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Title: Atomistic-scale evaluation of the fracture toughness of silicates.

Abstract

Abstract not provided.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, Livermore, CA
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1431613
Report Number(s):
SAND2017-3291C
652095
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the American Chemical Society held April 1-6, 2017 in San Francisco, California.
Country of Publication:
United States
Language:
English

Citation Formats

Rimsza, Jessica, Jones, Reese E., and Criscenti, Louise. Atomistic-scale evaluation of the fracture toughness of silicates.. United States: N. p., 2017. Web.
Rimsza, Jessica, Jones, Reese E., & Criscenti, Louise. Atomistic-scale evaluation of the fracture toughness of silicates.. United States.
Rimsza, Jessica, Jones, Reese E., and Criscenti, Louise. Wed . "Atomistic-scale evaluation of the fracture toughness of silicates.". United States. doi:. https://www.osti.gov/servlets/purl/1431613.
@article{osti_1431613,
title = {Atomistic-scale evaluation of the fracture toughness of silicates.},
author = {Rimsza, Jessica and Jones, Reese E. and Criscenti, Louise},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}

Conference:
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  • Abstract not provided.
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  • A new evaluation procedure has been proposed in this paper to determine the required fracture toughness as a function of the required deformability of structural components. This procedure is characterized by the equivalent CTOD (Crack Tip Opening Displacement) concept which provides the compatible Weibull stress between the 3-point bend specimen and the structural component. The present procedure was useful for the estimation of the fracture performance of notched wide plates from 3-point bend CTOD results, while the analysis based on the conventional CTOD concept gave very conservative estimation. The strength mis-match effect on the required toughness of the weld metalmore » to meet the design requirement can be quantified by the equivalent CTOD concept. It was demonstrated by the numerical simulation using the welded joint of a Grade 550 pipeline steel that the required bend CTOD {delta}{sub 3P}{sup R} was much smaller than the required CTOD {delta}{sub WP}{sup R} for the wide plate. The required weld metal CTOD {delta}{sub WP}{sup R} for the wide plate increased with decreasing the yield strength mis-match ratio {sigma}{sub Y}{sup W}/{sigma}{sub Y}{sup B} between the base and weld metals. By contrast, the required bend CTOD {sigma}{sub 3P}{sup R} of the weld metal was not always sensitive to the mis-match condition in welds.« less
  • One of the greatest uncertainties in a fitness-for-service evaluation is the fracture toughness input for the material of interest. Deterministic analyses with lower-bound estimates of toughness can be overly conservative. An alternative approach is to perform a probabilistic fitness-for-service analysis that considers the statistical distribution of toughness. This article presents a methodology for determining fracture toughness distributions for ferritic steels in the ductile-brittle transition region. A major advantage of this approach is that the toughness distribution for a given material can be inferred from Charpy data.