类钢密度活性材料弹丸撞击铝靶行为实验研究

Experimental Research on Behavior of Active Material Projectile with Steel-like Density Impacting Aluminum Target

采用弹道碰撞实验对类钢密度冷压成型和烧结硬化聚四氟乙烯/铝/钨系活性材料弹丸撞击铝靶行为进行了研究。基于圆柱形活性材料弹丸正碰撞不同厚度2A12硬铝靶的弹道极限速度、穿孔破坏模式及平均穿孔尺寸实验结果,结合THOR侵彻方程,得到活性材料弹丸正碰撞铝靶的弹道极限速度半经验关系,并分析铝靶厚度对活性材料弹丸相对于钢弹丸侵彻行为及性能的影响。从活性材料内部压力分布、靶板背面稀疏波卸载效应和活性材料激活响应点火时间等角度,分析和讨论了活性材料弹丸化学响应行为对侵彻性能的影响机理。分析结果表明,随着靶板厚度的增大,活性材料激活率和侵孔内爆燃压力随之提高,从而导致侵彻末端爆裂穿孔能力的显著增强。

The ballistic impact experiments are performed to investigate the penetration behavior of the pressed and sintered PTFE / Al / W active material projectile with steel-like density impacting an aluminum target. Based on the experimental results of ballistic limit velocity,perforated patterns and average hole sizes produced by the cylindrical active material projectiles normally impacting 2A12 aluminum plates with different thicknesses,a semi-empirical relationship between the ballistic limit velocity and aluminum plate thickness is developed by combining with the THOR penetration equation. The effect of aluminum plate thickness on penetration behavior and performance of active material projectile are analyzed. Moreover,for the combined considerations of the pressure distribution in the active material projectile,the rarefaction wave effect and the impact-initiated delay time,the influence of active material chemical response on the penetration performance is analyzed and discussed. The analysis shows that the initiation efficiency and the deflagration pressure inside penetration hole are increased with the increase in target thickness,resulting in the significantly improved perforation ability of active material projectile at the end of the penetration hole.