锥头弹丸撞击下固支金属厚靶的侵彻与穿透的理论研究

研究了在不同速度的刚性锥头弹丸撞击下固支金属厚靶的侵彻和穿透性能。假定靶板的变形是局部化的,且冲击能量仅通过侵彻过程吸收,同时假定弹体在侵彻过程中表面所受靶体的平均压力是由基于空穴膨胀理论的靶体材料弹塑性变形所引起的静态阻力以及速度效应引起的动阻力两部分组成,认为侵彻过程中靶体对弹体的静阻力要进行自由表面效应修正,而且动阻力是瞬时侵彻速度的函数。获得了锥头弹丸在侵彻和贯穿过程中的弹道极限速度和残余速度的公式。将理论预测与实验结果进行比较,发现两者符合得很好。

Perforation of Fully-Clamped Thick Metallic Plates Struck Normally by Conical-Nosed Projectiles

Simple analytical equations are given to predict the perforation of fully-clamped thick metallic plates struck normally by rigid conical-nosed projectiles over a wide range of velocities based on the assumption that the deformation is localized and that the impact energy is dissipated only by penetration. It is further assumed that the mean pressure offered by the target materials to resist the projectiles consists of two partsia quasi-static part due to the elastic-plastic deformation of the laminate materials and a dynamic part due to penetration velocity. Equations are obtained for the residual velocity and ballistic limit. It transpires that the present model predictions are in good agreement with available experimental data for thick metallic plates struck normally by conical-nosed projectiles.