动能弹侵彻多层陶瓷靶板数值模拟研究

NUMERICAL SIMULATION OF KE PROJECTILE PENETRATION INTO MULTILAYERED CERAMICS

结合试验对钨合金长杆弹垂直侵彻多层陶瓷靶板进行了三维数值模拟,得出了侵彻的物理图像及各种参量的变化规律。模拟结果中,后置钢靶剩余穿深和陶瓷破碎锥形状与试验基本一致。对于多层陶瓷靶板,每一层都会有漏斗形的破碎锥出现,且这些破碎锥的形状基本一致。随着陶瓷层数的增多,弹体的速度和动能下降速率逐渐变小。比较了相同厚度的多层和单层陶瓷靶板的抗弹性能,结果表明两者的陶瓷破坏形式不同,多层靶板的抗弹性能要优于相同厚度的单层陶瓷靶板,且仅在一定厚度范围内这种优势才较为明显。

Three dimensional numerical simulation of W-alloy kinetic energy （KE） projectile penetration into multilayered ceramics was conducted combined with experimental investigations. The numerical results agree satisfactorily with experiments in depth-of-penetration （DOP） into the backup steel target and the fragment shape. Each layer of the ceramics has an infundibulate fragmentation with similar shape. The kinetic energy and velocity decreases with the increase in the ceramics layers. The resistant performances of multilayer and monolayer ceramic targets with the same thickness are compared. It is shown that their damage behaviors are different. The multilayer ceramic is better than the monolayer ones, but only in certain thickness range.