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APS » Journals » Phys. Rev. Lett. » Volume 71 » Issue 25
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Phys. Rev. Lett. 71, 4182–4185 (1993)

Crystal instabilities at finite strain

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Jinghan Wang and Sidney Yip
Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

S. R. Phillpot and Dieter Wolf
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439

Received 30 August 1993; published in the issue dated 20 December 1993

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.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.71.4182
DOI:
10.1103/PhysRevLett.71.4182
PACS:
62.20.Dc, 61.50.Lt, 81.40.Jj
 
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