首页> 外文会议>International Detonation Symposium >Grain scale simulations of pore collapse and chemical reaction in shock-loaded β-HMX crystal
【24h】

Grain scale simulations of pore collapse and chemical reaction in shock-loaded β-HMX crystal

机译:抗冲击β-HMX晶体孔隙塌陷和化学反应的粒度模拟

获取原文

摘要

The formation of hot spots is critical to the shock wave initiation of heteroge- neous high explosive materials. Hot spots are formed, for example, when micron-sized pores contained within energetic crystals are collapsed under shock wave loading. In this work, a numerical model is used to simulate pore collapse and chemical reactions in shock- loaded β-HMX crystal. The model accounts for (i) anisotropic time-dependent mechanical responses of the crystalline phase, (ii) crystal melting due to localized deformation, and (iii) temperature-driven decomposition reactions. For a baseline set of model parameters, the simulations predict a modest extent of reaction over a nanosecond time scale. However, relatively small increases in the assumed viscosity of the liquid phase lead to significant increases in reactivity due to intensified dissipation in shear banding regions.
机译:热点的形成对于异质型高爆炸材料的冲击波启动至关重要。例如,当在电击波载荷下折叠有能量晶体中的微米尺寸的孔隙时,形成热点。在这项工作中,使用数值模型来模拟冲击β-HMX晶体中的孔隙塌陷和化学反应。该模型占(i)晶相的各向异性时间依赖性机械响应,(ii)由于局部变形而晶体熔化,(III)温度驱动的分解反应。对于基线的模型参数集,模拟预测纳秒时间尺度的反应的适度程度。然而,由于剪切带区域的增强耗散,液相的假定粘度的相对较小的增加导致反应性的显着增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号