材料对双层药型罩形成串联EFP的影响

Effects of materials on formation of double-layer shaped charges into tandem EFP

为研究材料对串联爆炸成型弹丸(EFP)形成的影响,在理论分析的基础上,提出双层药型罩形成分离EFP的判据。利用数值仿真软件AUTODYN,研究串联EFP形成的力学现象。进行双层药型罩EFP形成的实验研究,得到串联EFP形成过程的X光照片。试验结果与仿真结果比较吻合。从试验和仿真结果看出,分离EFP的形成,不仅依赖于内、外罩材料的选择,还与药型罩的结构设计密切相关。

In order to study the effects of liner materials on the formation of Double-Layer Shaped Charge （DLSC） into tandem EFP （explosively formed projectile）, the criterions which decide whether DLSC can form tandem EFP were proposed based on theory analysis. Utilizing two-dimensional finite element dynamic code AUTODYN, the numerical simulations on the mechanical phenomenon of DLSC forming into tandem EFP were carried out. X-ray pictures were obtained after experiments on DLSC.Comparisons between experimental results and numerical simulation results have good agreement. It can be concluded from the results that the materials properties and configurations of both liners are crucial to the formation of tandem EFP.