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用Hopkinson 拉、压杆装置测试了43CrNi2 MoVA钢的动态力学性能,根据该材质的动态本构关系及爆轰冲击波压力曲线对厚壁圆筒的爆轰自增强过程进行了非线性动态有限元分析,得到了各部位在不同爆轰冲击压力下的应力、位移、速度等随时间的变化规律及塑性变形区尺寸。最后,用Sachs 内层逐次剥层法对爆轰后所产生的残余应力进行了测定,并对爆轰法和静液压法自增强所形成的残余应力进行了对比分析。
The dynamic mechanical properties of 43CrNi2 MoVA steel were tested by Hopkinson tension and compression rod device. According to the dynamic constitutive relationship of the material and the detonation shock wave pressure curve, nonlinear dynamic finite element analysis The variation law of the stress, displacement, velocity and so on under different pressures of detonation were obtained and the size of plastic deformation zone was obtained. Finally, the residual stress produced by detonation was determined by successive delamination of Sachs inner layer, and the residual stress caused by self-enhancement by detonation method and hydrostatic method were compared.