TY - JOUR
T1 - Elucidation of the dynamics for hot-spot initiation at nonuniform interfaces of highly shocked materials
AU - An, Qi
AU - Zybin, Sergey V.
AU - Goddard, William A.
AU - Jaramillo-Botero, Andres
AU - Blanco, Mario
AU - Luo, Sheng Nian
PY - 2011/12/7
Y1 - 2011/12/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84855306509&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.220101
DO - 10.1103/PhysRevB.84.220101
M3 - Article
AN - SCOPUS:84855306509
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 220101
ER -