Yi Jianya, Wang Zhijun, Yin Jianping, Zhang Zhimin
School of Mechatronic Engineering, North University of China, Taiyuan 030051, China.
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China.
Materials (Basel). 2019 Mar 4;12(5):744. doi: 10.3390/ma12050744.
An ideally shaped charge warhead is an effective weapon against armored targets. The use of the gathering energy effect generated by the explosion drives the liner to form a shaped charge jet, which can penetrate the armored target. Existing shaped charge warheads often use a metal liner. Herein, we discuss the characteristics of polymer liners. To study the characteristics of the expansive jet formed by the polymer liner, three polymer materials with different properties-polytetrafluoroethylene (PTFE), nylon (PA), and polycarbonate (PC)-were selected. Using the smooth particle hydrodynamics (SPH) method and the AUTODYN finite element software, the expansive jet formation by the polymer liners was simulated and verified by experimental data. The polymer jets of the different materials exhibit a certain degree of expansivity; however, due to differences in the material properties, the expansive diameter of the jet and the degree of head compaction differed. The expansive diameter of the PA jet was the smallest, and that of the PTFE jet was larger than that of the PA jet, but with a smaller compactness. The PC jet exhibited the largest expansive diameter and the highest degree of compactness.
理想形状的聚能装药战斗部是对抗装甲目标的有效武器。利用爆炸产生的聚能效应驱动药型罩形成聚能射流，从而能够穿透装甲目标。现有的聚能装药战斗部通常使用金属药型罩。在此，我们讨论聚合物药型罩的特性。为了研究聚合物药型罩形成的膨胀射流的特性，选择了三种具有不同性能的聚合物材料——聚四氟乙烯（PTFE）、尼龙（PA）和聚碳酸酯（PC）。使用光滑粒子流体动力学（SPH）方法和AUTODYN有限元软件，对聚合物药型罩形成膨胀射流的过程进行了模拟，并通过实验数据进行了验证。不同材料的聚合物射流表现出一定程度的膨胀性；然而，由于材料性能的差异，射流的膨胀直径和头部压实程度有所不同。PA射流的膨胀直径最小，PTFE射流的膨胀直径大于PA射流，但压实度较小。PC射流表现出最大的膨胀直径和最高的压实度。
