Gr&uuml;neisen equation of state of warhead charge under impact loading

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (12) : 105-111.

Grüneisen equation of state of warhead charge under impact loading

CAI Xuanming1，ZHANG Wei2，XU Peng1，GAO Yubo1，FAN Zhiqiang1

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Abstract

Aiming at the application problem of PBX explosive in weapon warhead, the effects of plane positive shock wave to the state equation of PBX explosive were studied.Based on the planar shock wave equation and the Hugoniot curve, using symmetric collision experiments, the state equation of different densities of PBX explosive under different shock wave loading were studied through the relationship of the application of shock wave velocity and particle velocity.In the research results, the impact factors and sound velocity of different densities PBX explosive were obtained.The relevant parameters of the Gruneisen state equation were obtained, which provided an important basis for predicting the internal pressure, density and energy state of the PBX explosive in the face of the larger shock wave array.And the result reveals that the relationship between Gruneisen coefficient Γ and body strain ξ is highly linear.
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Key words

/ impact loading；Weapon warhead charge；particle velocity；shock wave

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CAI Xuanming1，ZHANG Wei2，XU Peng1，GAO Yubo1，FAN Zhiqiang1. Grüneisen equation of state of warhead charge under impact loading[J]. Journal of Vibration and Shock, 2019, 38(12): 105-111

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