冲击作用下HMX晶体孔洞塌缩热点生成机制的细观数值模拟

傅华; 赵峰; 谭多望; 王文强; 尚海林

doi:10.11858/gywlxb.2011.01.002

冲击作用下HMX晶体孔洞塌缩热点生成机制的细观数值模拟

doi: 10.11858/gywlxb.2011.01.002

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳 621900

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通讯作者:
傅华

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出版历程
- 收稿日期: 2009-05-16
- 修回日期: 2009-12-30
- 刊出日期: 2011-02-15

Mesoscale Simulation of Cavity Collapse Hot Spot Mechanism in HMX under Shock Loading

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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Corresponding author: FU Hua

摘要

摘要: 热点的形成、点火以及成长过程是理解非均匀炸药冲击起爆的关键。采用离散元法，对冲击作用下含孔洞的HMX晶体进行了细观数值模拟。计算结果表明：在较低冲击作用下，孔洞边缘发生了较大的剪切变形，粘塑性功形成热点；而在较高冲击作用下，孔洞塌缩产生射流，汇聚流动，冲击下游炸药形成热点，并获得了孔洞塌缩和热点生成演化的细观过程。
- 离散元法 /
- 热点 /
- 孔洞塌缩 /
- 细观数值模拟
Abstract: The origin, ignition, growth of hot spot are the factors to understand shock initiation in heterogeneous explosive. The process of cavity collapse in HMX under shock loading was simulated using discrete element method. The results showed that the visco-plastic deformation formed hot spot mechanism and there was serious shear distortion around cavity under low impact. It was also found that the micro-jetting formed hot spot under high impact. The mesoscale process of hot spot formation and cavity collapse were gained.
- discrete element method /
- hot spot /
- cavity collapse /
- mesoscale simulation

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参考文献(16)

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