战斗部侵彻过程中PBX装药动态损伤数值模拟  

Numerical simulation of dynamic damage of PBX charge during the warhead penetration process

作　　者：石啸海 戴开达[1] 陈鹏万[1] 崔云霄[1] SHI Xiaohai DAI Kaida CHEN Pengwan CUI Yunxiao(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《中国测试》2016年第10期138-142,共5页China Measurement & Test

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)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。To study the dynamic mechanical response and damage of PBX charge in the 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 PBX charge. Meanwhile, the overload, axial stress and Simultaneously, the effect of dynamic charge is discussed. The results show good effect to simulate the dynamic computing the damage evolution of damage degree were analyzed. damage of buffer layer, such as PMMA and PTFE, on the that 1）the user defined material model based on CCM has mechanical properties and damage of PBX charge; 2）the buffer layer can protect internal charge validly and improve mechanical environment of charge. 3）the PMMA is the best buffer material to

关 键 词：战斗部 PBX装药 动态损伤 内聚力裂纹模型 数值模拟 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]