Finite-temperature quasicontinuum: Molecular dynamics without all the atoms

L. M. Dupuy, E. B. Tadmor, R. E. Miller, R. Phillips

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

Using a combination of statistical mechanics and finite-element interpolation, we 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 quasicontinuum 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.

Original languageEnglish (US)
Article number060202
JournalPhysical review letters
Volume95
Issue number6
DOIs
StatePublished - Aug 5 2005
Externally publishedYes

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