陶瓷/金属复合靶板侵彻问题的数值模拟

利用大型非线性有限元程序LS—DYNA，对陶瓷／金属复合靶板的侵彻问题进行数值模拟，研究了陶瓷面板中锥形破坏区的形成过程．金属背板的弯曲及撕裂过程和弹体的墩粗变形及弹头消蚀过程．给出了背板背面中点和弹体尾部的位置坐标随时间的变化曲线，并将模拟结果与理论模型分析结果和实验结果进行了对比，发现三者吻合很好．文中还分析了不同陶瓷面板和金属背板厚度比对复合靶板抗弹能力的影响，结果表明，要提高靶板的抗弹能力，一定存在一个最佳的厚度比，这一结论对复合靶板设计具有参考价值．

Numerical Simulation of Penetration of Composite Ceramic/Metal Armours

The numerical simulation of the penetration of composite ceramic/metal armours was carried out by using a large-scale nonlinear Finite Element code LS-DYNA. Some processes in the penetration, such as the forming process of the conoid-shaped zone of the fragmented ceramic, the bending and cracking processes of the metal backup plate, the mushrooming of the projectile and the vanishing process of the projectile head, were then investigated. Furthermore, the curves of the coordinates of the projectile-armor interface and the rear end of the projectile varied with time were given. The simulated results are compared with the results of a theoretical analysis as well as the experimental results. It is concluded that the three kinds of results match fairly well with each other. The effect of the ratio of the ceramic thickness to the metal backup plate thickness on the impaction-resistance ability of the composite armour is also analyzed, with the result indicating that there is an optimum ratio for the impaction-resistance ability. This conclusion is valuable for the design of composite ceramic/metal armours.