Elucidation of the dynamics for hot-spot initiation at nonuniform interfaces of highly shocked materials
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Authors
An, Qi
Zybin, Sergey V.
Goddard III, William A.
Jaramillo-Botero, Andres
Blanco, Mario
Luo, Sheng-Nian
Issue Date
2011
Type
Article
Language
Keywords
Alternative Title
Abstract
The fundamental processes in shock-induced instabilities of materials remain obscure, particularly for detonation of energetic materials. We simulated these processes at the atomic scale on a realistic model of a polymer-bonded explosive (3,695,375 atoms/cell) and observed that a hot spot forms at the nonuniform interface, arising from shear relaxation that results in shear along the interface that leads to a large temperature increase that persists long after the shock front has passed the interface. For energetic materials this temperature increase is coupled to chemical reactions that lead to detonation. We show that decreasing the density of the binder eliminates the hot spot.
Description
Citation
Publisher
American Physical Society
License
In Copyright
Journal
Volume
Issue
PubMed ID
ISSN
1098-0121