Li Hongda, Duan Hui, Zhang Zhili, Zheng Yuanfeng
Missile Engineering Academy, Rocket Force Engineering University, Xi'an 710025, China.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel). 2023 Mar 29;16(7):2715. doi: 10.3390/ma16072715.
To study the penetration and cratering effect of reactive material composite jets, a series of experiments are carried out for the shaped charge (SC) with different composite liners damaging steel targets. The inner layer of composite liners is metal and the outer one is a polytetrafluoroethylene/aluminum (PTFE/Al) reactive material. Copper (Cu), titanium (Ti) and Al inner liners are used in this paper. The reactive material liner is composed of 73.5 wt.% PTFE and 26.5 wt.% Al powder through mass-matched ratios. Reactive material composite liners are prepared through machining, cold pressing and a sintering process. The SC mainly consists of a case, a composite liner, high-energy explosive and an initiator. The steel target is steel 45#, with a thickness of 66 mm. A standoff of 1.0 CD (charge diameter) is selected to conduct the penetration experiments. The experimental results show that when the inner layer of the composite liner is composed of Ti and Al, the hole diameters on the steel target formed by the reactive material composite jet are significantly larger than that of the inner Cu liner. By introducing the initiation delay time () and detonation-like reaction model of PTFE/Al reactive materials, an integrated numerical simulation algorithm of the penetration and detonation-like effects of reactive material composite jets is realized. Numerical simulations demonstrate that the initial penetration holes on the steel targets are enlarged under the detonation-like effects of PTFE/Al reactive materials, and the simulated perforation sizes are in good agreement with the experimental results.
为研究反应材料复合射流的侵彻和炸坑效应，对带有不同复合药型罩的聚能装药（SC）毁伤钢靶开展了一系列实验。复合药型罩的内层为金属，外层为聚四氟乙烯/铝（PTFE/Al）反应材料。本文采用了铜（Cu）、钛（Ti）和铝内层药型罩。反应材料药型罩由质量配比为73.5 wt.%的PTFE和26.5 wt.%的铝粉组成。反应材料复合药型罩通过机械加工、冷压和烧结工艺制备。聚能装药主要由壳体、复合药型罩、高能炸药和起爆器组成。钢靶为45#钢，厚度为66 mm。选择1.0倍装药直径（CD）的 standoff进行侵彻实验。实验结果表明，当复合药型罩内层由Ti和Al组成时，反应材料复合射流在钢靶上形成的孔径明显大于内层为Cu药型罩时的孔径。通过引入PTFE/Al反应材料的起爆延迟时间（）和类爆轰反应模型，实现了反应材料复合射流侵彻和类爆轰效应的一体化数值模拟算法。数值模拟表明，在PTFE/Al反应材料的类爆轰效应作用下，钢靶上的初始侵彻孔被扩大，模拟的穿孔尺寸与实验结果吻合良好。
