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Title: Finite Temperature Quasicontinuum: Molecular Dynamics without all the Atoms

Journal Article · · Physical Review Letters

Using a combination of statistical mechanics and finite-element interpolation, the authors develop a coarse-grained (CG) alternative to molecular dynamics (MD) for crystalline solids at constant temperature. The new approach is significantly more efficient than MD and generalizes earlier work on the quasi-continuum method. The method is validated by recovering equilibrium properties of single crystal Ni as a function of temperature. CG dynamical simulations of nanoindentation reveal a strong dependence on temperature of the critical stress to nucleate dislocations under the indenter.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
15016785
Report Number(s):
UCRL-JRNL-209481; PRLTAO; TRN: US200516%%107
Journal Information:
Physical Review Letters, Vol. 95, Issue 6; ISSN 0031-9007
Country of Publication:
United States
Language:
English

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