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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