Two-zone elastic-plastic single shock waves in solids

By decoupling time and length scales in moving window molecular dynamics shock-wave simulations, a new regime of shock-wave propagation is uncovered characterized by a two-zone elastic-plastic shock-wave structure consisting of a leading elastic front followed by a plastic front, both moving with th...

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Bibliographic Details
Published in:Physical review letters 2011-09, Vol.107 (13), p.135502-135502, Article 135502
Main Authors: Zhakhovsky, Vasily V, Budzevich, Mikalai M, Inogamov, Nail A, Oleynik, Ivan I, White, Carter T
Format: Article
Language:English
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Summary:By decoupling time and length scales in moving window molecular dynamics shock-wave simulations, a new regime of shock-wave propagation is uncovered characterized by a two-zone elastic-plastic shock-wave structure consisting of a leading elastic front followed by a plastic front, both moving with the same average speed and having a fixed net thickness that can extend to microns. The material in the elastic zone is in a metastable state that supports a pressure that can substantially exceed the critical pressure characteristic of the onset of the well-known split-elastic-plastic, two-wave propagation. The two-zone elastic-plastic wave is a general phenomenon observed in simulations of a broad class of crystalline materials and is within the reach of current experimental techniques.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.135502