装甲材料特性对刚性弹丸边缘冲击的影响

Influence of Armor Material Properties to the Edge Impact of Rigid Projectile

刚性弹丸冲击金属板边缘,受到板边缘的不对称作用力,将会失去稳定性,发生偏转与旋转,由此产生的偏航角会大大降低弹丸的侵彻能力。为进一步研究其作用机理,研究建立了一个描述刚性弹丸冲击塑性易变形靶板动态过程的六自由度解析模型,该模型可根据靶板的厚度以及板的材料特性来计算推测弹体冲击金属板或其他塑性较好材质板后产生的偏航角。应用AUTODYN软件进行了数值模拟,并进行了14.5 mm穿甲燃烧弹以1000 m/s的速度冲击铝板试验,将模拟结果、试验结果与解析模型推测结果进行对比分析,验证解析模型的正确性。

A rigid projectile impacting the edge of metallic plate losses its stability and is deflected and rotated due to the asymmetric forces of plate edge, and the resulting large yaw obtained this way greatly reduced the penetration capability of projectile. For further study of its mechanism, a analytical model of six degrees of freedom, describing the dynamics of a rigid projectile impacting a ductile deformable target. The equations of the model are solved to predict the yaw angle of a projectile impacting metallic plate or any targets made of ductile materials according to the plate thickness and material properties.The relevant numerical simulation was performed using AUTODYN software and the test of 14.5 mm armor- piercing incendiary(14.5AP) impact aluminum plate was done at the velocity of 1000 m/s.The comparison of results for simulations, experiments and analytical model are used to verify the correctness of the analytical model.