Critical speed theoretical model for hemispherical long rod projectiles’ penetrating semi-infinite thick target at high velocity
LIU Chuang1, ZHANG Xianfeng1, HUANG Changqiang1,2,DING Li1,XU Chenyang1, DENG Jiajie1
1. School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，Jiangsu，China；
2. Aeronautics and Astronautics Engineering College，Air Force Engineering University，Xi’an 710038，Shanxi，China
Abstract：In order to destroy protected fortifications，researchers are putting more and more attention on hypervelocity penetration. With the increase of impact velocity, rigid penetration of the projectile will transfer to the deformation and hydrodynamic penetration. During this process, the depth of penetration (DOP) of long rod projectile (LRP) may change at a transition point form increase to decrease. Based on conservation laws of quality and momentum, theoretical equations were established to calculate the transition velocity between deformation and hydrodynamic penetration. Also the influence of the penetrator and target parameters on the transition velocity were analyzed after verifying the reliability of calculation model. The calculation results show that with the increasing of static yield strength, deformation length of the projectile is decreased, the transition velocity between deformation penetration and hydrodynamic penetration are decreased. Accordingly, projectile and target plastic wave velocity have significantly influences on the critical velocity.
刘闯 1,张先锋 1，黄长强 1，2，丁力 1，徐晨阳 1，邓佳杰 1 . 半球头长杆弹高速侵彻半无限厚靶临界速度理论模型[J]. 振动与冲击, 2019, 38(9): 8-14.
LIU Chuang1, ZHANG Xianfeng1, HUANG Changqiang1,2,DING Li1,XU Chenyang1, DENG Jiajie1. Critical speed theoretical model for hemispherical long rod projectiles’ penetrating semi-infinite thick target at high velocity. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(9): 8-14.
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