Yi Jianya, Wang Zhijun, Yin Jianping
College of Mechatronics Engineering, North University of China, Taiyuan 030051, China.
Polymers (Basel). 2022 May 19;14(10):2068. doi: 10.3390/polym14102068.
Polymer materials have important applications in the4 terminal effect and damage by shaped-charge warheads. However, the low strength of pure PTFE materials reduces the penetrability of the expansive jet from these warheads, hindering its application. This study improves the strength of pure PTFE material by adding Cu powder to the shaped-charge liner. Three types of PTFE/Cu composites with different densities are prepared. The effect of increasing the density on the performance of an expansive jet is studied by a dynamic mechanical property experiment, microscopic analysis, numerical simulation, and a penetration experiment. The results show that the toughness and impact strength of the PTFE/Cu composites improve when 18-50.5% Cu is added. The strength of the composite increases linearly with the increase in Cu content. Numerical simulations and X-ray pulse experiments reveal that the addition of Cu powder enhances the cohesiveness of the head of the expansive jet. The jet head becomes more cohesive as the Cu content is increased. However, the length and diameter of the jet become smaller. The jet can create a deeper hole in the steel target and increase damage as more Cu is added to the liner.
聚合物材料在聚能装药战斗部的四终端效应及毁伤方面有重要应用。然而，纯聚四氟乙烯材料强度较低，降低了此类战斗部扩张射流的穿透能力，阻碍了其应用。本研究通过在聚能装药药型罩中添加铜粉来提高纯聚四氟乙烯材料的强度。制备了三种不同密度的聚四氟乙烯/铜复合材料。通过动态力学性能实验、微观分析、数值模拟和侵彻实验研究了密度增加对扩张射流性能的影响。结果表明，当添加18% - 50.5%的铜时，聚四氟乙烯/铜复合材料的韧性和冲击强度得到改善。复合材料的强度随铜含量的增加呈线性增加。数值模拟和X射线脉冲实验表明，添加铜粉增强了扩张射流头部的凝聚性。随着铜含量的增加，射流头部的凝聚性增强。然而，射流的长度和直径变小。随着更多的铜添加到药型罩中，射流能在钢靶上打出更深的孔并增加毁伤效果。
