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

Journal Article · 01 August 2018 · Physical Review E

DOI: https://doi.org/10.1103/PhysRevE.98.023006 · OSTI ID:1468005

Langer, James S. ^[1]

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1. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC05-00OR22725; AC05-00OR-22725
• OSTI ID: 1468005
• Alternate ID(s): OSTI ID: 1467955
• Journal Information: Physical Review E, Vol. 98, Issue 2; ISSN 2470-0045
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English