Zhang Hao, Wang Haifu, Yu Qingbo, Zheng Yuanfeng, Lu Guancheng, Ge Chao
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel). 2021 Mar 5;14(5):1229. doi: 10.3390/ma14051229.
Perforation behavior of 3 mm/3 mm double-spaced aluminum plates by PTFE/Al/W (Polytetrafluoroethylene/Aluminum/Tungsten) reactive projectiles with densities ranging from 2.27 to 7.80 g/cm was studied experimentally and theoretically. Ballistic experiments show that the failure mode of the front plate transforms from petalling failure to plugging failure as projectile density increases. Theoretical prediction of the critical velocities for the reactive projectiles perforating the double-spaced plates is proposed, which is consistent with the experimental results and well represents the perforation performance of the projectiles. Dimensionless formulae for estimating the perforation diameter and deflection height of the front plates are obtained through dimensional analysis, indicating material density and strength are dominant factors to determine the perforation size. High-speed video sequences of the perforation process demonstrate that high-density reactive projectiles make greater damage to the rear plates because of the generation of projectile debris streams. Specifically, the maximum spray angle of the debris streams and the crater number in the debris concentration area of the rear plate both increase with the projectile density and initial velocity.
对密度范围为2.27至7.80 g/cm的聚四氟乙烯/铝/钨（PTFE/Al/W）反应性射弹对3毫米/3毫米双间隔铝板的穿孔行为进行了实验和理论研究。弹道实验表明，随着射弹密度的增加，前板的失效模式从花瓣状失效转变为堵塞失效。提出了反应性射弹穿透双间隔板的临界速度的理论预测，该预测与实验结果一致，并很好地反映了射弹的穿孔性能。通过量纲分析获得了估计前板穿孔直径和偏转高度的无量纲公式，表明材料密度和强度是决定穿孔尺寸的主要因素。穿孔过程的高速视频序列表明，高密度反应性射弹由于产生射弹碎片流而对后板造成更大的破坏。具体而言，碎片流的最大喷射角度和后板碎片集中区域的弹坑数量均随射弹密度和初始速度的增加而增加。
