PTFE基活性材料毁伤元冲击靶板毁伤效应及影响因素

Damage Effects and Influencing Factors of Target Plate Impacted by PTFE-Based Reactive Material Damage Element

为探究PTFE基活性材料毁伤元对靶板的冲击毁伤效应,通过开展弹道冲击三层间隔靶板实验,研究了冲击速度、靶板结构和添加填料对聚四氟乙烯/铝(PTFE/Al)活性材料毁伤效应的影响,揭示了弹丸的冲击反应行为和靶板的侵彻毁伤过程.结果表明:提高弹丸冲击速度,靶板扩孔模式由花瓣型撕裂转变为冲塞型穿孔,动能侵彻和爆炸冲击的耦合作用可对靶板造成更大程度的结构损伤.相同冲击速度下弹丸撞击钢板产生的冲击压力高于铝板,而撞击铝板时小峰值冲击诱发的初始活化有助于提升毁伤元的能量释放率.PTFE基活性材料的毁伤效能取决于冲击动能、反应热量、能量释放率和气体生成率的共同作用,W、Ni、Mg、MnO_(2)、TiH_(2)和ZrH_(2)的添加可以显著增强PTFE/Al的反应强度和毁伤效应.

To explore the impact damage effects of PTFE-based reactive material damage element on target plate,the impact speed,target plate structure and fillers on the damage effect of PTFE/Al reactive material were studied by conducting ballistic impact three-layer spacer target plate experiment,and the impact reaction behavior of projectile and the penetration damage process of target plate were revealed.The results show that increasing projectile impact speed,the boring damage mode of target plate can change from petal-shaped tearing into plug-type perforating,resulting in a greater structural damage to the target plate due to the coupling effect of kinetic energy penetration and explosive impact.At the same impact speed of the projectile,the impact pressure produced in the steel plate is higher than that produced in the aluminum plate,revealing the initial activation induced with small peak impact in the aluminum target plate is conducive to improving the energy release rate of the damage element.Synoptically,the damage effectiveness of PTFE-based reactive materials depends on the combined action of the impact kinetic energy,reaction heat,energy release rate,and gas generation rate,and the addition of W,Ni,Mg,MnO_(2),TiH_(2) and ZrH_(2) elements can also significantly enhance the reaction intensity and damage effect of PTFE/Al.