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.

Additional Metadata
Persistent URL dx.doi.org/10.1103/PhysRevLett.95.060202
Journal Physical Review Letters
Citation
Dupuy, L.M. (L. M.), Tadmor, E.B. (E. B.), Miller, R, & Phillips, R. (R.). (2005). Finite-temperature quasicontinuum: Molecular dynamics without all the atoms. Physical Review Letters, 95(6). doi:10.1103/PhysRevLett.95.060202