钨球斜侵彻钛合金靶试验及数值模拟研究

Experimental and numerical simulation study of tungsten ball oblique penetration through titanium alloy target

研究钨合金破片对钛合金靶(TC4)的弹道极限(V_(50))影响规律,对战斗部毁伤元威力评估具有重要意义。通过弹道冲击试验研究了着靶角度对∅6 mm,∅8 mm93W钨球侵彻5 mm厚TC4钛合金的弹道极限(V_(50))的影响规律,基于试验结果与数值模拟结果的一致性,扩展分析了5种典型尺寸(∅5~∅9 mm)钨球在0°~75°着角时,侵彻钛合金靶板V_(50)的影响规律。结果发现,随着钨球尺寸的增加,V_(50)逐渐减小,且V_(50)对着靶角度越逐渐不敏感,即V_(50)波动区间逐渐变小;随着着靶角度的增大,钨球穿靶V_(50)在小着角下(0°~45°)增长平缓;大着角下(45°~75°)的极限穿透速度变化率近似指数增长,且增加速率随着钨球尺寸的减小更加明显;相同弹道极限下,破片正、斜侵彻TC4钛合金靶的极限穿透厚度变化趋势基本一致,但斜侵彻下破片对TC4靶板的等效极限穿透厚度明显大于相同V_(50)下正侵彻TC4靶板的极限穿透厚度。研究结论可为杀爆战斗部威力设计提供参考依据。

The study of the influence of tungsten alloy fragments on the ballistic limit(V_(50))of titanium alloy target(TC4)is of great significance for the power evaluation of warhead damage elements.The ballistic impact test is carried out to study the effect of impact angle on the ballistic limit(V_(50))of 6 mm,8 mm 93W tungsten ball penetrating 5 mm thick TC4 titanium alloy.Based on the agreement between the experimental results and the numerical simulation results,the effects of five typical sizes of tungsten balls on the penetration of titanium alloy target V_(50) at an angle of 0°~75°are extended and analyzed.The results show that with the increase of the tungsten ball size,the V_(50) decreases gradually,and the V_(50) is less sensitive to the target angle,that is,the V_(50) fluctuation range becomes smaller;With the increase of the target angle,the V_(50) of the tungsten ball through the target increases slowly at a small impact angle(0°~45°),and the change rate of the ultimate penetration velocity at a large impact angle(45°~75°)increases exponentially,and the increasing rate becomes more obvious with the decrease of the tungsten ball size.Under the same ballistic limit,the variation trend of the ultimate penetration thickness of fragments into TC4 titanium alloy targets is basically the same,but the equivalent limit penetration thickness of fragments into TC4 targets under oblique penetration is obviously larger than that of TC4 targets with the same V_(50).The research conclusions can provide a reference basis for the power design of explosion-killing warheads.