不同弹头形式的易碎弹冲击航空有机玻璃的数值分析

利用霍普金森杆(SHPB)实验方法,针对由金属与硫混合而成的易碎弹复合材料及某航空有机玻璃材料,测得了不同应变率下两种材料的动态力学参数。根据实验数据拟合给出易碎弹与航空有机玻璃材料的Johnson-cook强度模型参数,并对参数进行数值仿真验证。在此基础上,利用AUTODYN-3D有限元程序,对具有不同弹头形式的易碎弹冲击航空有机玻璃全过程进行数值模拟,通过对比子弹的破碎效果及对航空有机玻璃的毁伤效果,分析总结了相关规律。结果表明:该复合材料具有较好的易碎效果;空尖易碎弹的破碎效果优于普通易碎弹,并且对航空有机玻璃的毁伤效果逊色于普通易碎弹,更加符合实际应用。

Numerical analysis on fragile projectile with different warheads impacting against aviation organic glass

Based on hopkinson bar (SHPB) experiments, for some aviation organic glass materials and fragile projectile composite materials by the mixture of metal and sulfur, getting two materials dynamic mechanics parameters under different strain rate. According to the experimental data fitting, getting the Johnson - cook intensity model materi-als parameters of fragile projectile and aviation organic glass, And verifying the parameters with the use of numerical simulation. On this basis, on the use of AUTODYN - 3d finite element program, the whole process of the fragile projec-tile with different warhead forms impacting aviation organic glass is numerically simulated. Through comparing crush-ing effect of the projectile and the damage effect of aviation organic glass, analyzing and summarizing some laws. The results show that: the composite material has good effect of fragile; the crushing effect of empty pointed fragile projectile is better than that of ordinary fragile projectile, and the damage effect of aviation organic glass by the former is less than that by the latter, the empty pointed fragile projectile is more in line with the actual application than the other.