药型罩材料对JPC成型的影响

Effect of Liner Material on Jetting Projectile Charge Formation

运用LS-DYNA模拟软件研究了药型罩材料对聚能杆式侵彻体(JPC)成型的影响。通过对铝、铁、铜、钽、钨JPC的统计分析,得出材料密度和延伸率对JPC头部速度、长径比等参数的影响规律。结果表明,随着从铝到钨材料密度以及延伸率的减小,JPC头部速度降低69%,长径比降低75%,鉴于JPC的这两个参数,铜、钽是作为JPC成型的较好材料,而铜最佳,铝易断裂、易气化,铁和钨不能够得到充分拉伸,均不适合JPC的成型。对铜药型罩进行了试验验证,试验结果与模拟结果较吻合。

The influence of liner material on Jetting Projectile Charge（JPC） formation is researched by LS-DYNA software.Through analyzing and disposing,the formation shape and parameters of JPC formed by five liner materials：aluminum,iron,copper,tantalum and tungsten and the law that the formation parameters of JPC,like velocity and length-diameter ratio,influenced by the density and tensility of liner material are obtained.The result shows that following the reduce of density and tensility of liner material which is from aluminum to tungsten,the JPC head velocity falls 69%,and JPC length-diameter ratio falls 75%,the two parameters of JPC show that,copper and tantalum are better meterials for JPC formation than others,but copper is the best of all.Aluminum tends to rupture and boil away,iron and tungsten cannot be pulled fully,they all are not fit for JPC formation.Finally,an experiment with copper liner is done,and the results are well in agreement with the simulation results.