硼化物基超高温复合陶瓷超高速撞击作用下破坏模式研究

Research on Damage Model of Boride-base Ultrahigh Temperature Composite Ceramics under Hypervelocity Impact

随着各国航天实验和航天器的增加,太空中存在微小碎片垃圾越来越多,对航天器正常运行有着极大的危害。研究弹丸超高速撞击硼化物基复合陶瓷产生的碎片云特性,采用非线性动力学分析软件AUTODYN,利用光滑质点动力学方法对圆柱形弹丸超高速撞击硼化物基超高温复合陶瓷单层板形成的碎片云进行数值模拟,分析相同质量不同速度弹丸撞击靶板的破坏模式,不同质量相同速度弹丸撞击靶板的破坏模式。结果表明在不同速度和质量弹丸撞击靶板的破坏模式中,穿孔半径变化规律为穿孔半径随着弹丸速度和质量的增大而增大。根据不同质量弹丸超高速撞击板靶的穿孔半径变化规律,得到弹丸撞击相同厚度靶板的击穿速度临界值。该结果可为航天器超高速撞击风险评估和防护设计提供了参考。

With the increase of space experiments and spacecraft in various countries,there are more and more micro-debris in space,which has great harm to the normal operation of spacecraft.Aiming at investigating the characteristics of debris cloud produced by hypervelocity impact of projectile on boride based composite ceramics,the nonlinear dynamics analysis software AUTODYN is used to simulate the debris cloud formed by hypervelocity impact of cylindrical projectile on boride based composite ceramics single-layer plate with smooth particle dynamics method and then analyze damage modes of target plate with the same mass and different velocity projectile and with different mass and same velocity.The results show that the change rule of perforation radius is that the perforation radius increases with the increase of projectile velocity and mass.The critical value of the breakdown velocity of the projectile impacting the target with different thickness is obtained.The results provide a reference for spacecraft hypervelocity impact risk assessment and protection design.