炸药冲击响应的二维细观离散元模拟

Two-dimensional mesoscale discrete element simulation of shock response of explosives

1.
Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 用离散元法在颗粒尺度模拟了塑料粘接炸药的冲击响应。炸药的细观结构基于Voronoi拼图建成。以含孔洞和不含孔洞的炸药模型为例，说明细观结构对热点的形成和分布有重要影响。在这些算例中，粘塑性变形是温度局域化的主要原因，而摩擦和体积粘性等机制可以忽略。
- 爆炸力学 /
- 冲击响应 /
- 离散元方法 /
- 塑料粘接炸药 /
- 热点
Abstract: Shock response of plastic bonded explosives were simulated at the grain scale using the discrete element method. The mesoscopic structures of explosives were created based on the Voronoi tessellation. Through simulations on explosives with and without a pore inside, the important impact of mesoscopic structure on the formation and distribution of hot spots was demonstrated. In these sample calculations, it is found that the temperature localization is mainly due to visco-plastic deformation whereas the mechanisms of friction and bulk viscosity can be ignored.
- mechanics of explosion /
- shock response /
- discrete element method /
- plastic bonded explosives /
- hot spots

点击查看大图