【摘要】 使用近场动力学常规态理论对于弹体高速侵彻陶瓷/金属复合靶板进行了数值仿真,并讨论了态理论中的适用性问题。分别采用弹性和J2率无关弹塑性本构模型进行了陶瓷/金属靶板的PD建模,模拟了刚性弹体高速侵彻陶瓷复合靶板的过程,获得了弹体的速度时程曲线、靶板的破坏模式及靶板飞溅的情况,并将仿真结果与有限元结果及实验对比。采用不同的影响函数及近场作用范围计算得到靶板的裂纹扩展模式。结果表明通过采用合适的本构模型PD方法可以有效准确地模拟复合靶板受弹体高速侵彻的全过程,存在较优的影响函数与近场作用范围使得计算结果准确。更多还原

【Abstract】 State-based peridynamics were used to simulate the process of projectile penetrating ceramic/metal composite targets at high speed. The behavior of ceramic panels and metal target plates was modeled by using elastic and J2 rate-independent elastic-plastic constitutive models. Then penetration process of ceramic composite target plate impacted at high-speed by a rigid projectile was simulated, and the impact velocity time history curve, the failure mode, and splash of the ceramic plate of the penetration process were obtained. And the crack propagation of the target plate was calculated by using different influence functions and horizons. The simulation results show that PD can accurately simulate the high-speed impact by using an appropriate constitutive model and there are better influence functions and horizons to make the result accurate.更多还原