高密度活性破片碰撞双层靶毁伤效应

Damage of double-spaced plates by reactive material fragment impact

采用弹道碰撞实验,对高密度冷压成型和烧结硬化PTFE/Al/W活性破片正碰撞双层间隔铝板毁伤效应问题进行研究。实验结果表明,在高速碰撞条件下,活性破片对前靶的作用主要体现为动能贯穿破坏,与前靶相比,后靶毁伤更为严重,表现为更大的穿孔尺寸和毁伤面积,并伴随有显著的隆起及裂纹等结构破坏。引入裂纹扩展理论,分析了碰撞速度及靶板厚度对活性破片动能侵彻和爆炸作用联合毁伤效应的影响,从机理上揭示了后靶结构毁伤行为和效应。

The ballistic impact experiments are conducted to investigate the damage of double-spaced aluminum plates impacted by the pressed and sintered PTFE/Al/W reactive material projectile. The experimental results show that a typical KE perforated hole on the front plate is produced by the reactive material projectile impact, whereas the dramatically structural damage with significant deflectiotis and cracks is found in the rear plate, with larger ruptured holes and damage areas, as compared with the front plate. Moreover, the influences of the impact velocity and the plate thickness on the damage of the rear plate are analyzed by using the crack growth theory. The structural damage mechanisms of the rear plate are discussed.