战斗部侵彻过程中PBX装药动态损伤数值模拟作者：石啸海 戴开达 陈鹏万来源：《中国测试》2016年第10期 摘 要：为研究战斗部侵彻过程中PBX装药的动态力学性能及损伤情况，进行缩比弹侵彻半无限大混凝土靶板的数值模拟。PBX装药采用内聚力裂纹模型，通过计算PBX装药的损伤演化过程，获得单元裂纹宽度等关键参数，并分析过载、轴向应力及损伤程度，同时计算分析有机玻璃、聚四氟乙烯等材料作为缓冲层对装药动态损伤的影响。结果表明：1挑山工教学实录）基于内聚力裂纹模型的PBX装药自定义材料模型能很好地模拟装药的动态力学性能及损伤；2）使用缓冲层可以有效地保护战斗部内部装药；3）有机玻璃作缓冲材料用于改善装药力学环境的效果更加明显。 白头 关键词：战斗部；PBX装药；动态损伤；内聚力裂纹模型；数值模拟
文献标志码：A 文章编号：1674-5124金山毒霸2006（2016质量对企业的重要性）10-0138-05
Abstract： To study the dynamic mechanical response and damage of PBX charge in t
he process of warhead penetration， the numerical simulation of scaled projectile penetrating into semi-infinite concrete target is used. The cohesive crack model （CCM） is used to simulate PBX charge. The key parameters， such as the width of crack， were obtained by computing the damage evolution of PBX charge. Meanwhile， the overload， axial stress and damage degree were analyzed. Simultaneously，离线 the effect of dynamic damage of buffer layer，zipa such as PMMA and PTFE， on the charge is discussed. The results show that 1）the user defined material model based on CCM has good effect to simulate the dynamic mechanical properties and damage of PBX charge； 2）the buffer layer can protect internal charge validly and 3）the PMMA is the best buffer material to improve mechanical environment of charge.
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