钨合金长杆弹侵彻陶瓷层合板的数值模拟

用自编计算程序给出了长杆弹侵彻陶瓷层合板的数值模拟。其中层合板的面板和背板均为装甲钢，中间为3层氧化铝陶瓷。装甲钢和长杆弹材料的本构关系采用Johnson-Cook模型，将Mohr-Coulomb盖帽模型与Bodner-Partom模型相结合来描述氧化铝陶瓷的失效和流动过程。为了提高有限元的计算精度,使用了一致质量矩阵迭代法，破坏网格的处理采用了网格侵蚀法。数值模拟的最终穿深计算结果与实验一致。

Numerical simulation for penetration of ceramic composite plate by long-rod projectile of tungsten alloy

The numerical simulation result for the penetration of ceramic composite plate by long-rod projectile of tungsten alloy was presented. The front and back of the composite plate is made of armor steel and in the middle is ceramic. The Johnson-Cook constitutive equation was adopted to describe the deformations of the armor steel and the projectile. The Mohr-Coulomb cap model was combined with the Bodner-Partom constitutive equations to describe the comminuted strength and the flow stress of the ceramic. The iterative method using consistent mass matrix was used to improve the computation accuracy and the interface eroding technique was introduced to deal with the failure of the meshes. The computational results of the penetration depth are in agreement with the experiments.