【作者】 张庆明； 谈庆明； 张德良； 郑哲敏；

【Author】 Zhang Qingming Tan Qingming Zhang Deliang Cheng Che-min (Institute of Mechanics, Chineae Academy of Sciences, Beijing 100080, China)

【机构】 中国科学院力学研究所；

【摘要】 对超高速冲击铝双层板的熔化效应进行了实验研究和数值模拟,用扫描电镜观察后板的弹坑发现:当弹丸碰撞速度超过5km/s时,后板出现熔坑;随着弹丸碰撞速度的增加,后板熔坑数目亦随之增加,碎片云对后板的破坏明显减弱。数值模拟表明,击波加热和塑性功加热是熔化的两种机制,有关熔化主要特征的数值模拟结果与实验结果基本吻合。更多还原

【Abstract】 In this paper, melting effects of aluminum dual-sheet structure in hypervelocity impact are studied experimentally and numerically. With the help of SEM, melted craters are observed on the backup plate when projectile velocity is larger than 5km/s. As projectile velocity increases, there are more melted craters on the backup, and perforation failure of the backup is concurrently mitigated. Numerical simulations show that, there are two kinds of melting mechanisms, i.e., the shock heating and the plastic work heating. The numerical results of the main characteristics of melting agree with the experimental results.更多还原