Crystal instabilities at finite strain
Jinghan WangDepartment of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139Sidney YipDepartment of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139Simon R. PhillpotDepartment of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139D. WolfDepartment of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
1993en
ABI
Abstract
It is demonstrated that stability criteria derived using elastic stiffness coefficients which govern stress-strain relations at finite deformation give quantitative predictions of crystal instability, as observed in direct molecular dynamics simulations. With the aid of such analysis we show that instabilities can be triggered in succession; as a consequence, the limit of metastability in the superheating of a defect-free crystal can be predicted.
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