不同硬度刻槽壳体爆炸驱动形成破片特性研究

Study on Fragments Formation of Groove Shell With Different Hardness Under Explosively Loading

为了获得材料硬度对刻槽壳体爆炸驱动形成破片性能的影响规律,选取3种不同热处理硬度下的D60钢作为刻槽壳体材料,通过破片速度测试与沙箱回收破片试验,研究了D60钢刻槽壳体形成破片的速度及质量分布特性,并利用AUTODYN-3D软件结合Stochastic随机失效模型,仿真研究了D60钢刻槽壳体爆炸驱动下形成破片作用过程及破片速度、质量变化规律。结果表明:随着硬度的降低,0.1g以上的破片数量增加,破片平均尺寸增大,不同硬度D60钢刻槽壳体形成破片初速差异不大。HRC36壳体形成的破片形状较另外2种硬度破片规则,且高硬度壳体材料形成破片穿甲能力较强,可以完全穿透6mm厚Q235A钢板。

In order to acquire the influence of steel hardness on fracture fragmentation behavior of different hardness groove shell under explosively loading,D60 steel with three different hardness was chosen as groove shell material. The forming velocity and mass distribution of D60 steel groove shell fragments were researched through the velocity test and the fragment recovering test. The expanding and breaking processes of D60 steel groove shell,and the variation rules of fragment velocity and fragment mass distribution were numerically simulated by using AUTODYN-3D finite element analysis software combined with the Stochastic failure model. The results show that,with the decrease of hardness,the fragments with the mass of more than 0.1 g decrease gradually,and the average fragment size increases,however the hardness has less influence on the initial velocity of D60 steel groove shell fragments. Compared with the other two kinds of hardness fracture rules,the high-hardness shell material forms a strong ability to break through the armor,and HRC36 fragments can fully penetrate 6 mm-thick Q235A steel plate.