Future Developments in Explosives and Energetics - 1st International Explosives Conference
Future Developments in Explosives and Energetics - 1st International Explosives Conference
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炸药和能量学的未来发展 - 第一届国际炸药会议
DOI：
10.1039/9781839162350-00220
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Falco S
中科院分区：
文献类型：
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作者：
Falco S
高能材料的建模通常在欧拉框架内进行，本质上非常适合模拟反应产物的流体行为和压力波在周围流体介质（例如空气或水）中的传播。然而，拉格朗日框架在再现材料未反应的机械响应方面变得更有吸引力，特别是当我们试图更好地捕捉受损爆炸物的响应时。本文介绍了历史变量反应性燃烧（HVRB）模型在拉格朗日显式软件LS-Dyna中的实现。HVRB反应速率参数进行了验证，对简单的ratestick测试之前，被用来模拟爆炸的半球形收费从位于半球的极点的点火点。数值结果直接比较高速视频从实验测试，说明合理的协议给出简单的HVRB制定。这为通过结合更复杂的反应性燃烧模型（例如损伤引发反应（DMGIR））来发展更深入的理解铺平了道路，该模型可以考虑爆炸物响应时机械诱导损伤的作用。
The modelling of energetic materials is usually performed within an Eulerian framework, inherently well suited to simulate fluid-like behaviour of the reaction products and the propagation of pressure waves in the surrounding fluid media (eg air or water). However, the Lagrangian framework becomes more attractive in the effort to reproduce the unreacted mechanical response of the material, especially as we move towards trying to capture better the response of damaged explosives. In this paper the implementation of the History Variable Reactive Burn (HVRB) model in the Lagrangian explicit software LS-Dyna is presented. The HVRB reaction rate parameters are verified against simple ratestick tests before being used to simulate the detonation of hemispherical charges from an ignition point located at the pole of the hemisphere. The numerical results are directly compared against high-speed video from the experimental tests, illustrating reasonable agreement given the simplicity of the HVRB formulation. This paves the way for developing deeper understanding by incorporating more complex reactive burn models, eg Damage Initiated Reaction (DMGIR), which can consider the role of mechanically induced damage upon the response of explosives.