Three-dimensional discrete element simulation of hot spots in explosives under shock loading

SHANG  Hai-Lin; ZHAO  Feng; WANG  Wen-Qiang; FU  Hua

doi:10.11883/1001-1455(2010)02-0131-07

Volume 30 Issue 2

Nov. 2010

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SHANG Hai-Lin, ZHAO Feng, WANG Wen-Qiang, FU Hua. Three-dimensional discrete element simulation of hot spots in explosives under shock loading[J]. Explosion And Shock Waves, 2010, 30(2): 131-137. doi: 10.11883/1001-1455(2010)02-0131-07

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SHANG Hai-Lin, ZHAO Feng, WANG Wen-Qiang, FU Hua. Three-dimensional discrete element simulation of hot spots in explosives under shock loading[J]. Explosion And Shock Waves, 2010, 30(2): 131-137. doi: 10.11883/1001-1455(2010)02-0131-07

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Three-dimensional discrete element simulation of hot spots in explosives under shock loading

doi: 10.11883/1001-1455(2010)02-0131-07

Publish Date: 2010-03-25

Abstract

Abstract

Mesoscale responses of heterogeneous explosives under shock loading were investigated by using a three-dimensional discrete element method. Numerical simulations without chemical reaction were conducted to explore the hot spot mechanisms in plastic bonded explosives and explosives containing voids of different shape and different size. The simulation results indicate that for shocked PBX explosives hot spots mostly locate near the interface between HMX crystals and binder, the temperature rise of HMX crystals is lower than that of the binder, and the surrounding parts of HMX crystals have higher temperature rise than the inner parts. For explosives containing a void, temperature of hot spot induced by the collapse of a big void is higher than that induced by the collapse of a small void, and temperature of hot spot induced by the collapse of a spherical void is higher than that induced by the collapse of a cubic void.
- mechanics of explosion,
- hot spot,
- discrete element method,
- heterogeneous explosive,
- shock loading

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