弹头形状与界面强度对侵彻过程的数值仿真

Numerical Simulation on Penetration of Projectiles with Different Nose Shapes and Interfacial Strength

研究B4C陶瓷复合防弹靶是轻质防护工程优化问题,传统应用陶瓷对变形和强度缺乏定性分析。为准确选复合板陶瓷种类,采用数值仿真对抗弹性能分析方法,对弹头形状、层间接触方式和层间界面强度对B4C陶瓷复合靶抗弹机制的影响进行数值分析。在LS-DYNA软件中用Lagrange算法进行仿真,结果表明,陶瓷复合靶板抗平头弹的穿透能力要优于圆头弹。层间采用不同的界面接触方式对结果有影响,提高靶板间界面强度可提高陶瓷复合靶抗弹性能,可以为实验设计提供参考。

B4 C ceramic composite targets is highlight in lightweight protective engineering, but these experiments are expensive, so studying its anti-penetration performance with numerical simulation method is very important. Two kinds of projectiles and several kinds of contact state B4C ceramic composite targets were designed. The influences of nose shapes of projectiles, contact style and interfacial strength on the ballistic mechanisms of the targets were simula- ted with the Lagrange algorithm of LS-DYNA. The simulation results show that, the blunt nosed projectiles were more difficult to perforate the ceramic composite targets than round nosed ones; various contact styles have certain effect on numerical simulation results; enhancing interfacial strength can improve the anti-penetration performance of ceramic composite targets. The simulation results can provide design reference for test models.