pilot trials. - Abstract: Technical specifications appropriate for the recycling of agricultural plastic wastes (APWs), widely accepted by the recycling industry were developed. The specifications establish quality standards to be met by the agricultural plastics producers, users and the agricultural plastic waste management chain. They constitute the base for the best economical and environmental valorisation of the APW. The analysis of the APW streams conducted across Europe in the framework of the European project LabelAgriWaste revealed the inherent characteristics of the APW streams and the inherent constraints (technical or economical) of the APW. The APW stream properties related to its recycling potential and measured during pilot trials are presented and a subsequent universally accepted simplified and expanded list of APW recycling technical specifications is proposed and justified. The list includes two sets of specifications, applied to two different quality categories of recyclable APW: one for pellet production process (Quality I) and another one for plastic profile production process (Quality II). Parameters that are taken into consideration in the specifications include the APW physical characteristics, contamination, composition and degradation. The proposed specifications are focused on polyethylene based APW that represents the vast majority of the APW stream. However, the specifications can be adjusted to cover also APW of different materials (e.g. PP or PVC) that are found in very small quantities in protected cultivations in Europe. The adoption of the proposed specifications could transform this waste stream into a labelled commodity traded freely in the market and will constitute the base for the best economical and environmental valorisation of the APW.

  8. Wood plastic composites based on microfibrillar blends of high density polyethylene/poly(ethylene terephthalate)

    E-Print Network [OSTI]

    Wood plastic composites based on microfibrillar blends of high density polyethylene January 2010 Keywords: Wood plastic composites Poly(ethylene terephthalate) Polyethylene Extrusion a b into wood plastic composites through a two-step reactive extrusion technology. Wood flour was added into pre

  9. Thermo-elasto-plastic finite element analysis of quasi-state processes in Eulerian reference

    E-Print Network [OSTI]

    Michaleris, Panagiotis

    Thermo-elasto-plastic finite element analysis of quasi-state processes in Eulerian reference frames ­ Incremental scheme ­ Fine mesh along entire heat source path ­ Lengthy computer runs · Elasto-Plasticity at times ti and ti-1, respectively. Penn State University 5 #12;Elasto-Plasticity Equilibrium: r(r, t) + b

  10. Improved Bounds on the Effective Yield Surface of Inhomogeneous Rigid/Plastic Materials

    E-Print Network [OSTI]

    Olson, Tamara

    Improved Bounds on the Effective Yield Surface of Inhomogeneous Rigid/Plastic Materials Tamara January 1993 Abstract The yield surface of a mixture of rigid/perfectly­plastic materials is examined plasticity under suffi­ ciently large stress. The set of stresses at which the deformation changes from

  11. he edge of a torn plastic sheet forms a complex three-dimensional fractal

    E-Print Network [OSTI]

    Texas at Austin. University of

    T he edge of a torn plastic sheet forms a complex three-dimensional fractal shape. We have found to the generation of characteristic wavy shapes. We used rectangular plastic sheets pulled from the sides (in the y produce an irreversible plastic deforma- tion of the sheet and, as they are relieved, the deformed sheet

  12. Weathering Effects on Mechanical Properties of Recycled HDPE Based Plastic Lumber

    E-Print Network [OSTI]

    Weathering Effects on Mechanical Properties of Recycled HDPE Based Plastic Lumber Jennifer K. Lynch recycled plastic lumber (RPL) decking was exposed to the environment for eleven years. The weathering in the construction of the deck were a commingled recycled plastic material referred to as curbside tailings, NJCT

  13. FINITE-ELEMENT FORMULATIONS FOR PROBLEMS OF LARGE ELASTIC-PLASTIC DEFORMATION

    E-Print Network [OSTI]

    FINITE-ELEMENT FORMULATIONS FOR PROBLEMS OF LARGE ELASTIC-PLASTIC DEFORMATION R. M. MCM~EKING and J elastic-plastic flow.The method is based on Hill's variational principle for incremental deformations in a manner which allows any conventions finite element program, for "small strain" elastic-plastic analysis

  14. PLASTIC VERSUS ELASTIC DEFORMATION EFFECTS ON MAGNETIC BARKHAUSEN NOISE IN STEEL

    E-Print Network [OSTI]

    Clapham, Lynann

    PLASTIC VERSUS ELASTIC DEFORMATION EFFECTS ON MAGNETIC BARKHAUSEN NOISE IN STEEL C.-G. STEFANITA, D) AbstractÐA study was performed to dierentiate the eects of elastic and plastic deformation on magnetic samples subjected to varying degrees of uniaxial elastic and plastic deformation up to H40% strain

  15. Local Flaps: A Real-Time Finite Element Based Solution to the Plastic Surgery

    E-Print Network [OSTI]

    Liblit, Ben

    Local Flaps: A Real-Time Finite Element Based Solution to the Plastic Surgery Defect Puzzle fundamental challenges in plastic surgery is the alter- ation of the geometry and topology of the skin for the patient after the procedure is completed. The plastic surgeon must look at the defect created

  16. RATE SENSITIVITY OF PLASTIC FLOW AND IMPLICATIONS FOR YIELD-SURFACE VERTICES

    E-Print Network [OSTI]

    RATE SENSITIVITY OF PLASTIC FLOW AND IMPLICATIONS FOR YIELD-SURFACE VERTICES Jwo PAN Stress; in recked form 29 Norember 1982) &tract-When crystalline slip is considered as the micromechanism of plastic sensitivity of plastic flow may be central to understanding the ambiguous conclusions from experimental

  17. Interfaces and Plastic Deformation in Materials: From Theory to Engineering (3 Credits)

    E-Print Network [OSTI]

    Chen, Zheng

    Interfaces and Plastic Deformation in Materials: From Theory to Engineering (3 Credits) Instructor in their plastic deformation. The interface structures and defects will be described at different scales. Interfaces and high temperature plasticity 11. Triple junctions: from free to constrained interfaces 12

  18. Structural Signature of Plastic Deformation in Metallic Glasses H. L. Peng,1,2

    E-Print Network [OSTI]

    Wang, Wei Hua

    Structural Signature of Plastic Deformation in Metallic Glasses H. L. Peng,1,2 M. Z. Li,2,* and W the degree of local fivefold symmetry (LFFS) as the structural indicator to predict plastic deformation of local structures and find that the plastic events prefer to be initiated in regions with a lower degree

  19. Specular highlights of plastic surfaces and the Fresnel Coefficient Elli Angelopoulou*

    E-Print Network [OSTI]

    Angelopoulou, Elli

    Specular highlights of plastic surfaces and the Fresnel Coefficient Elli Angelopoulou* and Sofya that the color of specularities for materials like plastics and ceramics can be approximated by the color by experiments performed on multispectral images of different colored plastic tiles. The refractive indices

  20. Researchers at the University of Alicante develop a method for recycling plastic with printed ink

    E-Print Network [OSTI]

    Escolano, Francisco

    Researchers at the University of Alicante develop a method for recycling plastic with printed ink printed ink on plastic films used in flexible packaging getting a product free from ink and suitable Group, allows the removal of printed ink through a physical-chemical treatment and retrieves the plastic

  1. THE ELASTIC-PLASTIC MECHANICS OF CRACK EXTENSION James R. Rice*

    E-Print Network [OSTI]

    THE ELASTIC-PLASTIC MECHANICS OF CRACK EXTENSION James R. Rice* ABSTRACT This paper briefly reviews progres~in the elastic plastic analysisof crack extension. Analytical results for plane strain and plane stress deformation fields are noted, and elastic-plastic fracture instability as well as transitional

  2. Covariance of phenotypically plastic traits induces an adaptive shift in host selection behaviour

    E-Print Network [OSTI]

    Dukas, Reuven

    Covariance of phenotypically plastic traits induces an adaptive shift in host selection behaviour efficiency. In the present study, we investigated covariance of two plastic traits--size at pupation and host; evolution 1. INTRODUCTION Phenotypic plasticity is defined as the ability of an organism to change its

  3. Bendable single crystal silicon thin film transistors formed by printing on plastic substrates

    E-Print Network [OSTI]

    Rogers, John A.

    Bendable single crystal silicon thin film transistors formed by printing on plastic substrates E on plastic substrates using an efficient dry transfer printing technique. In these devices, free standing-Si is then transferred, to a specific location and with a controlled orientation, onto a thin plastic sheet

  4. A CAVITATION TRACKING METHOD FOR ELASTIC-PLASTIC FLOW IN SOLIDS

    E-Print Network [OSTI]

    Shyue, Keh-Ming

    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

  5. Elastic-Plastic Models for Stable Crack Growtht *James R. Rice

    E-Print Network [OSTI]

    Elastic-Plastic Models for Stable Crack Growtht by *James R. Rice Mareh 1973 'PCAbh ~ ~ e c.\\. (n do not fully recover their strain upon unloading. The idealized non-linear elastic (left) and rigid-plastic,. there is ~ strain concentration created at the cut-ahead tip in the rigid-plastic material and the deformation field

  6. An accurate elasto-plastic frictional tangential forcedisplacement model for granular-flow

    E-Print Network [OSTI]

    Vu-Quoc, Loc

    An accurate elasto-plastic frictional tangential force­displacement model for granular for both elastic and plastic deformations together with interfacial friction occurring in collisions of spherical particles. This elasto-plastic frictional TFD model, with its force-driven version presented in [L

  7. 1 INTRODUCTION The plastic behavior of a certain powder or soil sam-

    E-Print Network [OSTI]

    Luding, Stefan

    1 INTRODUCTION The plastic behavior of a certain powder or soil sam- ple depends on the history in order to in- vestigate the elasto-plastic response of granular ma- terials. An alternative is obtained by the calculation of the interaction forces between parti- cles. This includes, e.g., plastic

  8. Parametric dislocation dynamics: A thermodynamics-based approach to investigations of mesoscopic plastic deformation

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    plastic deformation N. M. Ghoniem, S.-H. Tong, and L. Z. Sun Mechanical and Aerospace Engineering 3D interacting dislocation loops. The approach is appropriate for investigations of plastic defor formation of dislocation junctions. I. INTRODUCTION A fundamental description of plastic deformation is now

  9. PLASTIC BEHAVIOR OF PRESTRAINED METALS: MICROSTRUCTURAL ASPECTS. J.L. RAPHANEL and J.-H. SCHMITT

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    708 PLASTIC BEHAVIOR OF PRESTRAINED METALS: MICROSTRUCTURAL ASPECTS. J.L. RAPHANEL and J. 23 (1988) 708 AVRIL 1988, The plastic behavior of prestrained materials is often studied from, a plastic deformation induces microstructural evolutions. For a poly- crystalline single phase metal which

  10. PHYSICAL NATURE OF SHEAR BANDS FORMATION AND CONSTITUTIVE MODELLING FOR PLASTIC INSTABILITY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    697 PHYSICAL NATURE OF SHEAR BANDS FORMATION AND CONSTITUTIVE MODELLING FOR PLASTIC INSTABILITYtokrzyska 21,00-049 Warsaw,Poland Revue Phys. Appl. 23 (1988) 697 AVRIL 1988, Studies of plastic deformation dependent hardening property can be pivotal in the modelling for plastic deform- ation instability

  11. LeBonheur Children's Hospital/Aesthetic Surgery Plastic Surgery Rotation

    E-Print Network [OSTI]

    Cui, Yan

    LeBonheur Children's Hospital/Aesthetic Surgery Plastic Surgery Rotation PGY-7 (2nd year Resident) By the end of the Plastic Surgery Rotation at LeBonheur Children's Hospital and Aesthetic Surgery, the PGY-7 with the following conditions needing plastic surgery including but not limited to: · Mammary ptosis. mammary

  12. Mitigating Effects of Plastic Surgery: Fusing Face and Ocular Biometrics Raghavender Jillela and Arun Ross

    E-Print Network [OSTI]

    Ross, Arun Abraham

    Mitigating Effects of Plastic Surgery: Fusing Face and Ocular Biometrics Raghavender Jillela.Ross}@mail.wvu.edu Abstract The task of successfully matching face images obtained before and after plastic surgery is a challenging problem. The degree to which a face is altered depends on the type and number of plastic surgeries

  13. Plasticity-Mediated Competitive Learning Nicol N. Schraudolph Terrence J. Sejnowski

    E-Print Network [OSTI]

    Schraudolph, Nicol N.

    Plasticity-Mediated Competitive Learning Nicol N. Schraudolph Terrence J. Sejnowski nici representations are computa- tionally unattractive. By letting neural plasticity mediate the com- petitive.50 1.00 -4.00 -2.00 0.00 2.00 4.00 Figure 1: Activity f and plasticity f of a logistic node

  14. Development/Plasticity/Repair Dendritic Spine Dynamics Regulate the Long-Term Stability

    E-Print Network [OSTI]

    van Rossum, Mark

    Development/Plasticity/Repair Dendritic Spine Dynamics Regulate the Long-Term Stability of Synaptic Plasticity Cian O'Donnell,1,2 Matthew F. Nolan,3 and Mark C. W. van Rossum1 1Institute for Adaptive of Edinburgh, Edinburgh EH8 9XD, United Kingdom Long-term synaptic plasticity requires postsynaptic influx

  15. THE CHRONICLE OF HIGHER EDUCATION From the issue dated February 28, 2003 One Word: Plastics

    E-Print Network [OSTI]

    : Plastics A group of researchers defies wisdom with polymer blends By LILA GUTERMAN Last fall, researchers into place. The 56-foot-long, one-lane bridge held special meaning for them: It was the world's first all-plastic exclusively from recycled plastics. The bridge was only the researchers' latest success. Tens of thousands

  16. Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation

    E-Print Network [OSTI]

    Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation Robert C slip-weakening behavior is specified, and the off-fault material is described using an elastic-plastic poroelastoplastic materials with and without plastic dilation. During nondilatant undrained response near

  17. Developmental Plasticity in Linear Genetic Programming Nicholas Freitag McPhee

    E-Print Network [OSTI]

    Poli, Riccardo

    Developmental Plasticity in Linear Genetic Programming Nicholas Freitag McPhee Division of Science numerous types of plasticity, where they respond both developmentally and behaviorally to environ- mental selection to act on these otherwise "invis- ible" genes. In contrast to biological plasticity, the vast

  18. Phenotypic plasticity in opsin expression in a butterfly compound eye complements sex role

    E-Print Network [OSTI]

    Monteiro, Antnia

    Phenotypic plasticity in opsin expression in a butterfly compound eye complements sex role reversal-2148/12/232 #12;RESEARCH ARTICLE Open Access Phenotypic plasticity in opsin expression in a butterfly compound eye* Abstract Background: Animals often display phenotypic plasticity in morphologies and behaviors that result

  19. Sites of Plasticity in the Neural Circuit Mediating Tentacle Withdrawal in the Snail

    E-Print Network [OSTI]

    Chase, Ronald

    Sites of Plasticity in the Neural Circuit Mediating Tentacle Withdrawal in the Snail Helix aspersa with the dual-process theory of plasticity. Habituation, sensitization, or a combination of both were elicited by varying stimulation parameters and lesion condition. Analysis of response plasticity shows that the late

  20. Gurson's plasticity coupled to damage as a CAP model for concrete compaction in dynamics

    E-Print Network [OSTI]

    1 Gurson's plasticity coupled to damage as a CAP model for concrete compaction in dynamics Fabrice (compaction) but also the plastic strains in compression and cracking in tension. Recently, new dynamic is generally described by means of the plasticity theory where the spherical and the deviatoric responses

  1. Plasticity of BCC micro-pillars controlled by competition between dislocation multiplication and depletion

    E-Print Network [OSTI]

    Cai, Wei

    1 Plasticity of BCC micro-pillars controlled by competition between dislocation multiplication, plasticity is governed mainly by the kinetics of dislocation motion, not their elastic interactions. Keywords: plasticity, micro-pillars, dislocation dynamics, stress-strain relations Acta Materialia, in press (2013) #12

  2. Plasticity in the Rat Posterior Auditory Field Following Nucleus Basalis Stimulation

    E-Print Network [OSTI]

    Kilgard, Michael P.

    Plasticity in the Rat Posterior Auditory Field Following Nucleus Basalis Stimulation Amanda C. Plasticity in the rat posterior auditory field following nucleus basalis stimulation. J Neurophysiol 98: 253 have been shown to cause frequency-specific plasticity in both primary and secondary cortical areas

  3. Development/Plasticity/Repair A Refractory Period for Rejuvenating GABAergic Synaptic

    E-Print Network [OSTI]

    Gruner, Daniel S.

    Development/Plasticity/Repair A Refractory Period for Rejuvenating GABAergic Synaptic Transmission and Ocular Dominance Plasticity with Dark Exposure Shiyong Huang,1* Yu Gu,2* Elizabeth M. Quinlan,2 Dark exposure initiated in adulthood reactivates robust ocular dominance plasticity in the visual

  4. Phenotype Plasticity in Genetic Programming: A Comparison of Darwinian and Lamarckian

    E-Print Network [OSTI]

    Fernandez, Thomas

    Phenotype Plasticity in Genetic Programming: A Comparison of Darwinian and Lamarckian Inheritance of phenotype plasticity in Genetic Pro gramming (GP). This takes the form of a set of realvalued numerical that plastic GP has significant benefits including faster evolution and adaptation in changing environments

  5. Plasticity-induced structural anisotropy of silica glass C. L. Rountree1

    E-Print Network [OSTI]

    Boyer, Edmond

    Plasticity-induced structural anisotropy of silica glass C. L. Rountree1 , D. Vandembroucq2 , M anisotropic structure after extended shear plastic flow. This anisotropy which survives for an un- stressed tetrahedra microstructure remains mostly unaltered. PACS numbers: 62.20.F, 81.05.Kf Plasticity of amorphous

  6. Developmental plasticity of cutaneous water loss and lipid composition in stratum corneum of desert

    E-Print Network [OSTI]

    Williams, Jos. B.

    Developmental plasticity of cutaneous water loss and lipid composition in stratum corneum of desert and cerebrosides in the SC compared with mesic spar- rows. In this study, we investigated developmental plasticity modifications of the lipid composition of the SC. The expression of plasticity in CWL seems to be a response

  7. PHENOTYPIC PLASTICITY IN AGE AT FIRST REPRODUCTION OF FEMALE NORTHERN SEA OTTERS

    E-Print Network [OSTI]

    PHENOTYPIC PLASTICITY IN AGE AT FIRST REPRODUCTION OF FEMALE NORTHERN SEA OTTERS (ENHYDRA LUTRIS phenotypic plasticity. When populations are near carrying capacity (K) or when they are declining due) populations in Alaska provides an opportunity to examine phenotypic plasticity. Using premolar teeth

  8. Plasticity in Cu thin films: an experimental investigation of the effect of microstructure

    E-Print Network [OSTI]

    Plasticity in Cu thin films: an experimental investigation of the effect of microstructure A thesis Author Joost J. Vlassak Yong Xiang Plasticity in Cu thin films: an experimental investigation is constructed. The elastic-plastic behavior of Cu films is studied with emphasis on the effects

  9. Plasticity contributions to interface adhesion in thin-film interconnect structures

    E-Print Network [OSTI]

    Vainchtein, Anna

    Plasticity contributions to interface adhesion in thin-film interconnect structures Michael Lanea of plasticity in thin copper layers on the interface fracture resistance in thin-film interconnect structures yield properties together with a plastic flow model for the metal layers were used to predict

  10. PLASTICITY OF DAMAGED SOLIDS AND SHEAR BAND LOCALIZATION MARIA K.DUSZEK and PIOTR PERZYNA

    E-Print Network [OSTI]

    Boyer, Edmond

    694 PLASTICITY OF DAMAGED SOLIDS AND SHEAR BAND LOCALIZATION MARIA K.DUSZEK and PIOTR PERZYNA of shear band localization conditions for finite elastic-plastic rate independent deformations of damaged for elastic-plastic solids when iso- tropic and kinematic hardening effects and micro-damage process are taken

  11. Phenotypic Plasticity of Leaf Shape along a Temperature Gradient in Acer rubrum

    E-Print Network [OSTI]

    Royer, Dana

    Phenotypic Plasticity of Leaf Shape along a Temperature Gradient in Acer rubrum Dana L. Royer1 plasticity and genetic determination can be important for understanding how plants respond to environmental change. However, little is known about the plastic response of leaf teeth and leaf dissection

  12. Plasticity of intermediate mechanics students' coordinate system choice Eleanor C. Sayre

    E-Print Network [OSTI]

    Zollman, Dean

    Plasticity of intermediate mechanics students' coordinate system choice Eleanor C. Sayre Department from solid. To describe our work more precisely, we define a scale of plasticity and several heuristics for defining resources and their plasticity. DOI: 10.1103/PhysRevSTPER.4.020105 PACS number s : 01.30.lb, 01

  13. Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals

    E-Print Network [OSTI]

    Suresh, Subra

    Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals Ting-controlling mechanisms of plastic flow. We attribute the relatively high ductility of nano- twinned copper to the hardening of twin boundaries as they gradually lose coherency during plastic deformation. These find- ings

  14. Development/Plasticity/Repair Simultaneous NMDA-Dependent Long-Term Potentiation of

    E-Print Network [OSTI]

    Segal, Menahem

    Development/Plasticity/Repair Simultaneous NMDA-Dependent Long-Term Potentiation of EPSCs and Long activity-dependent long-term plasticity of neuronal networks is the interplay between excitatory, whereas a nitric oxide synthase inhibitor was ineffec- tive. Finally, network-induced plasticity

  15. Plasticity of metal wires in torsion: Molecular dynamics and dislocation dynamics simulations

    E-Print Network [OSTI]

    Cai, Wei

    Plasticity of metal wires in torsion: Molecular dynamics and dislocation dynamics simulations t The orientation dependent plasticity in metal nanowires is investigated using molecular dynamics and dislocation wires controls the mechanisms of plastic deformation. For wires oriented along /1 1 0S, dislocations

  16. III.C. 2. Plastics and Competing Materials by 1985: A Delphi Forecasting Study

    E-Print Network [OSTI]

    Bieber, Michael

    189 III.C. 2. Plastics and Competing Materials by 1985: A Delphi Forecasting Study SELWYN ENZER The application of Delphi to the identification and assessment of possible developments in plastics and competing. The ability to tailor-make plastics for various applications, enhanced by growth in understanding of organic

  17. Baling Used Agricultural Plastic Dr. Ron Goldy, MSUE, District Extension Educator

    E-Print Network [OSTI]

    Baling Used Agricultural Plastic Dr. Ron Goldy, MSUE, District Extension Educator Introduction: Use of agricultural plastics has been a subject many growers are reluctant to discuss. But one of the first questions the plastic is brought to the baler. Round hay balers have been used to bale greenhouse poly film so they were

  18. Methods for the continuous production of plastic scintillator materials

    DOE Patents [OSTI]

    Bross, Alan (Downers Grove, IL); Pla-Dalmau, Anna (Naperville, IL); Mellott, Kerry (Malta, IL)

    1999-10-19T23:59:59.000Z

    Methods for producing plastic scintillating material employing either two major steps (tumble-mix) or a single major step (inline-coloring or inline-doping). Using the two step method, the polymer pellets are mixed with silicone oil, and the mixture is then tumble mixed with the dopants necessary to yield the proper response from the scintillator material. The mixture is then placed in a compounder and compounded in an inert gas atmosphere. The resultant scintillator material is then extruded and pelletized or formed. When only a single step is employed, the polymer pellets and dopants are metered into an inline-coloring extruding system. The mixture is then processed under a inert gas atmosphere, usually argon or nitrogen, to form plastic scintillator material in the form of either scintillator pellets, for subsequent processing, or as material in the direct formation of the final scintillator shape or form.

  19. Symmetry group analysis of an ideal plastic flow

    E-Print Network [OSTI]

    Vincent Lamothe

    2011-02-11T23:59:59.000Z

    In this paper, we study the Lie point symmetry group of a system describing an ideal plastic plane flow in two dimensions in order to find analytical solutions. The infinitesimal generators that span the Lie algebra for this system are obtained. We completely classify the subalgebras of up to codimension two in conjugacy classes under the action of the symmetry group. Based on invariant forms, we use Ansatzes to compute symmetry reductions in such a way that the obtained solutions cover simultaneously many invariant and partially invariant solutions. We calculate solutions of the algebraic, trigonometric, inverse trigonometric and elliptic type. Some solutions depending on one or two arbitrary functions of one variable have also been found. In some cases, the shape of a potentially feasible extrusion die corresponding to the solution is deduced. These tools could be used to thin, curve, undulate or shape a ring in an ideal plastic material.

  20. Plastic anisotropy in a superplastic duplex stainless steel

    SciTech Connect (OSTI)

    Song, J.L.; Bate, P.S. [Univ. of Birmingham (United Kingdom)] [Univ. of Birmingham (United Kingdom)

    1997-07-01T23:59:59.000Z

    Measurements of the plastic anisotropy in uniaxial tension of the duplex stainless steel, SAF2304, have been made at room temperature and under conditions where the material was superplastic. There was significant plastic anisotropy in both types of deformation and there were some similarities between the low and high temperature variations with tensile axis orientation. Although it was possible to model the high temperature anisotropy using a grain boundary sliding model, the assumed distribution of sliding boundaries was considered to be unrealistic. This, together with aspects of microstructural and textural development, indicated that deformation was principally occurring by intragranular slip with a significant contribution caused by mechanical inhomogeneity in the two-phase material.

  1. Final LDRD report : advanced plastic scintillators for neutron detection.

    SciTech Connect (OSTI)

    Vance, Andrew L.; Mascarenhas, Nicholas; O'Bryan, Greg; Mrowka, Stanley

    2010-09-01T23:59:59.000Z

    This report summarizes the results of a one-year, feasibility-scale LDRD project that was conducted with the goal of developing new plastic scintillators capable of pulse shape discrimination (PSD) for neutron detection. Copolymers composed of matrix materials such as poly(methyl methacrylate) (PMMA) and blocks containing trans-stilbene (tSB) as the scintillator component were prepared and tested for gamma/neutron response. Block copolymer synthesis utilizing tSBMA proved unsuccessful so random copolymers containing up to 30% tSB were prepared. These copolymers were found to function as scintillators upon exposure to gamma radiation; however, they did not exhibit PSD when exposed to a neutron source. This project, while falling short of its ultimate goal, demonstrated the possible utility of single-component, undoped plastics as scintillators for applications that do not require PSD.

  2. Methods for the continuous production of plastic scintillator materials

    SciTech Connect (OSTI)

    Bross, A.; Pla-Dalmau, A.; Mellott, K.

    1999-10-19T23:59:59.000Z

    Methods are disclosed for producing plastic scintillating material employing either two major steps (tumble-mix) or a single major step (inline-coloring or inline-doping). Using the two step method, the polymer pellets are mixed with silicone oil, and the mixture is then tumble mixed with the dopants necessary to yield the proper response from the scintillator material. The mixture is then placed in a compounder and compounded in an inert gas atmosphere. The resultant scintillator material is then extruded and pelletized or formed. When only a single step is employed, the polymer pellets and dopants are metered into an inline-coloring extruding system. The mixture is then processed under a inert gas atmosphere, usually argon or nitrogen, to form plastic scintillator material in the form of either scintillator pellets, for subsequent processing, or as material in the direct formation of the final scintillator shape or form.

  3. Modeling Cortical Plasticity Based on Adapting Lateral Interaction

    E-Print Network [OSTI]

    A neural network model called LISSOM for the cooperative self-organization of afferent and lateral connections in cortical maps is applied to modeling cortical plasticity. After self-organization, the LISSOM maps are in a dynamic equilibrium with the input, and reorganize like the cortex in response to simulated cortical lesions and intracortical microstimulation. The model predicts that adapting lateral interactions are fundamental to cortical reorganization, and suggests techniques to hasten recovery following sensory cortical surgery.

  4. Pre-release plastic packaging of MEMS and IMEMS devices

    DOE Patents [OSTI]

    Peterson, Kenneth A. (Albuquerque, NM); Conley, William R. (Tijeras, NM)

    2002-01-01T23:59:59.000Z

    A method is disclosed for pre-release plastic packaging of MEMS and IMEMS devices. The method can include encapsulating the MEMS device in a transfer molded plastic package. Next, a perforation can be made in the package to provide access to the MEMS elements. The non-ablative material removal process can include wet etching, dry etching, mechanical machining, water jet cutting, and ultrasonic machining, or any combination thereof. Finally, the MEMS elements can be released by using either a wet etching or dry plasma etching process. The MEMS elements can be protected with a parylene protective coating. After releasing the MEMS elements, an anti-stiction coating can be applied. The perforating step can be applied to both sides of the device or package. A cover lid can be attached to the face of the package after releasing any MEMS elements. The cover lid can include a window for providing optical access. The method can be applied to any plastic packaged microelectronic device that requires access to the environment, including chemical, pressure, or temperature-sensitive microsensors; CCD chips, photocells, laser diodes, VCSEL's, and UV-EPROMS. The present method places the high-risk packaging steps ahead of the release of the fragile portions of the device. It also provides protection for the die in shipment between the molding house and the house that will release the MEMS elements and subsequently treat the surfaces.

  5. Elastic-Plastic-Brittle Transitions and Avalanches in Disordered Media Sohan Kale and Martin Ostoja-Starzewski*

    E-Print Network [OSTI]

    Ostoja-Starzewski, Martin

    Elastic-Plastic-Brittle Transitions and Avalanches in Disordered Media Sohan Kale and Martin Ostoja to simulate elastic-plastic-brittle transitions in a disordered medium is presented. The model is based, and the fracture surfaces. The model demonstrates a plastic strain avalanche behavior for perfectly plastic as well

  6. Company City State Contact Info 21st Century Plastics Corporation Potterville MI www.21stcpc.com

    E-Print Network [OSTI]

    McGaughey, Alan

    Company City State Contact Info 21st Century Plastics Corporation Potterville MI www.21stcpc.com A. Schulman, Inc. Akron OH www.aschulman.com A.M.A. Plastics Riverside CA www.accordindustries.com Airlite Plastics Co. Omaha NE www.airliteplastics.com Alco Plastics, Inc. Romeo MI www

  7. Comparison of isotropic elasto-plastic models for the plastic metric tensor $C_p=F_p^T\\, F_p$

    E-Print Network [OSTI]

    Patrizio Neff; Ionel-Dumitrel Ghiba

    2014-10-08T23:59:59.000Z

    We discuss in detail existing isotropic elasto-plastic models based on 6-dimensional flow rules for the positive definite plastic metric tensor $C_p=F_p^T\\, F_p$ and highlight their properties and interconnections. We show that seemingly different models are equivalent in the isotropic case.

  8. Recovery and separation of high-value plastics from discarded household appliances

    SciTech Connect (OSTI)

    Karvelas, D.E.; Jody, B.J.; Poykala, J.A. Jr.; Daniels, E.J. [Argonne National Lab., IL (United States). Energy Systems Div.; Arman, B. [Argonne National Lab., IL (United States). Energy Systems Div.]|[Praxair, Inc., Tarrytown, NY (United States)

    1996-03-01T23:59:59.000Z

    Argonne National Laboratory is conducting research to develop a cost- effective and environmentally acceptable process for the separation of high-value plastics from discarded household appliances. The process under development has separated individual high purity (greater than 99.5%) acrylonitrile-butadiene-styrene (ABS) and high- impact polystyrene (HIPS) from commingled plastics generated by appliance-shredding and metal-recovery operations. The process consists of size-reduction steps for the commingled plastics, followed by a series of gravity-separation techniques to separate plastic materials of different densities. Individual plastics of similar densities, such as ABS and HIPS, are further separated by using a chemical solution. By controlling the surface tension, the density, and the temperature of the chemical solution we are able to selectively float/separate plastics that have different surface energies. This separation technique has proven to be highly effective in recovering high-purity plastics materials from discarded household appliances. A conceptual design of a continuous process to recover high-value plastics from discarded appliances is also discussed. In addition to plastics separation research, Argonne National Laboratory is conducting research to develop cost-effective techniques for improving the mechanical properties of plastics recovered from appliances.

  9. Visualization of stacking faults in fcc crystals in plastic deformations

    E-Print Network [OSTI]

    Takeshi Kawasaki; Akira Onuki

    2011-11-27T23:59:59.000Z

    Using molecular dynamics simulation, we investigate the dynamics of stacking faults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixture composed of 4096 particles in three dimensions. We visualize stacking faults using a disorder variable $D_j(t)$ for each particle $j$ constructed from local bond order parameters based on spherical harmonics (Steinhardt order parameters). Also introducing a method of bond breakage, we examine how stacking faults are formed and removed by collective particle motions. These processes are relevant in plasticity of fcc crystals.

  10. A Novel Thermal Position Sensor Integrated On A Plastic Substrate

    E-Print Network [OSTI]

    A. Petropoulos; G. Kaltsas; D. Goustouridis; A. G. Nassiopoulou

    2008-01-07T23:59:59.000Z

    A thermal position sensor was fabricated and evaluated. The device consists of an array of temperature sensing elements, fabricated entirely on a plastic substrate. A novel fabrication technology was implemented which allows direct integration with read out electronics and communication to the macro-world without the use of wire bonding. The fabricated sensing elements are temperature sensitive Pt resistors with an average TCR of 0.0024/C. The device realizes the detection of the position and the motion of a heating source by monitoring the resistance variation of the thermistor array. The application field of such a cost-effective position sensor is considered quite extensive.

  11. Symmetry groups of non-stationary planar ideal plasticity

    E-Print Network [OSTI]

    Vincent Lamothe

    2014-09-30T23:59:59.000Z

    This paper is a study of the Lie groups of point symmetries admitted by a system describing a non-stationary planar flow of an ideal plastic material. For several types of forces involved in the system, the infinitesimal generators which generate the Lie algebra of symmetries have been obtained. In the case of a monogenic force, the classification of one- and two- dimensional subalgebras into conjugacy classes under the action of the group of automorphisms has been accomplished. The method of symmetry reduction is applied for certain subalgebra classes in order to obtain invariant solutions.

  12. Plastic Bags to Batteries: A Green Chemistry Solution | Argonne National

    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 Security Administration the1 - September 2006Photovoltaic Theory andVelocity Profile DuringLaboratory Plastic

  13. Plasticizers Derived from Vegetable Oils - Energy Innovation Portal

    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 Security Administration the1 - September 2006Photovoltaic Theory andVelocity Profile DuringLaboratory Plastic

  14. Plastics and Rubber Products (2010 MECS) | Department of Energy

    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 Security Administration the1 - September 2006Photovoltaic Theory andVelocity Profile DuringLaboratoryPlastics

  15. Supporting Information Scalable Air Cathode Microbial Fuel Cells Using Glass Fiber Separators, Plastic Mesh

    E-Print Network [OSTI]

    , Plastic Mesh Supporters, and Graphite Fiber Brush Anodes Xiaoyuan Zhang a , Shaoan Cheng b, c , Peng Liang (mW/m2 ) Reference Single brush Single Without plastic mesh or GF1 12 9.5±0.2 68±1 1160±21 This study Single brush Single Without plastic mesh, with GF1 12 11.8±2.1 74±4 1277±80 This study Single brush

  16. Arrangement for connecting a fiber-reinforced plastic pipe to a stainless steel flange

    DOE Patents [OSTI]

    Allais, Arnaud (D-30625 Hannover, DE); Hoffmann, Ernst (D-30855 Langenhagen, DE)

    2008-02-05T23:59:59.000Z

    Arrangement for connecting a fiber-reinforced plastic pipe (18) to a stainless steel flange (12, 16), in which the end of the fiber-reinforced plastic pipe (18) is accommodated in a ring-shaped groove (12a, 16a) in the flange (12, 16), the groove conforming to the dimensions of the fiber-reinforced plastic pipe (18), where the gap remaining between the end of the fiber-reinforced plastic pipe (18) and the ring-shaped groove (12a, 16a) is filled with a sealant (19).

  17. Thick adherent dielectric films on plastic substrates and method for depositing same

    DOE Patents [OSTI]

    Wickboldt, Paul (Walnut Creek, CA); Ellingboe, Albert R. (Fremont, CA); Theiss, Steven D. (Woodbury, MN); Smith, Patrick M. (San Ramon, CA)

    2002-01-01T23:59:59.000Z

    Thick adherent dielectric films deposited on plastic substrates for use as a thermal barrier layer to protect the plastic substrates from high temperatures which, for example, occur during laser annealing of layers subsequently deposited on the dielectric films. It is desirable that the barrier layer has properties including: a thickness of 1 .mu.m or greater, adheres to a plastic substrate, does not lift-off when cycled in temperature, has few or no cracks and does not crack when subjected to bending, resistant to lift-off when submersed in fluids, electrically insulating and preferably transparent. The thick barrier layer may be composed, for example, of a variety of dielectrics and certain metal oxides, and may be deposited on a variety of plastic substrates by various known deposition techniques. The key to the method of forming the thick barrier layer on the plastic substrate is maintaining the substrate cool during deposition of the barrier layer. Cooling of the substrate maybe accomplished by the use of a cooling chuck on which the plastic substrate is positioned, and by directing cooling gas, such as He, Ar and N.sub.2, between the plastic substrate and the cooling chucks. Thick adherent dielectric films up to about 5 .mu.m have been deposited on plastic substrates which include the above-referenced properties, and which enable the plastic substrates to withstand laser processing temperatures applied to materials deposited on the dielectric films.

  18. Intrinsic Plasticity in a Generative Model of V1 Cornelius Weber & Jochen Triesch

    E-Print Network [OSTI]

    Weber, Cornelius

    Intrinsic Plasticity in a Generative Model of V1 Cornelius Weber & Jochen Triesch Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe University Frankfurt. Email: c.weber

  19. E-Print Network 3.0 - aktau plastics plant Sample Search Results

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

    resource foraging... will be restricted to the role of plasticity in the capture of resources by the root ... Source: Novoplansky, Ariel - Department of Desert Ecology, Jacob...

  20. Composition of plastics from waste electrical and electronic equipment (WEEE) by direct sampling

    SciTech Connect (OSTI)

    Martinho, Graca [Departamento de Ciencias e Engenharia do Ambiente, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica (Portugal); Pires, Ana, E-mail: ana.lourenco.pires@gmail.com [Departamento de Ciencias e Engenharia do Ambiente, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica (Portugal); Saraiva, Luanha; Ribeiro, Rita [Departamento de Ciencias e Engenharia do Ambiente, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica (Portugal)

    2012-06-15T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer The article shows WEEE plastics characterization from a recycling unit in Portugal. Black-Right-Pointing-Pointer The recycling unit has low machinery, with hand sorting of plastics elements. Black-Right-Pointing-Pointer Most common polymers are PS, ABS, PC/ABS, HIPS and PP. Black-Right-Pointing-Pointer Most plastics found have no identification of plastic type or flame retardants. Black-Right-Pointing-Pointer Ecodesign is still not practiced for EEE, with repercussions in end of life stage. - Abstract: This paper describes a direct analysis study carried out in a recycling unit for waste electrical and electronic equipment (WEEE) in Portugal to characterize the plastic constituents of WEEE. Approximately 3400 items, including cooling appliances, small WEEE, printers, copying equipment, central processing units, cathode ray tube (CRT) monitors and CRT televisions were characterized, with the analysis finding around 6000 kg of plastics with several polymer types. The most common polymers are polystyrene, acrylonitrile-butadiene-styrene, polycarbonate blends, high-impact polystyrene and polypropylene. Additives to darken color are common contaminants in these plastics when used in CRT televisions and small WEEE. These additives can make plastic identification difficult, along with missing polymer identification and flame retardant identification marks. These drawbacks contribute to the inefficiency of manual dismantling of WEEE, which is the typical recycling process in Portugal. The information found here can be used to set a baseline for the plastics recycling industry and provide information for ecodesign in electrical and electronic equipment production.

  1. Coupled hydro-mechanical processes in crytalline rock and in induratedand plastic clays: A comparative discussion

    E-Print Network [OSTI]

    Tsang, Chin-Fu; Blumling, Peter; Bernier, Frederic

    2008-01-01T23:59:59.000Z

    Term HM Measurements around HADES URF, Proceedings of EUROCKThe extension of the HADES Underground Research facility atin a plastic clay formation: The HADES underground research

  2. Dislocations and Plasticity in bcc Transition Metals at High Pressure

    SciTech Connect (OSTI)

    Yang, L H; Tang, M; Moriarty, J A

    2009-01-23T23:59:59.000Z

    Using first-principles electronic structure calculations, quantum-based atomistic simulations and atomistically informed dislocation dynamics (DD) simulations, we have studied individual dislocation behavior and the multiscale modeling of single-crystal plasticity in the prototype bcc transition metals Ta, Mo and V under both ambient and high pressure conditions. The primary focus in this work is on the pressure-dependent structure, mobility and interaction of a/2<111> screw dislocations, which dominate the plastic deformation properties of these materials. At the electronic scale, first-principles calculations of elasticity, ideal strength and generalized stacking fault energy surfaces have been used to validate quantum-based multi-ion interatomic potentials. At the atomistic scale, these potentials have been used in flexible Green's function boundary condition simulations to study the core structure, Peierls stress {tau}{sub P}, thermally activated kink-pair formation and mobility below {tau}{sub P}, and phonon-drag mobility above {tau}{sub P}. These results have then been distilled into analytic velocity laws and used directly in predictive microscale DD simulations of flow stress and resolved yield stress over wide ranges of pressure, temperature and strain rate.

  3. Elasto-plastic response of reversibly crosslinked biopolymer bundles

    E-Print Network [OSTI]

    Poulomi Sadhukhan; Ole Schuman; Claus Heussinger

    2014-05-19T23:59:59.000Z

    We study the response of F-actin bundles to driving forces through a simple analytical model. We consider two filaments connected by reversibly bound crosslinks and driven by an external force. Two failure modes under load can be defined. \\textit{Brittle failure} is observed when crosslinks suddenly and collectively unbind, leading to catastrophic loss of bundle integrity. During \\textit{ductile failure}, on the other hand, bundle integrity is maintained, however at the cost of crosslink reorganization and defect formation. We present phase diagrams for the onset of failure, highlighting the importance of the crosslink stiffness for these processes. Crossing the phase boundaries, force-deflection curves display (frequency-dependent) hysteresis loops, reflecting the first-order character of the failure processes. We evidence how the introduction of defects can lead to complex elasto-plastic relaxation processes, once the force is switched off. Depending on, both, the time-scale for defect motion as well as the crosslink stiffness, bundles can remain in a quasi-permanent plastically deformed state for a very long time.

  4. Natural gas transport by plastic pipes. (Latest citations from the EI Compendex*plus database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1994-05-01T23:59:59.000Z

    The bibliography contains citations concerning the use of plastic piping to transport natural gas or liquid propane gas. The interaction between gas odorants and plastic pipe, the effects of aging on plastic pipe used to transport gas, and pipe failure analyses are examined. Bending, joining, and repair methods are discussed. Composite reinforced plastic pipes and plastic coated pipes are considered. Polyethylene and epoxy composites are among the materials discussed. Gas main upgrading projects that replaced old pipes with plastic ones are briefly cited. (Contains a minimum of 89 citations and includes a subject term index and title list.)

  5. S M Stoller Star Center-B100 Monthly/Effluent; Largo, FL

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I1/06 Technical Report for

  6. S M Stoller Star Center-B100 Monthly/Effluent; Largo, FL

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I1/06 Technical Report

  7. S M Stoller Star Center-B100 Monthly/Effluent; Largo, FL

    Office of Legacy Management (LM)

    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 May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE&.17- I1/06 Technical

  8. Plastic and viscous dissipations in foams: cross-over from low to high shear rates

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    by the thin dotted arrow. The geometry of the bubble walls at three points of the curve is shown as insets display elastic, plastic and viscous behaviours. Bubble deformation is elastic until the material plastically yields and bubbles swap neighbours, then bubbles relax dissipatively towards a new energy minimum

  9. Modeling cyclic ratcheting based fatigue life of HSLA steels using crystal plasticity FEM simulations and experiments

    E-Print Network [OSTI]

    Ghosh, Somnath

    Modeling cyclic ratcheting based fatigue life of HSLA steels using crystal plasticity FEM This paper develops a plastic ratcheting based fatigue failure model for HSLA steels from a combination. It predicts the nucleation of major cracks in the microstruc- ture in ratcheting. Subsequently, the total life

  10. A plane stress anisotropic plastic flow theory for orthotropic sheet metals

    E-Print Network [OSTI]

    Tong, Wei

    such as automotive aluminum sheets. As textured sheet metals produced by hot and cold rolling exhibit significant for describing the anisotropic plastic flow of ortho- tropic polycrystalline aluminum sheet metals under plane are applied successfully to describe the anisotropic plastic flow behavior of 10 commercial aluminum alloy

  11. Geographic variation in phenotypic plasticity in response to dissolved oxygen in an African cichlid fish

    E-Print Network [OSTI]

    Nuismer, Scott L.

    Geographic variation in phenotypic plasticity in response to dissolved oxygen in an African cichlid variation in a population over a number of generations to result in a population that is locally adapted and plastic variation in gill and brain size among swamp (low oxygen; hypoxic) and river (normal oxygen

  12. Opportunities and Barriers in the Implementation of Energy Efficiency Measures in Plastic Manufacturing

    E-Print Network [OSTI]

    Kanunho, A; Yong, J. C.

    2012-01-01T23:59:59.000Z

    The plastic industry in the U.S. employs approximately 9% [1] of the manufacturing work force and consumes approximately 6% [1] of the total energy used by the U.S. industries. According to the Department of Energy (DOE), manufacturers of plastic...

  13. Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1

    E-Print Network [OSTI]

    Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1 C. Stoeckl,1 V. N. Goncharov,1 J-gas-filled plastic shells are imploded by direct irradiation from the OMEGA laser T. R. Boehly et al., Opt. Commun

  14. Gone are the days of awkwardly angling your tall plastic water

    E-Print Network [OSTI]

    Baskaran, Mark

    Gone are the days of awkwardly angling your tall plastic water bottle under the rushing arc of the number of plastic water bottles saved from landfills.As of Oct.31, the station in the RFC alone has with Facilities Planning and Management, retrofitted six standard drinking fountains with new EZH2O water bottle

  15. Incineration of Residue from Paint Stripping Operations Using Plastic Media Blasting

    E-Print Network [OSTI]

    Helt, J. E.; Mallya, N.

    i INCINERATION OF RESIDUE FROH PAINT STRIPPING OPERATIONS USING PLASTIC MEDIA BLASTING J. E. HELT N. MALLYA Group Leader Chemist Chemical Technology Division Chemical Technology Division Argonne National Laboratory Argonne National... Laboratory Argonne, Illinois Argonne, Illinois ABSTRACT A preliminary investigation has been performed on the environmental consequences of incinerating plastic-media-blasting (PHB) wastes from paint removal operations. PHB is similar to sandblasting...

  16. Fractal Shear Bands at Elastic-Plastic Transitions in Random Mohr-Coulomb Materials

    E-Print Network [OSTI]

    Ostoja-Starzewski, Martin

    Fractal Shear Bands at Elastic-Plastic Transitions in Random Mohr-Coulomb Materials J. Li, A.M.ASCE1 ; and M. Ostoja-Starzewski, M.ASCE2 Abstract: This paper studies fractal patterns forming of plastic grains (i.e., a shear-band system) is always a monotonically growing fractal under increasing

  17. Denoual, C., and Diani, J.M., 2002, ``Cavitation in Compressible Visco-Plastic Materials",

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Denoual, C., and Diani, J.M., 2002, ``Cavitation in Compressible Visco-Plastic Materials", Shock-498. CAVITATION IN COMPRESSIBLE VISCO­PLASTIC MATERIALS C. Denoual and J. M. Diani D´epartement de Physique Th materials in hydrostatic tension is a cavitation instabil- ity ¡£¢¥¤ , i.e., nucleation and coalescence

  18. On the role of inhibition in cortical plasticity: a computational study \\Lambda Lubica Benuskov'a

    E-Print Network [OSTI]

    Benuskova, Luba

    , experience, cortical plasticity, dynamic synaptic modification threshold, inhibition, non­specificity 1On the role of inhibition in cortical plasticity: a computational study \\Lambda Lubica BeŸnuŸskov'a Department of Computer Science and Engineering Slovak Technical University, 81219 Bratislava, Slovakia

  19. SERVICEABILITY OF CONCRETE BEAMS PRESTRESSED BY CARBON FffiRE REINFORCED PLASTIC .RODS

    E-Print Network [OSTI]

    SERVICEABILITY OF CONCRETE BEAMS PRESTRESSED BY CARBON FffiRE REINFORCED PLASTIC .RODS A of Manitoba to study the serviceability of concrete beams prestressed by carbon fibre reinforced plastic (CFRP) rods. The experimental program consisted of eight concrete beams prestressed by CFRP rods and two

  20. Limits of isotropic plastic deformation of Bangkok clay

    E-Print Network [OSTI]

    P. Evesque

    2005-07-08T23:59:59.000Z

    A model assuming incremental plastic isotropic response has been recently proposed to model the deformation of isotropic packing of grains, in the small-strain range. It is used here on over-consolidated remould clay, to interpret the small-strain range behaviour obtained in [1,2] on Bangkok clay. The data published in [1,2] at constant volume are also used here to measure the size of the domain of validity in the (q/(M'p), p/po) plane, where po is the over-consolidation isotropic pressure, p is the mean stress and q the deviatoric stress, q . So, it is shown that the model works also for clay. This enlarges the application domain of model [3,4] to soft clay with OCR larger than 1.2 to 1.5. Pacs # : 45.70.-n ; 62.20.Fe ; 83.80.Fg, 83.80.Hj

  1. Plasticity of a colloidal polycrystal under cyclic shear

    E-Print Network [OSTI]

    Elisa Tamborini; Luca Cipelletti; Laurence Ramos

    2014-08-27T23:59:59.000Z

    We use confocal microscopy and time-resolved light scattering to investigate plasticity in a col- loidal polycrystal, following the evolution of the network of grain boundaries as the sample is submitted to thousands of shear deformation cycles. The grain boundary motion is found to be ballistic, with a velocity distribution function exhibiting non-trivial power law tails. The shear- induced dynamics initially slow down, similarly to the aging of the spontaneous dynamics in glassy materials, but eventually reach a steady state. Surprisingly, the cross-over time between the ini- tial aging regime and the steady state decreases with increasing probed length scale, hinting at a hierarchical organization of the grain boundary dynamics.

  2. Study of a model for reference-free plasticity

    E-Print Network [OSTI]

    Stephan Luckhaus; Jens Wohlgemuth

    2014-08-06T23:59:59.000Z

    We investigate a Kac-type many particle model that allows a reference-free description of plastic deformation. In the framework of the model a solid body is described by a set of particle positions. A lattice is fitted to the particle configuration around each point on a mesoscopic scale. The lattice parameters are used as an argument of a non-linear elasticity energy functional. There are two main results in this paper. First, we prove an estimate for the difference between the fitted lattice parameters of points of low energy density that are sufficiently close to each other. Sequences of these points can be used for homotopy type arguments. In particular it is possible to identify dislocations as topological defects in this framework. Furthermore, we use the fitted lattice parameters as local Lagrangian coordinates and bound the energy from below with a functional of these coordinates.

  3. Accurate direct Eulerian simulation of dynamic elastic-plastic flow

    SciTech Connect (OSTI)

    Kamm, James R [Los Alamos National Laboratory; Walter, John W [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    The simulation of dynamic, large strain deformation is an important, difficult, and unsolved computational challenge. Existing Eulerian schemes for dynamic material response are plagued by unresolved issues. We present a new scheme for the first-order system of elasto-plasticity equations in the Eulerian frame. This system has an intrinsic constraint on the inverse deformation gradient. Standard Godunov schemes do not satisfy this constraint. The method of Flux Distributions (FD) was devised to discretely enforce such constraints for numerical schemes with cell-centered variables. We describe a Flux Distribution approach that enforces the inverse deformation gradient constraint. As this approach is new and novel, we do not yet have numerical results to validate our claims. This paper is the first installment of our program to develop this new method.

  4. Indentation size effect and the plastic compressibility of glass

    SciTech Connect (OSTI)

    Smedskjaer, Morten M., E-mail: mos@bio.aau.dk [Section of Chemistry, Aalborg University, 9000 Aalborg (Denmark)

    2014-06-23T23:59:59.000Z

    Oxide glasses exhibit significant densification under an applied isostatic pressure at the glass transition temperature. The glass compressibility is correlated with the chemical composition and atomic packing density, e.g., borate glasses with planar triangular BO{sub 3} units are more disposed for densification than silicate glasses with tetrahedral units. We here show that there is a direct relation between the plastic compressibility following hot isostatic compression and the extent of the indentation size effect (ISE), which is the decrease of hardness with indentation load exhibited by most materials. This could suggest that the ISE is correlated with indentation-induced shear bands, which should form in greater density when the glass network is more adaptable to volume changes through structural and topological rearrangements under an applied pressure.

  5. Terahertz inline wall thickness monitoring system for plastic pipe extrusion

    SciTech Connect (OSTI)

    Hauck, J., E-mail: j.hauck@skz.de, E-mail: d.stich@skz.de, E-mail: p.heidemeyer@skz.de, E-mail: m.bastian@skz.de, E-mail: t.hochrein@skz.de; Stich, D., E-mail: j.hauck@skz.de, E-mail: d.stich@skz.de, E-mail: p.heidemeyer@skz.de, E-mail: m.bastian@skz.de, E-mail: t.hochrein@skz.de; Heidemeyer, P., E-mail: j.hauck@skz.de, E-mail: d.stich@skz.de, E-mail: p.heidemeyer@skz.de, E-mail: m.bastian@skz.de, E-mail: t.hochrein@skz.de; Bastian, M., E-mail: j.hauck@skz.de, E-mail: d.stich@skz.de, E-mail: p.heidemeyer@skz.de, E-mail: m.bastian@skz.de, E-mail: t.hochrein@skz.de; Hochrein, T., E-mail: j.hauck@skz.de, E-mail: d.stich@skz.de, E-mail: p.heidemeyer@skz.de, E-mail: m.bastian@skz.de, E-mail: t.hochrein@skz.de [SKZ - German Plastics Center, Wuerzburg (Germany)

    2014-05-15T23:59:59.000Z

    Conventional and commercially available inline wall thickness monitoring systems for pipe extrusion are usually based on ultrasonic or x-ray technology. Disadvantages of ultrasonic systems are the usual need of water as a coupling media and the high damping in thick walled or foamed pipes. For x-ray systems special safety requirements have to be taken into account because of the ionizing radiation. The terahertz (THz) technology offers a novel approach to solve these problems. THz waves have many properties which are suitable for the non-destructive testing of plastics. The absorption of electrical isolators is typically very low and the radiation is non-ionizing in comparison to x-rays. Through the electromagnetic origin of the THz waves they can be used for contact free measurements. Foams show a much lower absorption in contrast to acoustic waves. The developed system uses THz pulses which are generated by stimulating photoconductive switches with femtosecond laser pulses. The time of flight of THz pulses can be determined with a resolution in the magnitude of several ten femtoseconds. Hence the thickness of an object like plastic pipes can be determined with a high accuracy by measuring the time delay between two reflections on materials interfaces e.g. at the pipe's inner and outer surface, similar to the ultrasonic technique. Knowing the refractive index of the sample the absolute layer thickness from the transit time difference can be calculated easily. This method in principle also allows the measurement of multilayer systems and the characterization of foamed pipes.

  6. Coal plasticity at high heating rates and temperatures. Final technical progress report

    SciTech Connect (OSTI)

    Gerjarusak, S.; Peters, W.A.; Howard, J.B.

    1995-05-01T23:59:59.000Z

    Plastic coals are important feedstocks in coke manufacture, coal liquefaction, gasification, and combustion. During these processes, the thermoplastic behavior of these coals is also important since it may contribute to desirable or undesirable characteristics. For example, during liquefaction, the plastic behavior is desired since it leads to liquid-liquid reactions which are faster than solid-liquid reactions. During gasification, the elastic behavior is undesired since it leads to caking and agglomeration of coal particles which result in bed bogging in fixed or fluidized bed gasifiers. The plastic behavior of different coals was studied using a fast-response plastometer. A modified plastometer was used to measure the torque required to turn at constant angular speed a cone-shaped disk embedded in a thin layer of coal. The coal particles were packed between two metal plates which are heated electrically. Heating rates, final temperatures, pressures, and durations of experiment ranged from 200--800 K/s, 700--1300 K, vacuum-50 atm helium, and 0--40 s, respectively. The apparent viscosity of the molten coal was calculated from the measured torque using the governing equation of the cone-and-plate viscometer. Using a concentrated suspension model, the molten coal`s apparent viscosity was related to the quantity of the liquid metaplast present during pyrolysis. Seven coals from Argonne National Laboratory Premium Coal Sample Bank were studied. Five bituminous coals, from high-volatile to low-volatile bituminous, were found to have very good plastic behavior. Coal type strongly affects the magnitude and duration of plasticity. Hvb coals were most plastic. Mvb and lvb coals, though the maximum plasticity and plastic period were less. Low rank coals such as subbituminous and lignite did not exhibit any plasticity in the present studies. Coal plasticity is moderately well correlated with simple indices of coal type such as the elemental C,O, and H contents.

  7. The need to design and construct roadways on highly plastic clays is common in central and eastern Texas, where expansive clays are prevalent. Roadways constructed on highly plastic clay subgrades may be damaged

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    The need to design and construct roadways on highly plastic clays is common in central and eastern Texas, where expansive clays are prevalent. Roadways constructed on highly plastic clay subgrades may the infiltration of water into highly plastic clays under an increased gravity field in a centrifuge. Project

  8. Press Association 19 minutes ago Weaving threads of atoms into star-shapes could produce lighter, stronger plastics, according to scientists.

    E-Print Network [OSTI]

    Leigh, David A.

    produce lighter, stronger plastics, according to scientists. Researchers at the University of Edinburgh's plastics and polymers, could allow them to exercise greater control when designing materials. Using

  9. NUCLEARENGINEERINGAND DESIGN17 (1971) 64.-75. NORTH-HOLLANDPUBLISHINGCOMPANY PROGRESS IN THREE-DIMENSIONAL ELASTIC-PLASTIC STRESS

    E-Print Network [OSTI]

    -DIMENSIONAL ELASTIC-PLASTIC STRESS ANALYSIS FOR FRACTURE MECHANICS * N. LEVY, P.V. MARCAL and J.R. RICE Division summarizesprogressin the development of finite element methods for three-dimensionalelastic- plastic stressanalysisin methods for three-dimensional elastic-plastic stress analysis in fracture mechanics, as a part

  10. Plastic deformation of bunsenite (NiO) at temperatures below 1 050 C F. Guiberteau (*), A. Donminguez-Rodriguez

    E-Print Network [OSTI]

    Boyer, Edmond

    87 Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C F. Guiberteau (*), A much smaller than the one previously published [3, 5]. The plastic anisotropy is compared to other processes of deformation of materials. In the past, we have studied the plasticity of nickel oxide at high

  11. PLASTIC FLOW AND STRUCTURAL MORPHOLOGY OF TWO PHASE MATERIALS BRETHEAU T., CALDEMAISON D., FEYLESSOUFI A., ZAOUI A.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    698 PLASTIC FLOW AND STRUCTURAL MORPHOLOGY OF TWO PHASE MATERIALS BRETHEAU T., CALDEMAISON D. 23 (1988) 698 AVRIL 1988,1 Up to now, the microheterogeneous material plastic modelling developped is the phase volume fraction which leads, at best, to upper and lower bounds for the overall plastic behaviour

  12. Plastic behavior of face-centered-cubic metals over a wide range Nguyen Q. Chinh a,*, Tamas Csanadi a

    E-Print Network [OSTI]

    Gubicza, Jenõ

    Plastic behavior of face-centered-cubic metals over a wide range of strain Nguyen Q. Chinh a Available online 16 June 2010 Abstract The plastic behavior of four pure face-centered-cubic (fcc) metals plastic deformation. It is shown that at high strains the saturation flow stress and the total dislocation

  13. FRACTALS IN THERMO-ELASTO-PLASTIC MATERIALS (to appear in JoMMS J. Mech. Mater. Struct.)

    E-Print Network [OSTI]

    Ostoja-Starzewski, Martin

    FRACTALS IN THERMO-ELASTO-PLASTIC MATERIALS (to appear in JoMMS ­ J. Mech. Mater. Struct.) J. LI AND M. OSTOJA-STARZEWSKI Fractal patterns are observed in computer simulations of elastic-plastic transitions in linear, locally isotropic thermoelastic-hardening plastic heterogeneous materials. The models

  14. Report No. PA 14 of 2008 Compliance to rules governing municipal solid, bio-medical and plastic

    E-Print Network [OSTI]

    Columbia University

    -medical and plastic waste Objective 5: Whether effective compliance to rules/laws regulating municipal solid waste, bio-medical waste and plastic waste was taking place in the state. The United Nations Conference of 2008 54 · The Recycled Plastics Manufacture and Usage Rules were notified in 1999 with an amendment

  15. Plastic flow of frictionless grains near the jamming transition Claus Heussinger Pinaki Chaudhuri Jean-Louis Barrat

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Plastic flow of frictionless grains near the jamming transition Claus Heussinger Pinaki Chaudhuri. This flow behavior is called "plastic flow" as the mate- rial will not revert to its original shape when strain localization in the simulations that are presented here. Plastic flow is observed in a large

  16. Plastic behavior of fcc metals over a wide range of strain: Macroscopic and microscopic descriptions and their relationship

    E-Print Network [OSTI]

    Gubicza, Jenõ

    Plastic behavior of fcc metals over a wide range of strain: Macroscopic and microscopic The room temperature macroscopic and microscopic plastic behavior of four face-centered cubic metals (Al dislocations during plastic flow. It is shown that forest dislocations develop primarily due to interaction

  17. Plastic deformation of a porous bcc metal containing nanometer sized C.J. Ruestes a,e,f,

    E-Print Network [OSTI]

    Meyers, Marc A.

    Plastic deformation of a porous bcc metal containing nanometer sized voids C.J. Ruestes a,e,f, , E and quantify the evolution of plasticity in a por- ous Ta single crystal containing randomly placed voids in the dislocation loops. The temperature excursion during plastic deformation was used to estimate the mobile

  18. TRANSFORMATION OF PHB AND PHBV GENES DRIVEN BY MAIZE UBIQUITIN PROMOTER INTO OIL PALM FOR THE PRODUCTION OF BIODEGRADABLE PLASTICS

    E-Print Network [OSTI]

    Sinskey, Anthony J.

    FOR THE PRODUCTION OF BIODEGRADABLE PLASTICS 77 Keywords: biodegradable plastics, oil palm, transgenic, biolistics PALM FOR THE PRODUCTION OF BIODEGRADABLE PLASTICS GHULAM KADIR AHMAD PARVEEZ*; BAHARIAH BOHARI*; NOR value products in their yield. One of the products in great demand is thermoplastics, or biodegradable

  19. J. Non-Newtonian Fluid Mech. 142 (2007) 135142 Cessation of annular Poiseuille flows of Bingham plastics

    E-Print Network [OSTI]

    Georgiou, Georgios

    2007-01-01T23:59:59.000Z

    plastics Maria Chatziminaa, Christos Xenophontosa, Georgios C. Georgioua,, Ioannis Argyropaidasb, Evan plastics for various values of the diameter ratio, using the regularized constitutive equation proposed, 1984]. © 2006 Elsevier B.V. All rights reserved. Keywords: Annular Poiseuille flow; Bingham plastic

  20. The role of plasticity in resource capture by plants J.P. GRIME* and J.M.L. MACKEY

    E-Print Network [OSTI]

    Novoplansky, Ariel

    The role of plasticity in resource capture by plants J.P. GRIME* and J.M.L. MACKEY Unit factors allow an ecologically important distinction to be made between morphological plasticity acclimation, defoliation, morphological plasticity, phylogeny, plant community structure, resource foraging

  1. Off-fault plasticity and earthquake rupture dynamics: 1. Dry materials or neglect of fluid pressure changes

    E-Print Network [OSTI]

    Off-fault plasticity and earthquake rupture dynamics: 1. Dry materials or neglect of fluid pressure an explicit dynamic finite element procedure. A Mohr-Coulomb type elastic-plastic description describes-fault plasticity during dynamic rupture. Those include the angle with the fault of the maximum compressive

  2. Creep and plasticity of glacier ice: a material science perspective Paul DUVAL, Maurine MONTAGNAT, Fanny GRENNERAT, Jerome WEISS,

    E-Print Network [OSTI]

    Weiss, Jrme

    Creep and plasticity of glacier ice: a material science perspective Paul DUVAL, Maurine MONTAGNAT the plasticity of ice have been made during the past 60 years with the development of studies of the flow experimental investigations clearly show that the plastic deformation of the ice single crystal and polycrystal

  3. Simultaneous combustion of waste plastics with coal for pulverized coal injection application

    SciTech Connect (OSTI)

    Sushil Gupta; Veena Sahajwalla; Jacob Wood [University of New South Wales, Sydney, NSW (Australia). Cooperative Research Centre for Coal in Sustainable Development, School of Materials Science and Engineering

    2006-12-15T23:59:59.000Z

    A bench-scale study was conducted to investigate the effect of simultaneous cofiring of waste plastic with coal on the combustion behavior of coals for PCI (pulverized coal injection) application in a blast furnace. Two Australian coals, premixed with low- and high-density polyethylene, were combusted in a drop tube furnace at 1473 K under a range of combustion conditions. In all the tested conditions, most of the coal blends including up to 30% plastic indicated similar or marginally higher combustion efficiency compared to those of the constituent coals even though plastics were not completely combusted. In a size range up to 600 {mu}m, the combustion efficiency of coal and polyethylene blends was found be independent of the particle size of plastic used. Both linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) are shown to display similar influence on the combustion efficiency of coal blends. The effect of plastic appeared to display greater improvement on the combustion efficiency of low volatile coal compared to that of a high volatile coal blend. The study further suggested that the effect of oxygen levels of the injected air in improving the combustion efficiency of a coal-plastic blend could be more effective under fuel rich conditions. The study demonstrates that waste plastic can be successfully coinjected with PCI without having any adverse effect on the combustion efficiency particularly under the tested conditions. 22 refs., 12 figs., 2 tabs.

  4. Structural-chemical modeling of transition of coals to the plastic state

    SciTech Connect (OSTI)

    A.M. Gyul'maliev; S.G. Gagarin [FGUP Institute for Fossil Fuels, Moscow (Russian Federation)

    2007-02-15T23:59:59.000Z

    The structural-chemical simulation of the formation of plastic state during the thermal treatment (pyrolysis, coking) of coals is based on allowance for intermolecular interactions in the organic matter. The feasibility of transition of coals to the plastic state is determined by the ratio between the onset plastic state (softening) and runaway degradation temperatures, values that depend on the petrographic composition and the degree of metamorphism of coals and the distribution of structural and chemical characteristics of organic matter. 33 refs., 8 figs., 2 tabs.

  5. From depinning transition to plastic yielding of amorphous media: A soft modes perspective

    E-Print Network [OSTI]

    Botond Tyukodi; Sylvain Patinet; Stphane Roux; Damien Vandembroucq

    2015-02-26T23:59:59.000Z

    A mesoscopic model of amorphous plasticity is discussed in the wider context of depinning models. After embedding in a d + 1 dimensional space, where the accumulated plastic strain lives along the additional dimension, the gradual plastic deformation of amorphous media can be regarded as the motion of an elastic manifold in a disordered landscape. While the associated depinning transition leads to scaling properties, the quadrupolar Eshelby interactions at play induce specific additional features like shear-banding and weak ergodicity breakdown. The latters are shown to be controlled by the existence of soft modes of the quadrupolar interaction, the consequence of which is discussed in the context of depinning.

  6. Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid

    DOE Patents [OSTI]

    Evans, R.J.; Chum, H.L.

    1995-11-07T23:59:59.000Z

    A process is described for pyrolyzing plastic waste feed streams containing polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene to recover polystyrene, HCl and terephthalic acid comprising: heating the plastic waste feed stream to a first temperature; adding an acid or base catalyst on an oxide or carbonate support; heating the plastic waste feed stream to pyrolyze polyethylene terephthalate and polyvinyl chloride; separating terephthalic acid or HCl; heating to a second temperature to pyrolyze polystyrene; separating styrene; heating the waste feed stream to a third temperature to pyrolyze polyethylene; and separating hydrocarbons. 83 figs.

  7. Sequential pyrolysis of plastic to recover polystyrene HCL and terephthalic acid

    DOE Patents [OSTI]

    Evans, Robert J. (Lakewood, CO); Chum, Helena L. (Arvada, CO)

    1995-01-01T23:59:59.000Z

    A process of pyrolyzing plastic waste feed streams containing polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene to recover polystyrene HCl and terephthalic acid comprising: heating the plastic waste feed stream to a first temperature; adding an acid or base catalyst on an oxide or carbonate support; heating the plastic waste feed stream to pyrolyze polyethylene terephthalate and polyvinyl chloride; separating terephthalic acid or HCl; heating to a second temperature to pyrolyze polystyrene; separating styrene; heating the waste feed stream to a third temperature to pyrolyze polyethylene; and separating hydrocarbons.

  8. A Research Needs Assessment for waste plastics recycling: Volume 1, Executive summary. Final report

    SciTech Connect (OSTI)

    NONE

    1994-12-01T23:59:59.000Z

    This first volume provides a summary of the entire project. The study utilized the talents of a large number of participants, including a significant number of peer reviewers from industrial companies, government agencies, and research institutes. in addition, an extensive analysis of relevant literature was carried out. In considering the attractiveness of recycling technologies that are alternatives to waste-to-energy combustion units, a systems approach was utilized. Collection of waste streams containing plastics, sortation, and reclamation of plastics and plastic mixtures, reprocessing or chemical conversion of the reclaimed polymers, and the applicability of the products to specific market segments have been analyzed in the study.

  9. Poly(lactic acid) degradable plastics, coatings, and binders

    SciTech Connect (OSTI)

    Bonsignore, P.V.; Coleman, R.D.; Mudde, J.P.

    1992-01-01T23:59:59.000Z

    Biochemical processes to derive value from the management of high carbohydrate food wastes, such as potato starch, corn starch, and cheese whey permeate, have typically been limited to the production of either ethanol or methane. Argonne National Laboratory (ANL) believes that lactic acid presents an attractive option for an alternate fermentation end product, especially in light of lactic acids' being a viable candidate for conversion to environmentally safe poly(lactic acid) (PLA) degradable plastics, coatings, and binders. Technology is being developed at ANL to permit a more cost effective route to modified high molecular weight PLA. Preliminary data on the degradation behavior of these modified PLAs shows the retention to the inherent hydrolytic degradability of the PLA modified, however, by introduced compositional variables. A limited study was done on the hydrolytic stability of soluble oligomers of poly(L-lactic acid). Over a 34 day hold period, water-methanol solutions of Pl-LA oligomers in the 2-10 DP range retained some 75% of their original molecular weight.

  10. Poly(lactic acid) degradable plastics, coatings, and binders

    SciTech Connect (OSTI)

    Bonsignore, P.V.; Coleman, R.D.; Mudde, J.P.

    1992-05-01T23:59:59.000Z

    Biochemical processes to derive value from the management of high carbohydrate food wastes, such as potato starch, corn starch, and cheese whey permeate, have typically been limited to the production of either ethanol or methane. Argonne National Laboratory (ANL) believes that lactic acid presents an attractive option for an alternate fermentation end product, especially in light of lactic acids` being a viable candidate for conversion to environmentally safe poly(lactic acid) (PLA) degradable plastics, coatings, and binders. Technology is being developed at ANL to permit a more cost effective route to modified high molecular weight PLA. Preliminary data on the degradation behavior of these modified PLAs shows the retention to the inherent hydrolytic degradability of the PLA modified, however, by introduced compositional variables. A limited study was done on the hydrolytic stability of soluble oligomers of poly(L-lactic acid). Over a 34 day hold period, water-methanol solutions of Pl-LA oligomers in the 2-10 DP range retained some 75% of their original molecular weight.

  11. Shear band dynamics from a mesoscopic modeling of plasticity

    E-Print Network [OSTI]

    E. A. Jagla

    2010-06-07T23:59:59.000Z

    The ubiquitous appearance of regions of localized deformation (shear bands) in different kinds of disordered materials under shear is studied in the context of a mesoscopic model of plasticity. The model may or may not include relaxational (aging) effects. In the absence of relaxational effects the model displays a monotonously increasing dependence of stress on strain-rate, and stationary shear bands do not occur. However, in start up experiments transient (although long lived) shear bands occur, that widen without bound in time. I investigate this transient effect in detail, reproducing and explaining a t^1/2 law for the thickness increase of the shear band that has been obtained in atomistic numerical simulations. Relaxation produces a negative sloped region in the stress vs. strain-rate curve that stabilizes the formation of shear bands of a well defined width, which is a function of strain-rate. Simulations at very low strain-rates reveal a non-trivial stick-slip dynamics of very thin shear bands that has relevance in the study of seismic phenomena. In addition, other non-stationary processes, such as stop-and-go, or strain-rate inversion situations display a phenomenology that matches very well the results of recent experimental studies.

  12. Predictors of plasticity in bituminous coals. Final technical report

    SciTech Connect (OSTI)

    Lloyd, W. G.; Reasoner, J. W.; Hower, J. C.; Yates, L. P.; Clark, C. P.; Davis, E.; Fitzpatrick, A.; Irefin, A.; Jiminez, A.; Jones, T. M.

    1984-02-01T23:59:59.000Z

    A group of 40 hvb coals, mostly from western Kentucky fields, has been examined with regard to ASTM Gieseler plastometric properties. Twenty-nine of these coals have also been studied over a range of temperatures by isothermal Gieseler plastometry. Raw Gieseler data provide melting and coking slopes and readily calculable fluidity spans. Maximum fluidity by slope intersection is a more consistent measure than observed maximum fluidity. Isothermal slopes and maximum fluidities follow Arrhenius temperature dependencies, with activation energies related systematically to fluid properties. These freshly sampled coals are also characterized by chemical, physical and petrographic criteria, by quantitative solvent extractions, by pyrolysis gas chromatography, by Fourier Transform infrared analysis of coals and extraction residues, by the HPLC analysis of coal extracts, and by optical microscopy of coals and Gieseler semi-coke residues. Multiple linear regression analysis yields three-term expressions which estimate maximum fluidities (both ASTM and isothermal) with R values of .90 to .92. Slopes and critical temperatures are similarly predictable. Plastometer experiments with selected coals under superatmospheric pressures show both melting slopes and maximum fluidities to be sharply increased, the latter by one to three orders of magnitude. Some suggestions are offered to accommodate this new information into the general body of knowledge concerning the phenomenon of plasticity in mid-ranked coals. 81 references, 28 figures, 40 tables.

  13. In vivo visualization of CaMKII activity in ocular dominance plasticity

    E-Print Network [OSTI]

    Kwok, Show Ming

    2009-01-01T23:59:59.000Z

    Alterations in sensory experience can persistently modify the responses of cortical neurons. Ocular dominance (OD) plasticity, a process in which alternation of visual input induces a shift in cortical responsiveness, is ...

  14. Detecting sub-MeV neutrons in solid plastic scintillator with gamma-ray discrimination

    E-Print Network [OSTI]

    Kovash, Michael A.

    We report on recent efforts to design a solid plastic scintillation hodoscope to measure neutron production cross sections at low energies. Our program includes not only the development of the detector itself, but also a ...

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

    SciTech Connect (OSTI)

    Roberts, Scott Alan; Schunk, Peter Randall

    2014-02-01T23:59:59.000Z

    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.

  16. Endochronic theory, non-linear kinematic hardening rule and generalized plasticity: a

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of Armstrong and Frederick (1966), in its original form as well as in the modified versions recently proposed important step for its formulation was the idea, suggested by Eisenberg and Phillips (1971), of a plasticity

  17. (The Elephant's Toothpaste Experiment) A clean 16 ounce plastic soda bottle

    E-Print Network [OSTI]

    Benitez-Nelson, Claudia

    (The Elephant's Toothpaste Experiment) A clean 16 ounce plastic soda bottle 1/2 cup 20-volume is sometimes called "Elephant's Toothpaste" because it looks like toothpaste coming out of a tube, but don

  18. Requirement for AMPA receptor endocytosis and long-term depression in ocular dominance plasticity

    E-Print Network [OSTI]

    Smith, Gordon Brawn

    2010-01-01T23:59:59.000Z

    The classic example of experience-dependent cortical plasticity is the ocular dominance (OD) shift in visual cortex following monocular deprivation (MD). As in other mammals with binocular vision, MD in mice induces ...

  19. On Coating Durability of Polymer Coated Sheet Metal under Plastic Deformation

    E-Print Network [OSTI]

    Huang, Yu-Hsuan

    2011-08-08T23:59:59.000Z

    process. Thus, the effect of plastic deformation on coating adhesion is of primary interest to many engineers and researchers. This research aims at developing a methodology to predict the adhesion of coating after metal forming processes. A pull...

  20. Measured Savings of DC to AC Drive Retrofit in Plastic Extrusion

    E-Print Network [OSTI]

    Sfeir, R. A.

    2008-01-01T23:59:59.000Z

    This paper presents the potential electrical energy efficiency improvements for utilizing alternating current (AC) motors controlled by variable frequency drives (VFD) in place of direct current (DC) motors to drive plastic extrusion machines. A...

  1. Sliding contact at plastically graded surfaces and applications to surface design

    E-Print Network [OSTI]

    Prasad, Anamika, 1979-

    2007-01-01T23:59:59.000Z

    Tailored gradation in elastic-plastic properties is known to offer avenues for suppressing surface damage during normal indentation and sliding contact. These graded materials have potential applications in diverse areas ...

  2. Comparison of generalized Hebbian rules for long-term synaptic plasticity

    E-Print Network [OSTI]

    1998-01-01T23:59:59.000Z

    A large variety of synaptic plasticity rules have been used in models of excitatory synaptic plasticity (Brown et al., 1990). These rules are generalizations of the Hebbian rule and have some properties consistent with experimental data on long-term excitatory synaptic plasticity, but they also have some properties inconsistent with experimental data. For example, the BCM rule (Bear et al., 1987; Bienenstock et al., 1982) produces homosynaptic potentiation and depression, which has been observed experimentally (Artola et al., 1990; Dudek & Bear, 1992; Kirkwood et al., 1993; Fr'egnac et al., 1994; Yang & Faber, 1991). But the BCM rule is also inconsistent with some experimental results; e.g., the BCM rule cannot produce heterosynaptic depression (Abraham & Goddard, 1983; Lynch et al., 1977). In addition, long-term synaptic plasticity in inhibitory pathways has been emphasized in some models of cortical function (Marshall, 1990abc, 1995a; Sirosh et al., 1996), but experimental data on in...

  3. Cortical Plasticity and Behavioral Recovery Following Focal Lesion to Primary Motor Cortex in Adult Rats

    E-Print Network [OSTI]

    Nishibe, Mariko

    2012-05-31T23:59:59.000Z

    and how to take advantage of neural plasticity to maximize the functional outcome. Rodent models are most often used not only for studying the role of motor cortex in motor skill learning but also in neurodegenerative research. To further elucidate...

  4. A coupled theory for diffusion of hydrogen and large elastic-plastic deformations of metals

    E-Print Network [OSTI]

    Di Leo, Claudio V

    2012-01-01T23:59:59.000Z

    A thermodynamically-consistent coupled-theory which accounts for diffusion of hydrogen, trapping of hydrogen, diffusion of heat, and large elastic-plastic deformations of metals is developed. Our theoretical framework ...

  5. Plasticity in the Rapid Escape Reflex of the Annelid Worm, Lumbriculus variegatus

    E-Print Network [OSTI]

    Lybrand, Zane

    2012-10-19T23:59:59.000Z

    Neural plasticity is the process by which anatomical (structural) and physiological (functional) changes in the nervous system of an organism lead to alterations in behavior. This dissertation examines the structural and functional changes...

  6. DEVELOPMENT OF FUEL AND VALUE-ADDED CHEMICALS FROM PYROLYSIS OF WOOD/WASTE PLASTIC MIXTURE.

    E-Print Network [OSTI]

    Bhattacharya, Priyanka

    2008-01-01T23:59:59.000Z

    ??Highly oxygenated compounds in bio-oil produce negative properties that have hampered fuel development. Copyrolysis with plastics has increased hydrogen content in past research. Py-GC/MS analyses (more)

  7. Investigation of conductivity switching upon action of monoaxial pressure on plasticized PVC films

    E-Print Network [OSTI]

    Vlasov, D V; Krystob, V I; Vlasova, T V

    2010-01-01T23:59:59.000Z

    The effect of conductivity switching of wideband polymers -plasticized PVC films under the influence of mono axial pressure is experimentally investigated. For various plasticizers the value of monoaxial pressure, causing jumps of conductivity on four and more orders, changes from units to hundreds bars, and the effect remains at a thickness of films of an order of hundreds micron, that is on two orders more than critical thickness for others wideband polymers. In addition to the reasons stated earlier on the interpretation of anomalies of plastic compounds conductivity, the phenomenological electron-molecular model of dynamic traps is considered, in which local transfer of charges is carried out by mobile segments of the plasticized polymer molecules.

  8. The influence of salinity on the mechanical behavior of high plasticity soils

    E-Print Network [OSTI]

    Fahy, Brian Patrick

    2014-01-01T23:59:59.000Z

    This thesis investigates the influence of salinity on the mechanical behavior of smectitic rich high plasticity soils resedimented with pore fluid salinities ranging from 0 to 256 g/L. An extensive laboratory testing program ...

  9. Effect of ausforming via severe plastic deformation on shape memory behavior of NiTi

    E-Print Network [OSTI]

    Kulkarni, Ajay V.

    2006-04-12T23:59:59.000Z

    , pseudelasticity, interplay between plastic deformation via dislocation slip and twinning, and forward and reverse martensitic transformation. The samples are processed at room temperature, i.e. slightly above the austenite finish temperature, and at 450 °C, i...

  10. Kinetic modeling of amyloid fibrillation and synaptic plasticity as memory loss and formation mechanisms

    E-Print Network [OSTI]

    Lee, Chuang-Chung

    2008-01-01T23:59:59.000Z

    The principles of biochemical kinetics and system engineering are applied to explain memory-related neuroscientific phenomena. Amyloid fibrillation and synaptic plasticity have been our focus of research due to their ...

  11. Improving Energy Efficiency at U.S. Plastics Manufacturing Plants: Summary Report and Case Studies

    SciTech Connect (OSTI)

    Not Available

    2005-09-01T23:59:59.000Z

    Industrial Technologies Programs BestPractices report based on a comprehensive plant assessment project with ITP's Industrial Assessment Center, The Society of the Plastics Industry, Inc., and several of its member companies.

  12. Austenite in Transformation-Induced Plasticity Steel Subjected to Multiple Isothermal Heat Treatments

    E-Print Network [OSTI]

    Duong, Van Tuan; Song, You Young; Park, Kyong-Su; Bhadeshia, H. K. D. H.; Suh, Dong-Woo

    2014-06-18T23:59:59.000Z

    of plastic instabilities during the course of deformation. In such circumstances, it is useful to conduct isothermal transformation at a high temperature where the rate of reaction is relatively rapid, followed by a lower temperature step that permits more...

  13. NON-CONTACT ACOUSTO-THERMAL SIGNATURES OF PLASTIC DEFORMATION IN TI-6AL-4V

    SciTech Connect (OSTI)

    Welter, J. T.; Jata, K. V.; Blodgett, M. P. [Materials and Manufacturing Directorate, Nondestructive Evaluation Branch Wright-Patterson AFB, OH 45433 (United States); Malott, G. [SOCHE, 3155 Research Blvd, Dayton, OH 45420 (United States); Schehl, N.; Sathish, S. [Structural Integrity Division, University of Dayton Research Institute, Dayton, OH 45469 (United States)

    2010-02-22T23:59:59.000Z

    Plastic deformation introduces changes in a material which include increases in: dislocations, strains, residual stress, and yield stress. However, these changes have a very small impact on the material properties such as elastic modulus, conductivity and ultrasonic wave speed. This is due to the fact that interatomic forces govern these properties, and they are not affected by plastic deformation to any large degree. This is evident from the fact that the changes in electrical resistance and ultrasonic velocity in plastically deformed and virgin samples are very small and can only be determined by highly controlled experiments. Except for X-ray diffraction, there are no direct nondestructive methods for measuring strain and the residual stress. This paper presents an application of the non-contact acousto-thermal signature (NCATS) NDE methodology to detect plastic deformation in flat dog bone Ti-6Al-4V samples. Results of the NCATS measurements on samples subjected to incremental amounts of plastic deformation are presented. The maximum temperature attained by the sample due to acoustic excitation is found to be sensitive to the amount of plastic strain. It is observed that the temperature induced by acoustic excitation increases to a peak followed by a decrease to failure. The maximum temperature peak occurs at plastic strains of 12-14%. It is observed that there is a correlation between the peak in maximum temperature rise and the strain at the experimentally determined ultimate tensile strength. A microstructural based explanation for this will be presented. The results are discussed in reference to utilizing this technique for detection and evaluation of plastic deformation.

  14. Thin film transistors on plastic substrates with reflective coatings for radiation protection

    DOE Patents [OSTI]

    Wolfe, Jesse D.; Theiss, Steven D.; Carey, Paul G.; Smith, Patrick M.; Wickboldt, Paul

    2003-11-04T23:59:59.000Z

    Fabrication of silicon thin film transistors (TFT) on low-temperature plastic substrates using a reflective coating so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The TFT can be used in large area low cost electronics, such as flat panel displays and portable electronics such as video cameras, personal digital assistants, and cell phones.

  15. A simple technique for gamma ray and cosmic ray spectroscopy using plastic scintillator

    E-Print Network [OSTI]

    Akhilesh P. Nandan; Sharmili Rudra; Himangshu Neog; S. Biswas; S. Mahapatra; B. Mohanty; P. K. Samal

    2015-04-10T23:59:59.000Z

    A new and simple technique has been developed using plastic scintillator detectors for gamma ray and cosmic ray spectroscopy without single channel analyzer (SCA) or multichannel analyzer (MCA). In these experiments only a leading edge discriminator (LED) and NIM scalers have been used. Energy calibration of gamma spectra in plastic scintillators has been done using Co$^{60}$ and Cs$^{137}$ sources. The details experimental technique, analysis procedure and experimental results has been presented in this article.

  16. Modeling the elastic and plastic response of single crystals and polycrystalline aggregates

    E-Print Network [OSTI]

    Patwardhan, Parag Vilas

    2005-02-17T23:59:59.000Z

    MODELING THE ELASTIC AND PLASTIC RESPONSE OF SINGLE CRYSTALS AND POLYCRYSTALLINE AGGREGATES A Thesis by PARAG VILAS PATWARDHAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2003 Major Subject: Mechanical Engineering MODELING THE ELASTIC AND PLASTIC RESPONSE OF SINGLE CRYSTALS AND POLYCRYSTALLINE AGGREGATES A Thesis by PARAG VILAS...

  17. A simple technique for gamma ray and cosmic ray spectroscopy using plastic scintillator

    E-Print Network [OSTI]

    Akhilesh P. Nandan; Sharmili Rudra; Himangshu Neog; S. Biswas; S. Mahapatra; B. Mohanty; P. K. Samal

    2014-12-30T23:59:59.000Z

    A new and simple technique has been developed using plastic scintillator detectors for gamma ray and cosmic ray spectroscopy without single channel analyzer (SCA) or multichannel analyzer (MCA). In these experiments only a leading edge discriminator (LED) and NIM scalers have been used. Energy calibration of gamma spectra in plastic scintillators has been done using Co$^{60}$ and Cs$^{137}$ sources. The details experimental technique, analysis procedure and experimental results has been presented in this article.

  18. Thin film transistors on plastic substrates with reflective coatings for radiation protection

    DOE Patents [OSTI]

    Wolfe, Jesse D. (Fairfield, CA); Theiss, Steven D. (Woodbury, MN); Carey, Paul G. (Mountain View, CA); Smith, Patrick M. (San Ramon, CA); Wickbold, Paul (Walnut Creek, CA)

    2006-09-26T23:59:59.000Z

    Fabrication of silicon thin film transistors (TFT) on low-temperature plastic substrates using a reflective coating so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The TFT can be used in large area low cost electronics, such as flat panel displays and portable electronics such as video cameras, personal digital assistants, and cell phones.

  19. Changes in mobility of plastic crystal ethanol during its transformation into the monoclinic crystal state

    SciTech Connect (OSTI)

    Sanz, Alejandro, E-mail: alejandro.sanz@csic.es; Nogales, Aurora; Ezquerra, Tiberio A. [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain)] [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain); Puente-Orench, Ins [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France) [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France); Instituto de Ciencia de Materiales de Aragn, ICMA-CSIC, Pedro Cerbuna 12, 50009 Zaragoza (Spain); Jimnez-Ruiz, Mnica [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France)] [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France)

    2014-02-07T23:59:59.000Z

    Transformation of deuterated ethanol from the plastic crystal phase into the monoclinic one is investigated by means of a singular setup combining simultaneously dielectric spectroscopy with neutron diffraction. We postulate that a dynamic transition from plastic crystal to supercooled liquid-like configuration through a deep reorganization of the hydrogen-bonding network must take place as a previous step of the crystallization process. Once these precursor regions are formed, subsequent crystalline nucleation and growth develop with time.

  20. The effect of stratigraphy and soil plasticity on the settlement characteristics of reclaimed surface mined land

    E-Print Network [OSTI]

    Rangel, Jorge Enrique

    1979-01-01T23:59:59.000Z

    THE EFFECT OF STRATIGRAPHY AND SOIL PLASTICITY ON THE SETTLEMENT CHARACTERISTICS OF FECLAIMED SURFACE MINED I~D A Thesis GORGE ENRIQUE RANGEL Submitted to the Graduate College of Texas ASM University in partial fulfillment of the regni ement... by (Chairman of Committee) (Membe") Member) (Head Department) ABSTRACT THE EFFECT OF STRATIGRAPHY AND SOIL PLASTICITY ON THE SETTLEHEN CHARACTERISTICS OF RECLAIMED SURFACE HINED LAND (December, 1979) Jorge Enrique Rangel, Geophysical Engineer Central...

  1. An evaluation of four hardening rules of the incremental theory of plasticity

    E-Print Network [OSTI]

    Hunsaker, Barry

    2012-06-07T23:59:59.000Z

    obtainable for almost any engineering material, this test will be employed throughout this text. In addition to prescribing the strain-hardening of the material, the hardening rule must also provide for the modification of the yield surface during plastic... OF SCIENCE December 1973 Major Subject: Aerospace Engineering AN EVALUATION OP POUR HARDENING RULES OF THE INCR MENTAL THEORY OF PLASTICITY A Thesis BARRY HUNSAKKR, JR. Approved as to style and content by: qChalrman of Cosraittee) (Head of Depar en...

  2. The Use of Commingled Plastic Lumber as Construction Materials Thomas J. Nosker, Ph.D., Richard W. Renfree, Ph.D.

    E-Print Network [OSTI]

    The Use of Commingled Plastic Lumber as Construction Materials Thomas J. Nosker, Ph.D., Richard W at avoiding land filling post-industrial and post-consumer plastics. This has resulted in creating a supply of impure plastics at much reduced prices with respect to virgin plastics. The possibility exists to clean

  3. Engineering Fracture MecMnics, 1971,Vol. 3, pp. 435-451. Pergamon Press. Printed inGreat Britain PLASTIC INTENSITY FACTORS FOR

    E-Print Network [OSTI]

    Hutchinson, John W.

    PLASTIC INTENSITY FACTORS FOR CRACKED PLATESt PETER D. HILTON and JOHN W. HUTCHINSON Harvard University, Cambridge, Mass. 02138, U.S.A. Abstract-An elastic-plastic analysis is performed for two problems relevant. Amplitudes of the dominant singularity in the plastic region at the crack tip, the plastic stress and strain

  4. Tensile Plasticity in Metallic Glasses with Pronounced Relaxations H. B. Yu, X. Shen, Z. Wang, L. Gu, W. H. Wang, and H. Y. Bai*

    E-Print Network [OSTI]

    Wang, Wei Hua

    Tensile Plasticity in Metallic Glasses with Pronounced #12; Relaxations H. B. Yu, X. Shen, Z. Wang plasticity achieved in a La-based metallic glass which possesses strong #12; relaxations and nanoscale of the structural units of plastic deformations and global plasticity, and the transition from brittle to ductile

  5. Gravitation as a Plastic Distortion of the Lorentz Vacuum

    E-Print Network [OSTI]

    Virginia V. Fernandez; Waldyr A. Rodrigues Jr

    2014-08-14T23:59:59.000Z

    In this paper we present a theory of the gravitational field where this field (a kind of square root of g) is represented by a (1,1)-extensor field h describing a plastic distortion of the Lorentz vacuum (a real substance that lives in a Minkowski spacetime) due to the presence of matter. The field h distorts the Minkowski metric extensor in an appropriate way (see below) generating what may be interpreted as an effective Lorentzian metric extensor g and also it permits the introduction of different kinds of parallelism rules on the world manifold, which may be interpreted as distortions of the parallelism structure of Minkowski spacetime and which may have non null curvature and/or torsion and/or nonmetricity tensors. We thus have different possible effective geometries which may be associated to the gravitational field and thus its description by a Lorentzian geometry is only a possibility, not an imposition from Nature. Moreover, we developed with enough details the theory of multiform functions and multiform functionals that permitted us to successfully write a Lagrangian for h and to obtain its equations of motion, that results equivalent to Einstein field equations of General Relativity (for all those solutions where the manifold M is diffeomorphic to R^4. However, in our theory, differently from the case of General Relativity, trustful energy-momentum and angular momentum conservation laws exist. We express also the results of our theory in terms of the gravitational potential 1-form fields (living in Minkowski spacetime) in order to have results which may be easily expressed with the theory of differential forms. The Hamiltonian formalism for our theory (formulated in terms of the potentials) is also discussed. The paper contains also several important Appendices that complete the material in the main text.

  6. Plastic ball and streamer chamber experiments at the Bevalac

    SciTech Connect (OSTI)

    Ritter, H.G.

    1982-07-01T23:59:59.000Z

    Single particle inclusive experiments, and experiments that additionally measure a few correlations like the associated multiplicity, have provided the main contribution to our present understanding of high energy heavy ion collisions. The results from those experiments are in overall agreement with calculations of the cascade and hydrodynamical models. In the cascade model the collision of two nuclei is simulated as a cascade of nucleon-nucleon collisions using measured N-N cross sections. The hydrodynamical model, on the other hand, describes the nuclear collision as that of two fluids and makes use of a nuclear equation of state relating thermal and compressional energy densities to pressure. The pressure field dominates the expansion phase and leads to collective flow of the reaction products in a preferred direction. The observation of such effects in inclusive experiments is not well established. Collective effects that manifest themselves in the shape of the event in phase space are expected to be seen best in the new complete event detectors that measure the final state as exclusively as presently possible by measuring most of the charged particles emitted in the reaction. In addition, those detectors are well suited to test macroscopic concepts such as equilibrium and temperature. Global methods like the sphericity or thrust analysis take into account all the correlations measured in the event and are specially designed to determine the shape of an event in phase space and thus to define a reaction plane. Recent data from the Plastic Ball and the streamer chamber experiments, the first complete event detectors in use at the Bevalac, are presented in this report.

  7. Continuous Severe Plastic Deformation Processing of Aluminum Alloys

    SciTech Connect (OSTI)

    Raghavan Srinivasan (PI); Prabir K. Chaudhury; Balakrishna Cherukuri; Qingyou Han; David Swenson; Percy Gros

    2006-06-30T23:59:59.000Z

    Metals with grain sizes smaller than 1-micrometer have received much attention in the past decade. These materials have been classified as ultra fine grain (UFG) materials (grain sizes in the range of 100 to 1000-nm) and nano-materials (grain size <100-nm) depending on the grain size. This report addresses the production of bulk UFG metals through the use of severe plastic deformation processing, and their subsequent use as stock material for further thermomechanical processing, such as forging. A number of severe plastic deformation (SPD) methods for producing bulk UFG metals have been developed since the early 1990s. The most promising of these processes for producing large size stock that is suitable for forging is the equal channel angular extrusion or pressing (ECAE/P) process. This process involves introducing large shear strain in the work-piece by pushing it through a die that consists of two channels with the same cross-sectional shape that meet at an angle to each other. Since the cross-sections of the two channels are the same, the extruded product can be re-inserted into the entrance channel and pushed again through the die. Repeated extrusion through the ECAE/P die accumulates sufficient strain to breakdown the microstructure and produce ultra fine grain size. It is well known that metals with very fine grain sizes (< 10-micrometer) have higher strain rate sensitivity and greater elongation to failure at elevated temperature, exhibiting superplastic behavior. However, this superplastic behavior is usually manifest at high temperature (> half the melting temperature on the absolute scale) and very low strain rates (< 0.0001/s). UFG metals have been shown to exhibit superplastic characteristics at lower temperature and higher strain rates, making this phenomenon more practical for manufacturing. This enables part unitization and forging more complex and net shape parts. Laboratory studies have shown that this is particularly true for UFG metals produced by SPD techniques. This combination of properties makes UFG metals produced by SPD very attractive as machining, forging or extrusion stock, both from the point of view of formability as well as energy and cost saving. However, prior to this work there had been no attempt to transfer these potential benefits observed in the laboratory scale to industrial shop floor. The primary reason for this was that the laboratory scale studies had been conducted to develop a scientific understanding of the processes that result in grain refinement during SPD. Samples that had been prepared in the laboratory scale were typically only about 10-mm diameter and 50-mm long (about 0.5-inch diameter and 2-inches long). The thrust of this project was three-fold: (i) to show that the ECAE/P process can be scaled up to produce long samples, i.e., a continuous severe plastic deformation (CSPD) process, (ii) show the process can be scaled up to produce large cross section samples that could be used as forging stock, and (iii) use the large cross-section samples to produce industrial size forgings and demonstrate the potential energy and cost savings that can be realized if SPD processed stock is adopted by the forging industry. Aluminum alloy AA-6061 was chosen to demonstrate the feasibility of the approach used. The CSPD process developed using the principles of chamber-less extrusion and drawing, and was demonstrated using rolling and wire drawing equipment that was available at Oak Ridge National Laboratory. In a parallel effort, ECAE/P dies were developed for producing 100-mm square cross section SPD billets for subsequent forging. This work was carried out at Intercontinental Manufacturing Co. (IMCO), Garland TX. Forging studies conducted with the ECAE/P billets showed that many of the potential benefits of using UFG material can be realized. In particular, the material yield can be increased, and the amount of material that is lost as scrap can be reduced by as much as 50%. Forging temperatures can also be reduced by over 150C, resulting in energy savings in the ope

  8. Comparison of Lithium Gadolinium Borate Crystal Shards in Scintillating and Nonscintillating Plastic Matrices

    E-Print Network [OSTI]

    Kareem Kazkaz; Nathaniel S. Bowden; Marisa Pedretti

    2011-09-16T23:59:59.000Z

    We present a method for detecting neutrons using scintillating lithium gadolinium borate crystal shards in a plastic matrix while maintaining high gamma rejection. We have procured two cylindrical detectors, 5"\\times5", containing 1% crystal by mass. Crystal shards have a typical dimension of 1 mm. One detector was made with scintillating plastic, and one with nonscintillating plastic. Pulse shape analysis was used to reject gamma ray backgrounds. The scintillating detector was measured to have an intrinsic fast fission neutron efficiency of 0.4% and a gamma sensitivity of less than 2.3 \\times 10-9, while the nonscintillating detector had a neutron efficiency of 0.7% and gamma sensitivity of (4.75\\pm3.94)\\times10-9. We determine that increasing the neutron detection efficiency by a factor of 2 will make the detector competitive with moderated 3He tubes, and we discuss several simple and straightforward methods for obtaining or surpassing such an improvement. We end with a discussion of possible applications, both for the scintillating-plastic and nonscintillating-plastic detectors.

  9. Controlled catalytic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers

    DOE Patents [OSTI]

    Evans, R.J.; Chum, H.L.

    1994-06-14T23:59:59.000Z

    A process is described using fast pyrolysis to convert a plastic waste feed stream containing polycarbonate and ABS to high value monomeric constituents prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of a given polymer to its high value monomeric constituents prior to a temperature range that causes pyrolysis of other plastic components; selecting an acid or base catalysts and an oxide or carbonate support for treating the feed stream to affect acid or base catalyzed reaction pathways to maximize yield or enhance separation of the high value monomeric constituents of polycarbonate and ABS in the first temperature program range; differentially heating the feed stream at a heat rate within the first temperature program range to provide differential pyrolysis for selective recovery of optimum quantities of the high value monomeric constituents prior to pyrolysis or other plastic components; separating the high value monomeric constituents from the polycarbonate to cause pyrolysis to a different high value monomeric constituent of the plastic waste and differentially heating the feed stream at the second higher temperature program range to cause pyrolysis of different high value monomeric constituents; and separating the different high value monomeric constituents. 68 figs.

  10. Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers

    DOE Patents [OSTI]

    Evans, Robert J. (Lakewood, CO); Chum, Helena L. (Arvada, CO)

    1994-01-01T23:59:59.000Z

    A process of using fast pyrolysis to convert a plastic waste feed stream containing polycarbonate and ABS to high value monomeric constituents prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of a given polymer to its high value monomeric constituents prior to a temperature range that causes pyrolysis of other plastic components; selecting an acid or base catalysts and an oxide or carbonate support for treating the feed stream to affect acid or base catalyzed reaction pathways to maximize yield or enhance separation of the high value monomeric constituents of polycarbonate and ABS in the first temperature program range; differentially heating the feed stream at a heat rate within the first temperature program range to provide differential pyrolysis for selective recovery of optimum quantities of the high value monomeric constituents prior to pyrolysis or other plastic components; separating the high value monomeric constituents from the polycarbonate to cause pyrolysis to a different high value monomeric constituent of the plastic waste and differentially heating the feed stream at the second higher temperature program range to cause pyrolysis of different high value monomeric constituents; and separating the different high value monomeric constituents.

  11. Plastic flow in a sheared polycrystalline solid using phase field model

    E-Print Network [OSTI]

    Santidan Biswas; Martin Grant; Indradev Samajdar; Arunansu Haldar; Anirban Sain

    2013-03-06T23:59:59.000Z

    Plastic deformation in solids induced by external shear stress is of huge practical interest. Presence of local crystalline order in polycrystals, consisting of many grains, distinguishes its deformation pattern from that of amorphous materials. Despite strong anisotropy, induced by external stress, the plastic flow and the consequent deformation field show strong dynamical heterogeneity. The distribution $P(u)$ of particle displacements ($u$) shows three distinct regimes including a power law scaling regime at moderate displacements. Using a phase field simulation we show how polycrystals generate saddle and vortex like flow patterns, which hitherto have been termed as elementary plastic events in the context of amorphous materials. Interestingly, such events here find natural explanation in terms of the underlying dislocation dynamics. We also characterize the spatial distribution of the flow field using Okubo-Weiss measure.

  12. Scale-up and Technology Transfer of Protein-based Plastic Products

    SciTech Connect (OSTI)

    Grewell, David

    2008-12-08T23:59:59.000Z

    Over the last number of years researchers at ISU have been developing protein based plastics from soybeans, funded by Soy Works Corporation. These materials have been characterized and the processing of these materials into prototype products has been demonstrated. A wide range of net-shape forming processes, including but not limited to extrusion, injection molding and compression molding have been studied. Issues, including technology transfer, re-formulation and product consistency, have been addressed partially during this contract. Also, commercial-scale processing parameters for protein based plastic products were designed, but not yet applicable in the industry. Support in the trouble shooting processing and the manufacturing of protein based plastic products was provided by Iowa State University during the one year contract.

  13. Predictors of plasticity in bituminous coals. Technical progress report No. 2, March 1, 1982

    SciTech Connect (OSTI)

    Lloyd, W. G.; Reasoner, J. W.; Hower, J. C.; Yates, L. P.; Clark, C. P.; Jones, T. M.; Sturgeon, L. P.; Whitt, J. M.

    1982-03-01T23:59:59.000Z

    The approach of this study is to secure three dozen (or more) coals of varying rank, composition and plasticity, and to analyze these coals carefully by standard chemical and petrographic techniques. The bitumen fractions will be determined, both by THF (asphaltenes but not preasphaltenes) and DMF (everything). Pyrolysis gas chromatography on both whole coals and extracted residues will compare capacities to generate metaplast. Extracts from coals with plasticities differing by at least four orders of magnitude will be examined for identifiable differences; extraction residues will be subjected to differential FTIR analysis. All of the data will be combined and subjected to systematic statistical analysis with the objective of identifying predictors of coal plasticity. This report describes the work in the first six months of the study. During this period equipment and instrumentation has been obtained, 24 coal samples have been obtained, the nonclassical methods have been developed and checked out, and an appreciable amount of experimentl data has been obtained.

  14. Plastic deformation of a model glass induced by a local shear transformation

    E-Print Network [OSTI]

    Nikolai V. Priezjev

    2014-08-28T23:59:59.000Z

    The effect of a local shear transformation on plastic deformation of a three-dimensional amorphous solid is studied using molecular dynamics simulations. We consider a spherical inclusion, which is gradually transformed into an ellipsoid of the same volume and then converted back into the sphere. It is shown that at sufficiently large strain amplitudes, the deformation of the material involves localized plastic events that were identified based on the relative displacement of atoms before and after the shear transformation. We found that the density profiles of cage jumps decay away from the inclusion, which correlates well with the radial dependence of the local deformation of the material. At the same strain amplitude, the plastic deformation becomes more pronounced in the cases of weakly damped dynamics or large time scales of the shear transformation.

  15. Method for measuring residual stresses in materials by plastically deforming the material and interference pattern comparison

    DOE Patents [OSTI]

    Pechersky, Martin J. (241 Chardonnat La., Aiken, SC 29803)

    1995-01-01T23:59:59.000Z

    A method for measuring residual stress in a material comprising the steps of establishing a speckle pattern on the surface with a first laser then heating a portion of that pattern with an infrared laser until the surface plastically deforms. Comparing the speckle patterns before and after deformation by subtracting one pattern from the other will produce a fringe pattern that serves as a visual and quantitative indication of the degree to which the plasticized surface responded to the stress dung heating and enables calculation of the stress.

  16. A traditional technique as an alternative to plastic sheet for covering urea-treated straw : digestibility and growth trials

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A traditional technique as an alternative to plastic sheet for covering urea-treated straw of the number of farmers treating straws. Therefore, an attempt was made to reduce the cost of urea treatment by using mud instead of plastic sheet to cover treated straws. Preliminary results of a digestibility

  17. 1Plastic deformation and fracture processes in metallic and ceramic nanomaterials... 2007 Advanced Study Center Co. Ltd.

    E-Print Network [OSTI]

    Ovid'ko Ilya A.

    1Plastic deformation and fracture processes in metallic and ceramic nanomaterials... 2007-mail: ovidko@def.ipme.ru PLASTIC DEFORMATION AND FRACTURE PROCESSES IN METALLIC AND CERAMIC NANOMATERIALS at the boundaries between the large grains and nanoscale matrix. In the framework of the model, cracks are generated

  18. Here, we present the fabrication and use of plastic Photonic Band Gap Bragg fibres in photonic textiles for applications in

    E-Print Network [OSTI]

    Skorobogatiy, Maksim

    Here, we present the fabrication and use of plastic Photonic Band Gap Bragg fibres in photonicsection, Bragg fibres feature periodic sequence of layers of two distinct plastics. Under ambient illumination SCHICKER2 , NING GUO1 , CHARLES DUBOIS3 , RACHEL WINGFIELD2 & MAKSIM SKOROBOGATIY1 COLOUR-ON-DEMAND

  19. A study of large plastic deformations in dual phase steel using digital image correlation and FE analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 A study of large plastic deformations in dual phase steel using digital image correlation and FE phase steel DP800 is studied experimentally and numerically. Shear testing is applied to obtain large Materials and Chemistry, NO-7465 Trondheim, Norway Abstract Large plastic deformation in sheets made of dual

  20. Industrial innovations for tomorrow: Advances in industrial energy-efficiency technologies. Degradable plastic made from potato peels

    SciTech Connect (OSTI)

    Not Available

    1992-07-01T23:59:59.000Z

    Stimulated by public demand and state and federal legislation, industry has begun to develop bio- and photo- degradable plastics. so far, however, none of these degradable plastics meets all of the criteria for success - adequate physical and mechanical properties for the desired use, cost-effectiveness, and 100% degradability. Polylactic acid (PLA) plastic is one degradable plastic that shows promise. It has the desired properties and is 100% degradable. However, PLA plastic made by conventional techniques is not cost effective. Made from lactic acid, which is typically made form petroleum using a very costly synthesis process. Lactic acid can also be made from carbohydrates (starches), found in food processing wastes such as potato wastes, cheese whey, and sorghum. Conversion of starch to simple sugars, and fermentation of these sugars can produce lactic acid.

  1. Plasticity of Language-Related Brain Function During Recovery from Stroke

    E-Print Network [OSTI]

    Plasticity of Language-Related Brain Function During Recovery from Stroke Keith R. Thulborn, MD, Ph to correlate functional recovery from aphasia after acute stroke with the temporal evolution of the anatomic during recovery from acute stroke presenting with aphasia. Perfusion, diffusion, sodium, and conventional

  2. Progress in Neurobiology 73 (2004) 6172 Motor rehabilitation and brain plasticity after hemiparetic stroke

    E-Print Network [OSTI]

    Schaechter, Judith D.

    hemiparetic stroke Judith D. Schaechter MGH/MIT/HMS, Athinoula A. Martinos Center for Biomedical Imaging, 13th of motor rehabilitation and brain plasticity on recovery after hemiparetic stroke. It discusses the impact of intensive post-stroke motor rehabilitation on motor recovery. This is followed by an overview of our current

  3. Experiments for calibration and validation of plasticity and failure material modeling: 304L stainless steel.

    SciTech Connect (OSTI)

    Lee, Kenneth L.; Korellis, John S.; McFadden, Sam X.

    2006-01-01T23:59:59.000Z

    Experimental data for material plasticity and failure model calibration and validation were obtained from 304L stainless steel. Model calibration data were taken from smooth tension, notched tension, and compression tests. Model validation data were provided from experiments using thin-walled tube specimens subjected to path dependent combinations of internal pressure, extension, and torsion.

  4. Effect of plastic deformation on the formation of acicular ferrite C.H. Lee a,1

    E-Print Network [OSTI]

    Cambridge, University of

    Effect of plastic deformation on the formation of acicular ferrite C.H. Lee a,1 , H deformation on the transformation of austenite to acicular ferrite in a FeÁ/MnÁ/SiÁ/C alloy steel containing non-metallic inclusions was investigated. The transformation to acicular ferrite is retarded

  5. Development/Plasticity/Repair A Structural MRI Study of Human Brain Development from

    E-Print Network [OSTI]

    Utah, University of

    Development/Plasticity/Repair A Structural MRI Study of Human Brain Development from Birth to 2 Carolina, Chapel Hill, North Carolina 27599-7510 Brain development in the first 2 years after birth and schizophrenia. Knowledge regarding this period is currently quite limited. We studied structural brain

  6. Differential synaptic plasticity of the corticostriatal and thalamostriatal systems in an MPTP-treated monkey

    E-Print Network [OSTI]

    Hall, Randy A

    Differential synaptic plasticity of the corticostriatal and thalamostriatal systems in an MPTP-treated of striatal glutamatergic inputs in methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated monkeys using that the prevalence of vGluT1-containing terminals is significantly increased in the striatum of MPTP-treated monkeys

  7. Use of polymer/ionic liquid plasticizers as gel electrolytes in electrochromic devices

    E-Print Network [OSTI]

    Otero, Toribio Fernández

    Use of polymer/ionic liquid plasticizers as gel electrolytes in electrochromic devices H. Bircana polymer configuration is commonly used when constructing electrochromic devices (ECDs) due to the expected)thienyl)-N-methylcarbazole] (PBEDOT-NMCz) as the two complementary electrochromic polymers for the device. A variety of gel

  8. Aerosol-Jet-Printed, 1 Volt HBridge Drive Circuit on Plastic with Integrated Electrochromic Pixel

    E-Print Network [OSTI]

    Kim, Chris H.

    Aerosol-Jet-Printed, 1 Volt HBridge Drive Circuit on Plastic with Integrated Electrochromic Pixel electrochromic (EC) pixel as large as 4 mm2 that is printed on the same substrate. All of the key components, flexible electronics, electrochromic pixel, transistor, capacitor, ion gel 1. INTRODUCTION Printing

  9. Developmental Plasticity of Cochliomyia macellaria Fabricius (Diptera: Calliphoridae) from Three Distinct Ecoregions in Texas

    E-Print Network [OSTI]

    Owings, Charity Grace 1987-

    2012-12-11T23:59:59.000Z

    ......................................................................................................... ix CHAPTER I INTRODUCTION AND LITERATURE REVIEW ................................ 1 Ephemeral Resources ......................................................................................... 9 Blow Fly Diversity in Texas......................................................................................................................138 vii LIST OF FIGURES Page Figure 1. Reaction norm plots for phenotypic variation, including genetic variance (a), plasticity due to environmental changes (b), and genotype by environment (GxE) interactions (c...

  10. Grain refinement and texture development of cast bi90sb10 alloy via severe plastic deformation

    E-Print Network [OSTI]

    Im, Jae-taek

    2009-05-15T23:59:59.000Z

    The purpose of this work was to study learn about grain refinement mechanisms and texture development in cast n-type Bi90Sb10 alloy caused by severe plastic deformation. The practical objective is to produce a fine grained and textured...

  11. Reactor antineutrino monitoring with a plastic scintillator array as a new safeguards method

    E-Print Network [OSTI]

    S. Oguri; Y. Kuroda; Y. Kato; R. Nakata; Y. Inoue; C. Ito; M. Minowa

    2014-05-23T23:59:59.000Z

    We developed a segmented reactor-antineutrino detector made of plastic scintillators for application as a tool in nuclear safeguards inspection and performed mostly unmanned field operations at a commercial power plant reactor. At a position outside the reactor building, we measured the difference in reactor antineutrino flux above the ground when the reactor was active and inactive.

  12. Number Plastic Type Common Items Number of Items (tally) 1 polyethylene terephthalate

    E-Print Network [OSTI]

    Schladow, S. Geoffrey

    End Time: Number Plastic Type Common Items Number of Items (tally) 1 polyethylene terephthalate and vegetable oil containers; ovenable food trays. 2 high density polyethylene Milk jugs, juice bottles; bleach, piping, candy wrappers 4 low density polyethylene Squeezable bottles; bread, frozen food, dry cleaning

  13. Neural Plasticity in Human Brain Connectivity: The Effects of Long Term Deep Brain Stimulation of the

    E-Print Network [OSTI]

    Deco, Gustavo

    Neural Plasticity in Human Brain Connectivity: The Effects of Long Term Deep Brain Stimulation of Oxford, Oxford, United Kingdom, 3 Center of Brain and Cognition, Theoretical and Computational are now well established for deep brain stimulation, but little is known about the effects of long

  14. Large Plastic Deformation in High-Capacity Lithium-Ion Batteries Caused by Charge and Discharge

    E-Print Network [OSTI]

    Suo, Zhigang

    Large Plastic Deformation in High-Capacity Lithium-Ion Batteries Caused by Charge and Discharge, Massachusetts 02138 Evidence has accumulated recently that a high-capacity elec- trode of a lithium-ion battery in the particle is high, possibly leading to fracture and cavitation. I. Introduction LITHIUM-ION batteries

  15. Responding to environmental change: plastic responses1 vary little in a synchronous breeder.2

    E-Print Network [OSTI]

    Nussey, Dan

    The impact of environmental change on animal populations is strongly influenced by the10 ability. 2002).5 Determining how individuals base key life-history decisions on environmental cues is6 therefore1 Responding to environmental change: plastic responses1 vary little in a synchronous breeder.2 3

  16. Stock No. Description Units Price BOT-415 Plastic Bottles 4L ea $7.64

    E-Print Network [OSTI]

    Crawford, T. Daniel

    Stock No. Description Units Price BOT-415 Plastic Bottles 4L ea $7.64 BOT-416 Safety Bottle Carrier Red ea $49.26 BOT-417 Safety Bottle Carrier BLK ea $49.26 DET-245 Acetone d 10X1G pack $15.52 DET-250

  17. Blow up Balloon with Baking Soda One small empty plastic soda or water bottle

    E-Print Network [OSTI]

    Benitez-Nelson, Claudia

    Blow up Balloon with Baking Soda One small empty plastic soda or water bottle 1/2 cup of vinegar Small balloon Baking soda Funnel or piece of paper 1. Carefully pour the vinegar into the bottle. 2 and some tape. 3. Now carefully put the neck of the balloon all the way over the neck of the bottle without

  18. Stock No. Description Units Price BOT-415 Plastic Bottles 4L ea $7.09

    E-Print Network [OSTI]

    Crawford, T. Daniel

    Stock No. Description Units Price BOT-415 Plastic Bottles 4L ea $7.09 BOT-416 Safety Bottle Carrier Red ea $47.79 BOT-417 Safety Bottle Carrier BLK ea $47.79 DET-245 Acetone d 10X1G pack $14.16 DET

  19. On the formulation, parameter identification and numerical integration of the EMMI model :plasticity and isotropic damage.

    SciTech Connect (OSTI)

    Bammann, Douglas J.; Johnson, G. C. (University of California, Berkeley, CA); Marin, Esteban B.; Regueiro, Richard A. (University of Colorado, Boulder, CO)

    2006-01-01T23:59:59.000Z

    In this report we present the formulation of the physically-based Evolving Microstructural Model of Inelasticity (EMMI) . The specific version of the model treated here describes the plasticity and isotropic damage of metals as being currently applied to model the ductile failure process in structural components of the W80 program . The formulation of the EMMI constitutive equations is framed in the context of the large deformation kinematics of solids and the thermodynamics of internal state variables . This formulation is focused first on developing the plasticity equations in both the relaxed (unloaded) and current configurations. The equations in the current configuration, expressed in non-dimensional form, are used to devise the identification procedure for the plasticity parameters. The model is then extended to include a porosity-based isotropic damage state variable to describe the progressive deterioration of the strength and mechanical properties of metals induced by deformation . The numerical treatment of these coupled plasticity-damage constitutive equations is explained in detail. A number of examples are solved to validate the numerical implementation of the model.

  20. PERMIT MUST BE AVAILABLE AT ENTRY LOCATION IN PLASTIC SLEEVE CONFINED SPACE ENTRY PERMIT

    E-Print Network [OSTI]

    Stuart, Steven J.

    PERMIT MUST BE AVAILABLE AT ENTRY LOCATION IN PLASTIC SLEEVE CONFINED SPACE ENTRY PERMIT CONFINED SPACE GENERAL INFORMATION: Permit Number: Call 656-1297 Date: Equipment Number: Time Issued: Valid Until (Time, max. 8 hrs): Confined Space Description and Location: Purpose of Entry: PERMIT SPACE HAZARDS

  1. A perturbation analysis of the unstable plastic flow pattern evolution in an aluminum alloy

    E-Print Network [OSTI]

    Tong, Wei

    A perturbation analysis of the unstable plastic flow pattern evolution in an aluminum alloy Seung Abstract In the tensile loading of sheet metals made from some polycrystalline aluminum alloys, a single in the uniaxial tension of polycrystalline aluminum alloys with periodic stress relaxations depends

  2. Coupled Damage and Plasticity Modelling in Transient Dynamic Analysis of Concrete

    E-Print Network [OSTI]

    Coupled Damage and Plasticity Modelling in Transient Dynamic Analysis of Concrete F. Gatuingt Abstract In a concrete structure subjected to an explosion, for example a concrete slab, the material on the same concrete. Computations of split Hopkinson tests on confined concrete, a tensile test with scabbing

  3. The Use of Hollow Plastic Balls as Energy Conservation Devices in Heated Open Tanks

    E-Print Network [OSTI]

    Byrne, T. J.

    1983-01-01T23:59:59.000Z

    The problem of heat losses from open liquid filled tanks is as old as industry itself. This paper will present the advantages of using an insulating blanket of hollow plastic spheres as a mechanism to conserve this type of industrial energy loss...

  4. Transformation plasticity and thermoelastic behavior in ZrO2-containing ceramics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    565 Transformation plasticity and thermoelastic behavior in ZrO2-containing ceramics A. H. Heuer plasticité de transformation dans ZrO2, qui est responsable de la ré- sistance mécanique et de la grande profit. Dans certaines conditions, cette transformation est réversible, autocatalytique et

  5. Development/Plasticity/Repair Identification of Modulators of Hair Cell Regeneration in the

    E-Print Network [OSTI]

    Rubel, Edwin

    Development/Plasticity/Repair Identification of Modulators of Hair Cell Regeneration compounds that modulate hair cell regeneration in zebrafish. Of the 1680 compounds evaluated, we identified,aresyntheticglucocorticoidsthatpotentiatedhaircellnumbersduringregenerationandalsoinducedhair cell addition in the absence of damage. BrdU analysis confirmed that the extra hair cells arose from

  6. Development/Plasticity/Repair Hair Cell Replacement in Adult Mouse Utricles after

    E-Print Network [OSTI]

    Rubel, Edwin

    Development/Plasticity/Repair Hair Cell Replacement in Adult Mouse Utricles after Targeted Ablation of Hair Cells with Diphtheria Toxin Justin S. Golub,1 Ling Tong,1 Tot B. Ngyuen,1 Cliff R. Hume,1 Richard developed a transgenic mouse to permit conditional and selective ablation of hair cells in the adult mouse

  7. J. Micromech. Microeng. 10 (2000) 395400. Printed in the UK PII: S0960-1317(00)11869-8 Silicon-processed plastic

    E-Print Network [OSTI]

    Lin, Liwei

    -processed plastic micropyramids for brightness enhancement applications Liwei Lin§, T K Shia and C-J Chiu is used to demonstrate the feasibility of manufacturing plastic micropyramids. These micropyramids have micromachined and used directly in the micro hot embossing process by applying plastic sheets made of polymethyl

  8. Plastic Phenotypic Response to Light of 16 Congeneric Shrubs from a Panamanian Rainforest Author(s): Fernando Valladares, S. Joseph Wright, Eloisa Lasso, Kaoru Kitajima, Robert W.

    E-Print Network [OSTI]

    Saleska, Scott

    Plastic Phenotypic Response to Light of 16 Congeneric Shrubs from a Panamanian Rainforest Author, 81(7), 2000, pp. 1925-1936 ? 2000 by the Ecological Society of America PLASTIC PHENOTYPIC RESPONSE of California, Davis, California 95616 USA Abstract. The comparative phenotypic plasticity of 16 species

  9. Auklet (Charadriiformes: Alcidae, Aethia spp.) chick meals from the Aleutian Islands, Alaska, have a very low incidence of plastic marine debris

    E-Print Network [OSTI]

    Jones, Ian L.

    , have a very low incidence of plastic marine debris Alexander L. Bond a,*, Ian L. Jones a , Jeffrey C t i c l e i n f o Keywords: Plastic Marine debris North Pacific Ocean Auklet Aethia Aleutian Islands a b s t r a c t The ingestion of plastic marine debris is a chronic problem for some of the world

  10. J. Non-Newtonian Fluid Mech. 143 (2007) 3847 Flow development in compression of a finite amount of a Bingham plastic

    E-Print Network [OSTI]

    Georgiou, Georgios

    of a Bingham plastic Georgios C. Floridesa, Andreas N. Alexandroua, Georgios C. Georgioub, a Mechanical amount of a Bingham plastic is investigated by means of numerical simulations. The problem relates is modelled in Lagrangian coordinates using the Papanastasiou regularization for the Bingham plastic

  11. Plastic is one of the most versatile materials available. It is cheap, flexible and easy to process, and as a result

    E-Print Network [OSTI]

    Andelman, David

    Plastic is one of the most versatile materials available. It is cheap, flexible and easy to process- cations is as an insulating coating for electric wires; indeed, plastic is well known for its insulating of plastics was discovered that displayed exactly the opposite beha- viour ­ the ability to conduct

  12. Conformational plasticity of the influenza A M2 transmembrane helix in lipid bilayers under varying pH, drug binding, and membrane thickness

    E-Print Network [OSTI]

    Hong, Mei

    Conformational plasticity of the influenza A M2 transmembrane helix in lipid bilayers under varying cues, thus conformational plasticity is important for function. The influenza A M2 protein forms spectroscopy to examine the conformational plasticity of membrane-bound transmembrane domain of M2 (M2TM). 13 C

  13. Clinical prototype of a plastic water-equivalent scintillating fiber dosimeter array for QA applications

    SciTech Connect (OSTI)

    Lacroix, Frederic; Archambault, Louis; Gingras, Luc; Guillot, Mathieu; Beddar, A. Sam; Beaulieu, Luc [Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec, G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada); Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030 (United States); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada); Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030 (United States); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec, G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada)

    2008-08-15T23:59:59.000Z

    A clinical prototype of a scintillating fiber dosimeter array for quality assurance applications is presented. The array consists of a linear array of 29 plastic scintillation detectors embedded in a water-equivalent plastic sheet coupled to optical fibers used to guide optical photons to a charge coupled device (CCD) camera. The CCD is packaged in a light-tight, radiation-shielded housing designed for convenient transport. A custom designed connector is used to ensure reproducible mechanical positioning of the optical fibers relative to the CCD. Profile and depth dose characterization measurements are presented and show that the prototype provides excellent dose measurement reproducibility ({+-}0.8%) in-field and good accuracy ({+-}1.6% maximum deviation) relative to the dose measured with an IC10 ionization chamber.

  14. Understanding plastic deformation in thermal glasses from single-soft-spot dynamics

    E-Print Network [OSTI]

    Samuel S. Schoenholz; Andrea J. Liu; Robert A. Riggleman; Joerg Rottler

    2014-04-04T23:59:59.000Z

    By considering the low-frequency vibrational modes of amorphous solids, Manning and Liu [Phys. Rev. Lett. 107, 108302 (2011)] showed that a population of "soft spots" can be identified that are intimately related to plasticity at zero temperature under quasistatic shear. In this work we track individual soft spots with time in a two-dimensional sheared thermal Lennard Jones glass at temperatures ranging from deep in the glassy regime to above the glass transition temperature. We show that the lifetimes of individual soft spots are correlated with the timescale for structural relaxation. We additionally calculate the number of rearrangements required to destroy soft spots, and show that most soft spots can survive many rearrangements. Finally, we show that soft spots are robust predictors of rearrangements at temperatures well into the super-cooled regime. Altogether, these results pave the way for mesoscopic theories of plasticity of amorphous solids based on dynamical behavior of individual soft spots.

  15. Is inner core seismic anisotropy a marker of plastic flow of cubic iron?

    E-Print Network [OSTI]

    Lincot, A; Cardin, Philippe

    2015-01-01T23:59:59.000Z

    This paper investigates whether observations of seismic anisotropy are compatible with a cubic structure of the inner core Fe alloy. We assume that anisotropy is the result of plastic deformation within a large scale flow induced by preferred growth at the inner core equator. Based on elastic moduli from the literature, bcc- or fcc-Fe produce seismic anisotropy well below seismic observations ($\\textless{}0.4\\%$). A Monte-Carlo approach allows us to generalize this result to any form of elastic anisotropy in a cubic system. Within our model, inner core global anisotropy is not compatible with a cubic structure of Fe alloy. Hence, if the inner core material is indeed cubic, large scale coherent anisotropic structures, incompatible with plastic deformation induced by large scale flow, must be present.

  16. An elastic, plastic, viscous model for slow shear of a liquid foam

    E-Print Network [OSTI]

    Philippe Marmottant; Franois Graner

    2007-07-06T23:59:59.000Z

    We suggest a scalar model for deformation and flow of an amorphous material such as a foam or an emulsion. To describe elastic, plastic and viscous behaviours, we use three scalar variables: elastic deformation, plastic deformation rate and total deformation rate; and three material specific parameters: shear modulus, yield deformation and viscosity. We obtain equations valid for different types of deformations and flows slower than the relaxation rate towards mechanical equilibrium. In particular, they are valid both in transient or steady flow regimes, even at large elastic deformation. We discuss why viscosity can be relevant even in this slow shear (often called "quasi-static") limit. Predictions of the storage and loss moduli agree with the experimental literature, and explain with simple arguments the non-linear large amplitude trends.

  17. An elastic-perfectly plastic flow model for finite element analysis of perforated materials

    SciTech Connect (OSTI)

    Jones, D.P.; Gordon, J.L.; Hutula, D.N.; Banas, D.; Newman, J.B.

    1999-02-01T23:59:59.000Z

    This paper describes the formulation of an elastic-perfectly plastic flow theory applicable to equivalent solid [EQS] modeling of perforated materials. An equilateral triangular array of circular penetrations is considered. The usual assumptions regarding geometry and loading conditions applicable to the development of elastic constants for EQS modeling of perforated plates are considered to apply here. An elastic-perfectly plastic [EPP] EQS model is developed for a collapse surface that includes fourth-order stress terms. The fourth order yield function has been shown to be appropriate for plates with a triangular array of circular holes. A complete flow model is formulated using the consistent tangent modulus approach based on the fourth order yield function.

  18. Prospects for energy recovery from plastic waste gasifiers by means of MHD topping cycle

    SciTech Connect (OSTI)

    Geri, A.; Verdone, N.; Salvini, A.

    1999-12-01T23:59:59.000Z

    In this paper the authors present a feasibility study of a combined MagnetoHydroDynamic (MHD) and steam turbine plant in which the working gas is made of burnt plastic waste. The possibility of MHD retrofit of existing plant, especially fed by fossil fuel, is well known, and has been studied both for its economical and environmental benefits. The environmental impact and the elimination of pollution agents has become a prime necessity in waste digestion. Furthermore, plants in which the production of electrical power by means of burnt gases produced in the digestion process have been designed and built. In this field an MHD integration plant could be very attractive. This feasibility study has been developed by simulating an ideal plant with a plastic incinerator, an MHD device and conventional steam turbines. As a result, the simulations have indicated economic and environmental advantages with notable efficiency improvements in the generation of electrical power.

  19. A Nonlocal Peridynamic Plasticity Model for the Dynamic Flow and Fracture of Concrete.

    SciTech Connect (OSTI)

    Vogler, Tracy; Lammi, Christopher James

    2014-10-01T23:59:59.000Z

    A nonlocal, ordinary peridynamic constitutive model is formulated to numerically simulate the pressure-dependent flow and fracture of heterogeneous, quasi-brittle ma- terials, such as concrete. Classical mechanics and traditional computational modeling methods do not accurately model the distributed fracture observed within this family of materials. The peridynamic horizon, or range of influence, provides a characteristic length to the continuum and limits localization of fracture. Scaling laws are derived to relate the parameters of peridynamic constitutive model to the parameters of the classical Drucker-Prager plasticity model. Thermodynamic analysis of associated and non-associated plastic flow is performed. An implicit integration algorithm is formu- lated to calculate the accumulated plastic bond extension and force state. The gov- erning equations are linearized and the simulation of the quasi-static compression of a cylinder is compared to the classical theory. A dissipation-based peridynamic bond failure criteria is implemented to model fracture and the splitting of a concrete cylinder is numerically simulated. Finally, calculation of the impact and spallation of a con- crete structure is performed to assess the suitability of the material and failure models for simulating concrete during dynamic loadings. The peridynamic model is found to accurately simulate the inelastic deformation and fracture behavior of concrete during compression, splitting, and dynamically induced spall. The work expands the types of materials that can be modeled using peridynamics. A multi-scale methodology for simulating concrete to be used in conjunction with the plasticity model is presented. The work was funded by LDRD 158806.

  20. The effects of plasticization and storage on quality of freeze-dried and compressed carrot bars

    E-Print Network [OSTI]

    Greaves, Donald William

    1978-01-01T23:59:59.000Z

    of this study were: To evaluate the effects of selected plasticizing methods on quality of stored freeze-dried compressed carrot cubes. To evaluate the effects of storage temperature on quality of freeze-dried compressed carrot cubes. To subjectively... carrots. than for those which had not been compressed before storage. Retention was much lower for compressed carrots packed in air compared to those packed in an inert gas or in vacuum (Hendel, 1973). Subjective Analysis Although taste panel...

  1. A study of Poisson's ratio and the elastic and plastic properties of Ottawa sand

    E-Print Network [OSTI]

    Werner, Robert Rehm

    1957-01-01T23:59:59.000Z

    in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Mayq 1957 Ma)or Sub)acts Civil Engineering A STUDY OF POISSON'S RATIO AND THE ELASTIC AND PLASTIC PROPERTIES OF OTTAWA SAND A Thesis ROSERT RENT WZmne Captain, Corps...' IHTRODUCTIOS Engineering achievements have paced the rise oi civilization through the ages. Today the cries for greater strength, capacity and economy are heard with ever increasing frequency. Transportation and defense requirements have never lagged...

  2. Dissipative scale effects in strain-gradient plasticity: the case of simple shear

    E-Print Network [OSTI]

    Maria Chiricotto; Lorenzo Giacomelli; Giuseppe Tomassetti

    2015-01-22T23:59:59.000Z

    We answer in the affirmative to a conjecture formulated in [L. Anand et. al. (2005) J. Mech. Phys. Solids, 53:1789--1826] concerning a variational characterization of the \\emph{actual yield strength} $\\tau_Y$, the threshold for the inset of plastic flow, in a thin strip undergoing simple shear. Moreover, we find a new formula relating $\\tau_Y$ to the height of the strip. Our formula confirms that thinner specimens display higher actual yield strength.

  3. Perfect plasticity of metals under simple shear as the result of percolation transition on grain boundaries

    E-Print Network [OSTI]

    Yan Beygelzimer; Natalia Lavrinenko

    2012-06-22T23:59:59.000Z

    A mechanism of perfect plasticity under low homological temperatures has been suggested. According to this mechanism, the phenomenon under study is of critical nature. It connects with percolation transition in the net of grain boundaries and with nonlocal interaction of fragments uniquely under simple shear mode. The mechanism is justified by general reasoning, mainly of geometrical character, and also by employing computational modeling and well-known experimental results.

  4. Toxic species emissions from controlled combustion of selected rubber and plastic consumer products

    E-Print Network [OSTI]

    Caraballo, Simon A.

    1992-01-01T23:59:59.000Z

    by the thermal oxidation or pyrolysis of the various chemical species present in the rubber product may remain in the ash once the material has burned, or be given off as smoke particulates or gases during incineration. The partitioning of contaminants... airborne or ash phase) when selected plastics or rubberized materials undergo controlled combustion. The results are indicative of what can occur in municipal incinerators or as a result of residential or industrial Ares or the intentional burning...

  5. IDENTIFICATION OF DAMAGE TYPES IN CARBON FIBER REINFORCED PLASTIC LAMINATES BY A NOVEL OPTICAL FIBER ACOUSTIC EMISSION SENSOR

    E-Print Network [OSTI]

    Boyer, Edmond

    IDENTIFICATION OF DAMAGE TYPES IN CARBON FIBER REINFORCED PLASTIC LAMINATES BY A NOVEL OPTICAL technology. PZT sensors have been being used as AE sensors. However, because this kind of sensor has bulk

  6. Deformation Analysis of Sand Specimens using 3D Digital Image Correlation for the Calibration of an Elasto-Plastic Model

    E-Print Network [OSTI]

    Song, Ahran

    2012-10-19T23:59:59.000Z

    of the kinematic and volumetric conditions of the specimen at different stages of deformation, combined with the readings of the global axial compression of the specimen. This allowed for the characterization of a Mohr-Coulomb plasticity model with hardening...

  7. Effects of the spike timing-dependent plasticity on the synchronisation in a random Hodgkin-Huxley neuronal network

    E-Print Network [OSTI]

    R. R. Borges; F. S. Borges; A. M. Batista; E. L. Lameu; R. L. Viana; K. C. Iarosz; I. L. Caldas; M. A. F. Sanjun

    2015-03-07T23:59:59.000Z

    In this paper, we study the effects of spike timing-dependent plasticity on synchronisation in a network of Hodgkin-Huxley neurons. Neuron plasticity is a flexible property of a neuron and its network to change temporarily or permanently their biochemical, physiological, and morphological characteristics, in order to adapt to the environment. Regarding the plasticity, we consider Hebbian rules, specifically for spike timing-dependent plasticity (STDP), and with regard to network, we consider that the connections are randomly distributed. We analyse the synchronisation and desynchronisation according to an input level and probability of connections. Moreover, we verify that the transition for synchronisation depends on the neuronal network architecture, and the external perturbation level.

  8. PART OF A SPECIAL ISSUE ON PLANT MATING SYSTEMS Variation in inbreeding depression and plasticity across native

    E-Print Network [OSTI]

    Dudash, Michele R.

    architectural traits measured. The absolute value of plasticity showed the most marked difference between home research has demonstrated that a wide range of envir- onmental factors influence inbreeding depression (e

  9. Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics

    DOE Patents [OSTI]

    Jody, Bassam J. (Chicago, IL); Arman, Bayram (Amherst, NY); Karvelas, Dimitrios E. (Downers Grove, IL); Pomykala, Jr., Joseph A. (Crest Hill, IL); Daniels, Edward J. (Oak Lawn, IL)

    1997-01-01T23:59:59.000Z

    An improved method is provided for separating acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) plastics from each other. The ABS and HIPS plastics are shredded to provide a selected particle size. The shredded particles of the ABS and HIPS plastics are applied to a solution having a solution density in a predefined range between 1.055 gm/cm.sup.3 and 1.07 gm/cm.sup.3, a predefined surface tension in a range between 22 dynes/cm to 40 dynes/cm and a pH in the range of 1.77 and 2.05. In accordance with a feature of the invention, the novel method is provided for separating ABS and HIPS, two solid thermoplastics which have similar densities by selectively modifying the effective density of the HIPS using a binary solution with the appropriate properties, such as pH, density and surface tension, such as a solution of acetic acid and water or a quaternary solution having the appropriate density, surface tension, and pH.

  10. Processing of microencapsulated dyes for the visual inspection of fibre reinforced plastics

    SciTech Connect (OSTI)

    Hopmann, Ch., E-mail: kerschbaum@ikv.rwth-aachen.de; Kerschbaum, M., E-mail: kerschbaum@ikv.rwth-aachen.de; Ksters, K., E-mail: kerschbaum@ikv.rwth-aachen.de [Institute of Plastics Processing at RWTH Aachen University (IKV), Pontstrasse 49, 52064 Aachen (Germany)

    2014-05-15T23:59:59.000Z

    The evaluation of damages caused during processing, assembly or usage of fibre reinforced plastics is still a challenge. The use of inspection technology like ultrasonic scanning enables a detailed damage analysis but requires high investments and trained staff. Therefore, the visual inspection method is widely used. A drawback of this method is the difficult identification of barely visible damages, which can already be detrimental for the structural integrity. Therefore an approach is undertaken to integrate microencapsulated dyes into the laminates of fibre reinforced plastic parts to highlight damages on the surface. In case of a damage, the microcapsules rupture which leads to a release of the dye and a visible bruise on the part surface. To enable a wide application spectrum for this technology the microcapsules must be processable without rupturing with established manufacturing processes for fibre reinforced plastics. Therefore the incorporation of microcapsules in the filament winding, prepreg autoclave and resin transfer moulding (RTM) process is investigated. The results show that the use of a carrier medium is a feasible way to incorporate the microcapsules into the laminate for all investigated manufacturing processes. Impact testing of these laminates shows a bruise formation on the specimen surface which correlates with the impact energy level. This indicates a microcapsule survival during processing and shows the potential of this technology for damage detection and characterization.

  11. Light scattering apparatus and method for determining radiation exposure to plastic detectors

    DOE Patents [OSTI]

    Hermes, Robert E. (White Rock, NM)

    2002-01-01T23:59:59.000Z

    An improved system and method of analyzing cumulative radiation exposure registered as pits on track etch foils of radiation dosimeters. The light scattering apparatus and method of the present invention increases the speed of analysis while it also provides the ability to analyze exposure levels beyond that which may be properly measured with conventional techniques. Dosimeters often contain small plastic sheets that register accumulated damage when exposed to a radiation source. When the plastic sheet from the dosimeter is chemically etched, a track etch foil is produced wherein pits or holes are created in the plastic. The number of these pits, or holes, per unit of area (pit density) correspond to the amount of cumulative radiation exposure which is being optically measured by the apparatus. To measure the cumulative radiation exposure of a track etch foil a high intensity collimated beam is passed through foil such that the pits and holes within the track etch foil cause a portion of the impinging light beam to become scattered upon exit. The scattered light is focused with a lens, while the primary collimated light beam (unscattered light) is blocked. The scattered light is focused by the lens onto an optical detector capable of registering the optical power of the scattered light which corresponds to the cumulative radiation to which the track etch foil has been exposed.

  12. Test of a single module of the J-PET scanner based on plastic scintillators

    E-Print Network [OSTI]

    P. Moskal; Sz. Nied?wiecki; T. Bednarski; E. Czerwi?ski; ?. Kap?on; E. Kubicz; I. Moskal; M. Pawlik-Nied?wiecka; N. G. Sharma; M. Silarski; M. Zieli?ski; N. Zo?; P. Bia?as; A. Gajos; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; M. Molenda; M. Pa?ka; L. Raczy?ski; Z. Rudy; P. Salabura; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki

    2014-08-29T23:59:59.000Z

    Time of Flight Positron Emission Tomography scanner based on plastic scintillators is being developed at the Jagiellonian University by the J-PET collaboration. The main challenge of the conducted research lies in the elaboration of a method allowing application of plastic scintillators for the detection of low energy gamma quanta. In this article we report on tests of a single detection module built out from BC-420 plastic scintillator strip (with dimensions of 5x19x300mm^3) read out at two ends by Hamamatsu R5320 photomultipliers. The measurements were performed using collimated beam of annihilation quanta from the 68Ge isotope and applying the Serial Data Analyzer (Lecroy SDA6000A) which enabled sampling of signals with 50ps intervals. The time resolution of the prototype module was established to be better than 80ps (sigma) for a single level discrimination. The spatial resolution of the determination of the hit position along the strip was determined to be about 0.93cm (sigma) for the annihilation quanta. The fractional energy resolution for the energy E deposited by the annihilation quanta via the Compton scattering amounts to sigma(E)/E = 0.044/sqrt(E[MeV]) and corresponds to the sigma(E)/E of 7.5% at the Compton edge.

  13. Direct evidence of plastic events and dynamic heterogeneities in soft-glasses

    E-Print Network [OSTI]

    R. Benzi; M. Sbragaglia; P. Perlekar; M. Bernaschi; S. Succi; F. Toschi

    2014-02-18T23:59:59.000Z

    By using fluid-kinetic simulations of confined and concentrated emulsion droplets, we investigate the nature of space non-homogeneity in soft-glassy dynamics and provide quantitative measurements of the statistical features of plastic events in the proximity of the yield-stress threshold. Above the yield stress, our results show the existence of a finite stress correlation scale, which can be mapped directly onto the {\\it cooperativity scale}, recently introduced in the literature to capture non-local effects in the soft-glassy dynamics. In this regime, the emergence of a separate boundary (wall) rheology with higher fluidity than the bulk, is highlighted in terms of near-wall spontaneous segregation of plastic events. Near the yield stress, where the cooperative scale cannot be estimated with sufficient accuracy, the system shows a clear increase of the stress correlation scale, whereas plastic events exhibit intermittent clustering in time, with no preferential spatial location. A quantitative measurement of the space-time correlation associated with the motion of the interface of the droplets is key to spot the long-range amorphous order at the yield stress threshold.

  14. On the mechanisms of switching between two steady states of electroconductivity in plasticized transparent PVC films

    E-Print Network [OSTI]

    D. V. Vlasov; L. A. Apresian; V. I. Krystob; T. V. Vlasova

    2010-03-29T23:59:59.000Z

    The results of experimental researches of electroconductivity of PVC films, plasticized by patented modifier, at fields below the breakdown level are described. A possibility of management of the repeated transitions between two states with high and relatively low conductivity with conservation of reversibility is found out. A simple qualitative model of abnormal conductivity based on representation of polymer film as a sequence p-n of transitions is offered. For samples of plasticized PVC films with thickness 30-50 microns specific volume resistance of steady states was of an order of 10E4 Om*m \\times 10E6 Om*m, accordingly. A simple qualitative model describing abnormal character of conductivity of polymeric films is offered. The model considers the presence of known non-uniform plasticized polymer structure with discrete domains in which quasi-free moving of charges can occur. At imposing of an external field semi-condictive domains form sequence of p-n transitions which provides presence of two states of conductivity, in analogy with dinistors.

  15. High quality garbage: A neural network plastic sorter in hardware and software

    SciTech Connect (OSTI)

    Stanton, S.L.; Alam, M.K.; Hebner, G.A.

    1993-09-01T23:59:59.000Z

    In order to produce pure polymer streams from post-consumer waste plastics, a quick, accurate and relatively inexpensive method of sorting needs to be implemented. This technology has been demonstrated by using near-infrared spectroscopy reflectance data and neural network classification techniques. Backpropagation neural network routines have been developed to run real-time sortings in the lab, using a laboratory-grade spectrometer. In addition, a new reflectance spectrometer has been developed which is fast enough for commercial use. Initial training and test sets taken with the laboratory instrument show that a network is capable of learning 100% when classifying 5 groups of plastic (HDPE and LDPE combined), and up to 100% when classifying 6 groups. Initial data sets from the new instrument have classified plastics into all seven groups with varying degrees of success. One of the initial networks has been implemented in hardware, for high speed computations, and thus rapid classification. Two neural accelerator systems have been evaluated, one based on the Intel 8017ONX chip, and another on the AT&T ANNA chip.

  16. Predictors of plasticity in bituminous coals. Technical progress report No. 7

    SciTech Connect (OSTI)

    Lloyd, W.G.; Reasoner, J.W.; Hower, J.C.; Yates, L.P.; Clark, C.P.; Davis, E.; Fitzpatrick, A.; Reagles, C.L.; Whitt, J.M.

    1983-06-13T23:59:59.000Z

    The 40-coal database for the prediction of the plastic properties of hvb coals has been completed. Statistical analysis has been commenced. Most of the 37 ostensibly independent experimental variables and the 22 derived variables are shown to have little or no predictive power. Approximately a dozen independent variables appear to be systematically related to plasticity. Maximum fluidity can be determined in several ways from Gieseler plastometer data. Under both ASTM and isothermal conditions, maximum fluidity can be predicted using just two independent variables with a standard linear regression model of the form ln(maximum fluidity) = ..beta../sub 0/ + ..beta../sub 1/*V/sub 1/ + ..beta../sub 2/*V/sub 2/ with correlation coefficients greater than .85. The use of three or four independent variables permits predictions with R greater than .90. Pyrolysis gas chromatography has emerged as a powerful and relatively inexpensive new tool for the characterization of coals. In conjunction with studies of extraction, extract characteristics, and residue swelling, pyrolysis/GC affords insights into the basic factors determining the plastic behavior of coals.

  17. "Period","Annual Production Capacity",,"Monthly B100 Production"

    U.S. Energy Information Administration (EIA) Indexed Site

    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:SeadovCooperativeA2. World9, 2014 International PetroleumFuel Oil8Status ofU.S. Biodiesel

  18. Development of an uncoupled, viscoplastic constitutive model for cyclic plasticity of Hastelloy-X at high temperature

    E-Print Network [OSTI]

    Yuen, Shik Hung

    1983-01-01T23:59:59.000Z

    DEVELOPMENT OF AN UNCOUPLED, VISCOPLASTIC CONSTITUTIVE MODEL FOR CYCLIC PLASTICITY OF HASTELLOY-X AT HIGH TEMPERATURE A Thesis Submitted to the Graduate School of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE May 1983 Major Subject: Mechanical Engineering DEVELOPMENT OF AN UNCOUPLED, VISCOPLASTIC CONSTITUTIVE MODEL FOR CYCLIC PLASTICITY OF HASTELLOY-X AT HIGH TEMPERATURE A Thesis by SHIK HUNG YUEN Approved as to style and content by...

  19. A study of the plastic and elastic strain characteristics of an angular and well-graded sand experiencing cyclic loading

    E-Print Network [OSTI]

    Spencer, William Frank

    1957-01-01T23:59:59.000Z

    A ST%K OP THE PLASTIC AND ELASTIC STRAIN CHARACTERISTICS OF AN ANOULAR AND WELL ARAXSD SAND EXPERXENCIN6 CYCLIC LOADIN6 A Thesis By WILLIAM FRANK SPENCER, ZR. Subnitted to the Graduate School of the Agricultural and Mechanical College... of Texas partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1957 Major Sub/acti Civil Engineering A STOVES OF THE PLASTIC AND ELASTIC STRAIN CHARACTERISTICS OP AN ANOULAR AND WELL SRAXED SAND EXPERIENCING CYCLIC...

  20. Elastic-Plastic deformation studies in 4140 steel using the critically refracted longitudinal (Lcr)wave technique

    E-Print Network [OSTI]

    Tang, Wei

    2012-06-07T23:59:59.000Z

    ELASTIC-PLASTIC DEFORMATION STUDIES IN 4140 STEEL USING THE CRITICALLY REFRACTED LONGITUDINAL (Lethal WAVE TECHNIQUE A Thesis by WEI TANG Submitted to the Office of Graduate Studies of Texas AdtM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1996 Major Subject: Mechanical Engineering ELASTIC-PLASTIC DEFORMATION STUDIES IN 4140 STEEL USING THE CRITICALLY REFRACTED LONGITUDINAL (LCR) WAVE TECHNIQUE A Thesis by WEI TANG Submitted...

  1. Atomic-scale observation of parallel development of super elasticity and reversible plasticity in GaAs nanowires

    SciTech Connect (OSTI)

    Bao, Peite; Du, Sichao; Zheng, Rongkun, E-mail: rongkun.zheng@sydney.edu.au [School of Physics, The University of Sydney, Sydney, NSW 2006 (Australia); Wang, Yanbo; Liao, Xiaozhou, E-mail: xiaozhou.liao@sydney.edu.au [School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006 (Australia); Cui, Xiangyuan; Yen, Hung-Wei; Kong Yeoh, Wai; Ringer, Simon P. [School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006 (Australia); Australian Centre for Microscopy and Microanalysis, The University of Sydney, Sydney, NSW 2006 (Australia); Gao, Qiang; Hoe Tan, H.; Jagadish, Chennupati [Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia); Liu, Hongwei [Australian Centre for Microscopy and Microanalysis, The University of Sydney, Sydney, NSW 2006 (Australia); Zou, Jin [Materials Engineering and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD 4072 (Australia)

    2014-01-13T23:59:59.000Z

    We report the atomic-scale observation of parallel development of super elasticity and reversible dislocation-based plasticity from an early stage of bending deformation until fracture in GaAs nanowires. While this phenomenon is in sharp contrast to the textbook knowledge, it is expected to occur widely in nanostructures. This work indicates that the super recoverable deformation in nanomaterials is not simple elastic or reversible plastic deformation in nature, but the coupling of both.

  2. CO M PUTATIO NAL M ETHO D S F O R M ESO SCO PIC, INHO M O G ENEO US PLASTIC D EF O R M ATIO N

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    CO M PUTATIO NAL M ETHO D S F O R M ESO SCO PIC, INHO M O G ENEO US PLASTIC D EF O R M ATIO N Nasr of heterogeneuos plastic deformation in materials. The equations of motion of three-dimensional (3-D) inter- acting simulations of inhomogeneous plastic deformation, and associated applications in pattern-forming plastic

  3. Plasticity of Ductile Metallic Glasses: A Self-Organized Critical State B. A. Sun, H. B. Yu, W. Jiao, H. Y. Bai, D. Q. Zhao, and W. H. Wang*

    E-Print Network [OSTI]

    Wang, Wei Hua

    Plasticity of Ductile Metallic Glasses: A Self-Organized Critical State B. A. Sun, H. B. Yu, W the dynamic behavior of serrated flow and the plasticity in metallic glasses (MGs) and show that the plastic reproduce the experimental observations. Our studies have implications for understanding the precise plastic

  4. The potential environmental gains from recycling waste plastics: Simulation of transferring recycling and recovery technologies to Shenyang, China

    SciTech Connect (OSTI)

    Chen Xudong, E-mail: chen.xudong@nies.go.jp [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan); Xi Fengming [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Geng Yong, E-mail: gengyong@iae.ac.cn [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Fujita, Tsuyoshi [National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan)

    2011-01-15T23:59:59.000Z

    Research highlights: {yields} Urban symbiosis creates compatibility of industrial development and waste management. {yields} Mechanical technology leads to more CO{sub 2} emission reduction. {yields} Energy recovery technology leads to more fossil fuel saving. {yields} Clean energy makes recycling technologies cleaner. {yields} Demand management is crucial for realizing potential environmental gains of recycling. - Abstract: With the increasing attention on developing a low-carbon economy, it is necessary to seek appropriate ways on reducing greenhouse gas (GHG) emissions through innovative municipal solid waste management (MSWM), such as urban symbiosis. However, quantitative assessments on the environmental benefits of urban symbiosis, especially in developing countries, are limited because only a limited number of planned synergistic activities have been successful and it is difficult to acquire detailed inventory data from private companies. This paper modifies and applies a two-step simulation system and used it to assess the potential environmental benefits, including the reduction of GHG emissions and saving of fossil fuels, by employing various Japanese plastics recycling/energy-recovery technologies in Shenyang, China. The results showed that among various recycling/energy-recovery technologies, the mechanical waste plastics recycling technology, which produces concrete formwork boards (NF boards), has the greatest potential in terms of reducing GHG emissions (1.66 kg CO{sub 2}e/kg plastics), whereas the technology for the production of refuse plastic fuel (RPF) has the greatest potential on saving fossil fuel consumption (0.77 kgce/kg-plastics). Additional benefits can be gained by applying combined technologies that cascade the utilization of waste plastics. Moreover, the development of clean energy in conjunction with the promotion of new waste plastics recycling programs could contribute to additional reductions in GHG emissions and fossil fuel consumption.

  5. A model for predicting the evolution of damage in the plastic bonded explosive LX17

    E-Print Network [OSTI]

    Seidel, Gary Don

    2002-01-01T23:59:59.000Z

    . Of particular interest, Chan et al. (1997a, 1997b) observed grain boundary fracture in argillaceous salt. Along the same lines, Helms et al. (1999) employed the Tvergaard (1990) cohesive zone model in an implicit finite element code to predict grain boundary... implemented into a finite element code. The model, developed in part by Yoon and Allen (1999) and Allen and Searcy (2000, 2001a, 2001b), will use material parameters for the plastic bonded explosive LX17 in order to compare computational results...

  6. Application Of Elastic Perfectly Plastic Cyclic Analysis To Assessment Of Creep Strain

    SciTech Connect (OSTI)

    Carter, Peter [Stress Engineering Services Inc.] [Stress Engineering Services Inc.; Jetter, Robert I [Consultant] [Consultant; Sham, Sam [ORNL] [ORNL

    2012-01-01T23:59:59.000Z

    A cyclic elastic-perfectly plastic analysis method is proposed which provides a conservative estimate to cyclic creep strain accumulation within the ratchet boundary. The method is to check for ratcheting based on an elastic-perfectly material with a temperature-dependent pseudo yield stress defined by temperature, time and stress to give 1% creep strain. It does not require stress classification and is also applicable to a full range of temperature above and below the creep regime. This simplified method could be used as a rapid screening calculation, with full time-dependent creep analysis used if necessary.

  7. Multi-scale Modeling Approach to Acoustic Emission during Plastic Deformation

    E-Print Network [OSTI]

    Jagadish Kumar; G. Ananthakrishna

    2011-02-20T23:59:59.000Z

    We address the long standing problem of the origin of acoustic emission commonly observed during plastic deformation. We propose a frame-work to deal with the widely separated time scales of collective dislocation dynamics and elastic degrees of freedom to explain the nature of acoustic emission observed during the Portevin-Le Chatelier effect. The Ananthakrishna model is used as it explains most generic features of the phenomenon. Our results show that while acoustic emission bursts correlated with stress drops are well separated for the type C serrations, these bursts merge to form nearly continuous acoustic signals with overriding bursts for the propagating type A bands.

  8. Stress-induced patterns in ion-irradiated Silicon: a model based on anisotropic plastic flow

    E-Print Network [OSTI]

    Scott A. Norris

    2012-07-24T23:59:59.000Z

    We present a model for the effect of stress on thin amorphous films that develop atop ion-irradiated silicon, based on the mechanism of ion-induced anisotropic plastic flow. Using only parameters directly measured or known to high accuracy, the model exhibits remarkably good agreement with the wavelengths of experimentally-observed patterns, and agrees qualitatively with limited data on ripple propagation speed. The predictions of the model are discussed in the context of other mechanisms recently theorized to explain the wavelengths, including extensive comparison with an alternate model of stress.

  9. A preliminary systems design study of plastic sabots for small arms

    E-Print Network [OSTI]

    Whitt, Daniel Truett

    1971-01-01T23:59:59.000Z

    Gun Enthusiasts Page 12 Market Dimensions, Market Pererration, and Sales Income for the First Five Years Beginning in 1972 14 Pro Forma for the First Five Years 23 Forces Acting on the Bullet and the Sabot Which Cause Change in 27 Selected...: Dr. Charles A. Rodenberger This st udy is the presentation of a systems engineering approa . ~he development of a new business developing $5, 600, 000 annual gro s sales witnu. '' " vears based on the invention of plastic sabots for small arms. A...

  10. Non-destructive testing of carbon reinforced plastics by means of phase retrieval

    E-Print Network [OSTI]

    Agour, Mostafa; Kopylow, Christoph v; Bergmann, Ralf B

    2012-01-01T23:59:59.000Z

    In this work, the SLM-based phase retrieval system will be used to inspect carbon reinforced plastics samples (CFRP) under applying a thermal load. For this purpose, the system is used to capture a sequence of 8 spatially separated recording planes, where the distance between subsequent planes equals 2 mm. For detecting the hidden failures two sets of intensity observations are recorded. The first set for the initial state and the second set is captured after applying the load. To recover the phase information associated with the two states, the captured intensities have been subjected to an iterative algorithm based on the method of generalized projection.

  11. Plastic-lined valves are virtually trouble-free in caustic, acid pipelines

    SciTech Connect (OSTI)

    Not Available

    1983-02-01T23:59:59.000Z

    Chevron renovated the naphthenic acid plant, part of the Pascagoula, Mississippi Refinery of Chevron U.S.A. Inc., in mid-1979. They installed plastic-lined valves in the caustic and acid water piping systems. The valves combine the excellent sealing characteristics of a plug valve with the minimal rotary contact surface and low pressure drop of a butterfly valve. The valve has a molded-in-place PTFE liner resistant to abrasives and corrosives at temperatures of 450/sup 0/F, and is rated for pressures from full vacuum to 150 psi.

  12. Manufacturing Energy and Carbon Footprint - Sector: Plastics (NAICS 326), January 2014 (MECS 2010)

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

    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 Home Page on Delicious RankCombustion | Department of Energy Low-TemperatureEnergyAll ManufacturingFood andGlassPlastics and

  13. Feasibility study for a demonstration plant for liquefaction and coprocessing of waste plastics and tires

    SciTech Connect (OSTI)

    Huffman, G.P.; Shah, N. [Univ. of Kentucky, Lexington, KY (United States); Shelley, M. [Auburn Univ., AL (United States)] [and others

    1998-04-01T23:59:59.000Z

    The results of a feasibility study for a demonstration plant for the liquefaction of waste polymers and the coprocessing of waste polymers with coal are presented. The study was carried out by a committee of participants from five universities, the US DOE Federal Energy Technology Center, and Burns & Roe Corporation. The study included an assessment of current recycling practices, a review of pertinent research, and a survey of feedstock availability. A conceptual design for a demonstration plant was developed and a preliminary economic analysis for various feedstock mixes was carried out. The base case for feedstock scenarios was chosen to be 200 tons per day of waste plastic and 100 tons per day of waste tires. For this base case, the return on investment (ROI) was found to range from 8% to 16% as tipping fees for waste plastic and tires increased over a range comparable to that existing in the US. A number of additional feedstock scenarios that were both more and less profitable were also considered and are briefly discussed.

  14. Performance characteristics of the Atlas 60 kV, 60 kJ plastic capacitors

    SciTech Connect (OSTI)

    Reass, W.; Bennet, G.; Bowman, D.; Lopez, E.; Monroe, M.; Parsons, W.

    1997-12-01T23:59:59.000Z

    This paper provides the performance data of Atlas plastic capacitors as supplied by Maxwell Technologies and Aerovox Corporation. The fiberglass cases at 13 inches high by 29 inches wide and 28 inches in depth with a 2 inch by 18 inch bushing on each end. Two styles of the 33.5uF capacitors have been evaluated for Atlas use, a conventional paper-foil and a self-healing metalized-paper and plastic dielectric design. A test program to capacitor failure, is being used to evaluate capacitor lifetime at full voltage (60 kV) and a nominal 15% reversal. With the Atlas parameters, peak currents of {approximately} 340 kA are realized. In anticipation of faults, capacitors are capable, specified, and tested for 700 kA performance. Accurate methods are also utilized to determine capacitor inductance, less than 20 nH. The results of the various capacitor testing programs will be presented in addition to future directives for their R and D efforts.

  15. Quenching Factor for Low Energy Nuclear Recoils in a Plastic Scintillator

    E-Print Network [OSTI]

    L. Reichhart; D. Yu. Akimov; H. M. Araujo; E. J. Barnes; V. A. Belov; A. A. Burenkov; V. Chepel; A. Currie; L. DeViveiros; B. Edwards; V. Francis; C. Ghag; A. Hollingsworth; M. Horn; G. E. Kalmus; A. S. Kobyakin; A. G. Kovalenko; V. N. Lebedenko; A. Lindote; M. I. Lopes; R. Luscher; P. Majewski; A. St J. Murphy; F. Neves; S. M. Paling; J. Pinto da Cunha; R. Preece; J. J. Quenby; P. R. Scovell; C. Silva; V. N. Solovov; N. J. T. Smith; P. F. Smith; V. N. Stekhanov; T. J. Sumner; C. Thorne; R. J. Walker

    2011-11-09T23:59:59.000Z

    Plastic scintillators are widely used in industry, medicine and scientific research, including nuclear and particle physics. Although one of their most common applications is in neutron detection, experimental data on their response to low-energy nuclear recoils are scarce. Here, the relative scintillation efficiency for neutron-induced nuclear recoils in a polystyrene-based plastic scintillator (UPS-923A) is presented, exploring recoil energies between 125 keV and 850 keV. Monte Carlo simulations, incorporating light collection efficiency and energy resolution effects, are used to generate neutron scattering spectra which are matched to observed distributions of scintillation signals to parameterise the energy-dependent quenching factor. At energies above 300 keV the dependence is reasonably described using the semi-empirical formulation of Birks and a kB factor of (0.014+/-0.002) g/MeVcm^2 has been determined. Below that energy the measured quenching factor falls more steeply than predicted by the Birks formalism.

  16. Deformation-Driven Diffusion and Plastic Flow in Two-Dimensional Amorphous Granular Pillars

    E-Print Network [OSTI]

    Wenbin Li; Jennifer M. Rieser; Andrea J. Liu; Douglas J. Durian; Ju Li

    2015-02-04T23:59:59.000Z

    We report a combined experimental and simulation study of deformation-induced diffusion in compacted two-dimensional amorphous granular pillars, in which thermal fluctuations play negligible role. The pillars, consisting of bidisperse cylindrical acetal plastic particles standing upright on a substrate, are deformed uniaxially and quasistatically by a rigid bar moving at a constant speed. The plastic flow and particle rearrangements in the pillars are characterized by computing the best-fit affine transformation strain and non-affine displacement associated with each particle between two stages of deformation. The non-affine displacement exhibits exponential crossover from ballistic to diffusive behavior with respect to the cumulative deviatoric strain, indicating that in athermal granular packings, the cumulative deviatoric strain plays the role of time in thermal systems and drives effective particle diffusion. We further study the size-dependent deformation of the granular pillars by simulation, and find that different-sized pillars follow self-similar shape evolution during deformation. In addition, the yield stress of the pillars increases linearly with pillar size. Formation of transient shear lines in the pillars during deformation becomes more evident as pillar size increases. The width of these elementary shear bands is about twice the diameter of a particle, and does not vary with pillar size.

  17. Observations of a dynamical-to-kinematic diffraction transition in plastically deformed polycrystalline intermetallic YCu

    SciTech Connect (OSTI)

    Williams, Scott H. [Ames Laboratory; Brown, Donald W. [Los Alamos National Laboratory; Clausen, Bjorn [Los Alamos National Laboratory; Russell, Alan [Ames Laboratory; Gschneidner Jr., Karl A. [Ames Laboratory

    2014-03-01T23:59:59.000Z

    Unlike most intermetallic compounds, polycrystalline YCu, a B2 (CsCl-type) intermetallic, is ductile at room temperature. The mechanisms for this behavior are not fully understood. In situ neutron diffraction was used to investigate whether a stress-induced phase transformation or twinning contribute to the ductility; however, neither mechanism was found to be active in YCu. Surprisingly, this study revealed that the intensities of the diffraction peaks increased after plastic deformation. It is thought that annealing the samples created nearly perfect crystallinity, and subsequent deformation reduced this high degree of lattice coherency, resulting in a modified mosaic structure that decreased or eliminated the extinction effect. Analysis of changes in diffraction peak intensity showed a region of primary plasticity that exhibits significant changes in diffraction behavior. Fully annealed samples initially contain diffracting volumes large enough to follow the dynamical theory of diffraction. When loaded beyond the yield point, dislocation motion disrupts the lattice perfection, and the diffracting volume is reduced to the point that diffraction follows the kinematic theory of diffraction. Since the sample preparation and deformation mechanisms present in this study are common in numerous material systems, this dynamical to kinematic diffraction transition should also be considered in other diffraction experiments. These measurements also suggest the possibility of a new method of investigating structural characteristics. (C) 2014 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

  18. Design and Implementation of BCM Rule Based on Spike-Timing Dependent Plasticity

    E-Print Network [OSTI]

    Azghadi, Mostafa Rahimi; Iannella, Nicolangelo; Abbott, Derek

    2012-01-01T23:59:59.000Z

    The Bienenstock-Cooper-Munro (BCM) and Spike Timing-Dependent Plasticity (STDP) rules are two experimentally verified form of synaptic plasticity where the alteration of synaptic weight depends upon the rate and the timing of pre- and post-synaptic firing of action potentials, respectively. Previous studies have reported that under specific conditions, i.e. when a random train of Poissonian distributed spikes are used as inputs, and weight changes occur according to STDP, it has been shown that the BCM rule is an emergent property. Here, the applied STDP rule can be either classical pair-based STDP rule, or the more powerful triplet-based STDP rule. In this paper, we demonstrate the use of two distinct VLSI circuit implementations of STDP to examine whether BCM learning is an emergent property of STDP. These circuits are stimulated with random Poissonian spike trains. The first circuit implements the classical pair-based STDP, while the second circuit realizes a previously described triplet-based STDP rule. T...

  19. Micropillar compression technique applied to micron-scale mudstone elasto-plastic deformation.

    SciTech Connect (OSTI)

    Michael, Joseph Richard; Chidsey, Thomas (Utah Geological Survey, Salt Lake City, UT); Heath, Jason E.; Dewers, Thomas A.; Boyce, Brad Lee; Buchheit, Thomas Edward

    2010-12-01T23:59:59.000Z

    Mudstone mechanical testing is often limited by poor core recovery and sample size, preservation and preparation issues, which can lead to sampling bias, damage, and time-dependent effects. A micropillar compression technique, originally developed by Uchic et al. 2004, here is applied to elasto-plastic deformation of small volumes of mudstone, in the range of cubic microns. This study examines behavior of the Gothic shale, the basal unit of the Ismay zone of the Pennsylvanian Paradox Formation and potential shale gas play in southeastern Utah, USA. Precision manufacture of micropillars 5 microns in diameter and 10 microns in length are prepared using an ion-milling method. Characterization of samples is carried out using: dual focused ion - scanning electron beam imaging of nano-scaled pores and distribution of matrix clay and quartz, as well as pore-filling organics; laser scanning confocal (LSCM) 3D imaging of natural fractures; and gas permeability, among other techniques. Compression testing of micropillars under load control is performed using two different nanoindenter techniques. Deformation of 0.5 cm in diameter by 1 cm in length cores is carried out and visualized by a microscope loading stage and laser scanning confocal microscopy. Axisymmetric multistage compression testing and multi-stress path testing is carried out using 2.54 cm plugs. Discussion of results addresses size of representative elementary volumes applicable to continuum-scale mudstone deformation, anisotropy, and size-scale plasticity effects. Other issues include fabrication-induced damage, alignment, and influence of substrate.

  20. Health hazard evaluation report HETA 79-034-1440, Intex Plastics, Corinth, Mississippi

    SciTech Connect (OSTI)

    Salisbury, S.

    1984-03-01T23:59:59.000Z

    In response to a request from the president of the United Rubber Workers, Local 759, an investigation was begun into possible hazardous working conditions at the Hatco Plastics Division, Currently known as Intex Plastics, Corinth, Mississippi. The request indicated that several production and maintenance employees at that site had been disabled due to chemical poisoining and related illnesses. A medical survey was begun at the facility in March of 1979. Fifty employees participated by completing a questionnaire. A high prevalence of eye, nose, and throat irritation was found along with shortness of breath, cough, and skin rash among workers assigned to the Calender, Color, and Laminating Departments. Air sampling was performed in several departments. Except for methyl-ethyl-ketone (MEK), the levels of substances detected were quite low. The department with the highest exposure to airborne contaminants included the Print Service with 36 to 299 parts per million (ppm) MEK, laminating at 74 to 105ppm MEK, printing at 15 to 113ppm MEK, color at 15 to 24ppm MEK, premix at 0.3 to 6.8mg/cu m total dust, and calender at 0.1 to 0.6mg/cu m total dust.