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首页> 外文期刊>Bulletin of the American Physical Society >APS -APS March Meeting 2017 - Event - Shock Waves and Defects in Energetic Materials, a Match Made in MD Heaven.
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APS -APS March Meeting 2017 - Event - Shock Waves and Defects in Energetic Materials, a Match Made in MD Heaven.

机译：APS -APS 2017年3月会议-活动-冲击波和高能材料中的缺陷，这是MD Heaven制造的。

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Shock wave interactions with defects, such as pores, are known to play a key role in the chemical initiation of energetic materials. In this talk the shock response of Hexanitrostilbene (HNS) is studied through large scale reactive molecular dynamics (RMD) simulations. These RMD simulations provide a unique opportunity to elucidate mechanisms of viscoplastic pore collapse which are often neglected in larger scale hydrodynamic models. A discussion of the macroscopic effects of this viscoplastic material response, such as its role in hot spot formation, will be provided. Through this work we have been able to map a transition from purely viscoplastic to fluid-like pore collapse that is a function of shock strength, pore size and material strength. In addition, these findings are important reference data for the validation of future multi-scale modeling efforts of the shock response of heterogeneous materials.
机译：冲击波与缺陷（例如孔）的相互作用在高能材料的化学引发中起关键作用。在本次演讲中，通过大规模反应分子动力学（RMD）模拟研究了六硝基二苯乙烯（HNS）的冲击响应。这些RMD模拟提供了一个独特的机会来阐明粘胶塑性孔隙塌陷的机制，而这种机制通常在较大规模的流体动力学模型中常常被忽略。将讨论这种粘塑性材料响应的宏观影响，例如其在热点形成中的作用。通过这项工作，我们已经能够绘制出从纯粘塑性到流体状孔隙塌陷的过渡过程，这是冲击强度，孔隙大小和材料强度的函数。此外，这些发现为验证异质材料的冲击响应的未来多尺度建模工作提供了重要的参考数据。

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