两种不同强塑性薄钢板抗弹性能的试验和数值模拟

 利用51B式7.62mm手枪弹对不同强度和塑性的薄钢板进行枪击试验，采用ANSYS/LS-DYNA软件对试验过程进行数值模拟，对试验和数值模拟过程的钢板破坏形貌、背凸高度、残余弹丸长度等宏观形貌进行比较。结合抗弹过程中弹丸和钢板消耗的能量，分析了强度和塑性对钢板抗弹性能的影响。结果表明：尽管两种钢板的抗拉强度和断后伸长率差异较大，但其抗51B式7.62mm手枪弹性能相当。试验和数值模拟结果吻合较好，模拟方法能够正确地反映弹丸冲击靶板过程。因较高强度钢板使弹丸变形消耗的能量大于较低强度钢板，塑性较好钢板本身变形消耗的能量大于较低塑性钢板，从而解释了两种钢板抗弹性能相当的试验结果。

Experiment and Numerical Simulation on Ballistic Performance of Two Thin Steel Plates With Different Strength and Ductility

51B-type 7.62 mm pistol bullets were fired at thin steel plates with different strength and ductility.And the numerical simulation for the experiments was carried on by ANSYS/LS-DYNA too.The macro-appearance in the process of testing and numerical simulation were compared,such as the impact craters,bulge height and residual projectile size.At last,combined with the energy absorption of the steel plate and the bullet,the influence of the strength and ductility on ballistic performance was analyzed.The results show that: two tested steel plates almost have the same ballistic performance against the 51B-type 7.62 mm pistol bullets,although the very different tensile strength and elongation they have.The numerical simulation result is consistent with the experiment,and it can reflect the process of the bullets impact target rightly.To the higher strength steel plate,energy absorption by making the projectile deformation is greater than the lower strength one,and to the higher ductility steel plate,energy absorption though its own deformation is larger than the lower ductility one.Thus,the result of two tested steel plates almost have the same ballistic performance is explained.