超高速撞击下钛基复合材料动力学行为研究

Dynamic Behavior of Titanium Matrix Composites under Hypervelocity Impact

基于已有的铝合金超高速撞击实验研究结果,采用动力分析软件,对铝球撞击铝板进行了数值模拟,验证了数值模拟结果的可靠性,进而对铝防护屏以及与铝防护屏质量相同的钛基复合材料(TMC)防护屏进行了5.52、7.00、和8.00km/s速度下的超高速撞击模拟,分别对直径为5.02mm的铝球以及质量等同于铝球的钛基复合材料球做了3种速度下撞击铝屏和钛基复合材料防护屏的数值模拟。通过数值模拟研究可以看出,随着撞击速度的增加,钛基复合材料防护屏的防护效果优于铝防护屏;速度不变,钛基复合材料防护屏防护钛基复合材料球撞击的效果好,铝防护屏防护铝球撞击的效果好。通过超高速撞击模型分析可知,钛基复合材料防护屏的防护效果优于铝防护屏。

Based on experimental results,numerical simulations were performed to study the hypervelocity impact of aluminum balls against aluminum targets,verifying the reliability of the numerical model.Hypervelocity impact simulations under three different velocities of 5.52,7.00 and 8.00km/s against aluminum target and titanium matrix composite target with the same mass of the aluminum target were simulated.The process of aluminum balls with a diameter of 5.02 mm and titanium matrix composite balls with the same mass of the aluminum balls impacting aluminum shields and titanium matrix composite shields were analyzed by using a dynamic analysis program under the above three velocities,respectively.It can be found that the protective effect of the titanium matrix composite shields is more efficient than that of the aluminum shields when increasing the impact velocities.When the velocity is constant,the protective effect of titanium matrix composite shield against titanium matrix composite ball is good and the protective effect of aluminum shield against aluminum ball is good.With a theoretical analysis on impact process,it can be concluded that protective effect of the titanium matrix composite shields is more efficient than that of the aluminum shields.