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Title: Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity

Abstract

Results of recent large-scale molecular dynamics simulations of dislocation-mediated solid plasticity are compared with predictions of the statistical thermodynamic theory of these phenomena. These computational and theoretical analyses are in substantial agreement with each other in both their descriptions of strain-rate-dependent steady plastic flows and of transient stress peaks associated with initially small densities of dislocations. Lastly, the comparisons between the numerical simulations and basic theory reveal inconsistencies in some conventional phenomenological descriptions of solid plasticity.

Authors:
 [1]
+ Show Author Affiliations
  1. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1468005
Alternate Identifier(s):
OSTI ID: 1467955
Grant/Contract Number:  
AC05-00OR22725; AC05-00OR-22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Langer, James S. Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity. United States: N. p., 2018. Web. doi:10.1103/PhysRevE.98.023006.
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Langer, James S. Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity. United States. doi:10.1103/PhysRevE.98.023006.
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Langer, James S. Wed . "Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity". United States. doi:10.1103/PhysRevE.98.023006. https://www.osti.gov/servlets/purl/1468005.
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@article{osti_1468005,
title = {Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity},
author = {Langer, James S.},
abstractNote = {Results of recent large-scale molecular dynamics simulations of dislocation-mediated solid plasticity are compared with predictions of the statistical thermodynamic theory of these phenomena. These computational and theoretical analyses are in substantial agreement with each other in both their descriptions of strain-rate-dependent steady plastic flows and of transient stress peaks associated with initially small densities of dislocations. Lastly, the comparisons between the numerical simulations and basic theory reveal inconsistencies in some conventional phenomenological descriptions of solid plasticity.},
doi = {10.1103/PhysRevE.98.023006},
journal = {Physical Review E},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {8}
}
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Journal Article:
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Publisher's Version of Record
DOI:  10.1103/PhysRevE.98.023006
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