High Speed Impact Effects of EFP Against Armor Targets
LI Chuan-zeng1, 2; Wang Shu-shan1; Rong Zhu3
1.State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology, Beijing 100081, China;2. China North Industries Group Corporation NO.5424 Factory, Beijing 110049;3. China North Industries Group Corporation NO.524 Factory, Ji Lin Ji Lin City 132021
摘 要：爆炸成型弹丸(Explosively Formed Projectiles，简称EFP)垂直高速冲击603装甲靶板实验，呈现了靶板入口卷边花瓣状破坏、出口具有拉伸断裂特征的外翻花瓣形穿孔、入口直径明显大于出口直径等宏观的冲击现象。为了从机理上研究EFP对装甲靶板的高速冲击效应，利用ANSYS/LS-DYNA动力学仿真软件，对整个冲击过程进行了数值模拟，再现了EFP形成、开坑、稳定侵彻、尾翼侵彻和冲塞贯穿的物理过程，模拟结果与实验现象吻合较好，并从原理上分析了实验中各宏观现象产生的原因。研究结果不但认识了EFP冲击装甲靶板的机理，也可为增强装甲防护能力和优化EFP设计提供理论参考，具有重要的现实意义和较高的工程应用价值。
Abstract：Abstract: Experiment of EFP impact 603 armor targets with a high speed, showing the macro-phenomenon as follows: curling petal-shaped damage of target entrance, valgus petal-shaped damage with tensile fracture characteristics of target exit, entrance diameter is larger than exit diameter and so on. In order to study the mechanism of high speed impact effects, using ANSYS/LS-DYNA to simulate the whole impacting process, which reappears the physical process from EFP formation, punching, quasi-steady penetration, empennage penetration to pass through. Simulation results are in good agreement with experimental phenomena. The reasons why these macro-phenomenons happened are analyzed in principle. Research results not only understand the mechanism of EFP impact armor targets, but also provide theoretical reference to improve armor protection capability and optimize design methods of EFP, which is very important and valuable in engineering.
2011, Vol. 30 
