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对稳态温度场中受冲击载荷作用的炸药药柱进行了弹粘塑性分析。在Ｐｅｒｚｙｎａ本 构模型的基础上，作了适当的补充和修正，将流动参数γ、弹性模量Ｅ均视为温度的函数，动态 有限元计算结果表明，计算曲线和实验曲线有很好的近似。为模拟材料中不均匀性的影响，在 药柱中心引入一孔洞，有限元计算结果给出含孔洞药柱的粘塑性动态响应、药柱网格变形图以 及药柱等温线，可以清楚看出在孔洞附近区域有局部高温产生。本文的本构模型和计算方法对 于研究冲击载荷下炸药装药的力学响应以及炸药装药中热点形成机理的数值模拟提供了良好 的基础。
The visco-elastic-plastic analysis of explosive charge column under steady state temperature field was carried out. On the basis of Perzyna constitutive model, supplemented and corrected appropriately, the flow parameters γ and elastic modulus E are regarded as a function of temperature. The dynamic finite element calculation results show that the calculated and experimental curves are well approximated . To simulate the effect of inhomogeneity in materials, a hole was introduced into the center of the column, and the visco-plastic dynamic response of the hole-containing column was given by finite element analysis. The deformation diagram of the column and the column of drug grain were clearly seen In the vicinity of the hole there is a local high temperature produce. The constitutive model and calculation method in this paper provide a good foundation for studying the mechanical response of explosive charge under impact load and the numerical simulation of the formation mechanism of hot spot in explosive charge.