RDX(210)单晶准等熵压缩实验的数值分析

Numerical analysis of quasi-isentropic compression of RDX(210) crystal

基于准等熵压缩实验,建立了考虑线弹塑性效应的反积分数学模型,并针对Sandia的含能材料RDX(210)的无反应准等熵压缩实验数据,进行了数值模拟和分析。结果表明,本文模型可以恰当地描述该含能材料的准等熵压缩实验过程,可以得到与文献结果吻合较好的样品加载速度历史;计算得到了样品内部任意位置直至加载面上的信息、应力应变和拉格朗日声速的变化规律;基于参数的数学搜索过程,获得了该RDX(210)加载实验的准等熵参考线。

Aimed at quasi-isentropic compression experiments,a backward integration model was proposed by consi-dering linear elastic-plastic effects.The quasi-isentropic compression experiment data of RDX(210) crystal from the Z machine of Sandia National Laboratory were numerically analyzed.Comparison between the numerical results and the data by Baer M R,et al displays that the proposed backward integration model can be used to describe the quasi-isentropic compression of RDX(210) crystal.And this integration method was used to calculate the information at any position in the RDX(210) sample,especially at the loading surface,stress-strain curves and Lagrangian sound velocities.The quasi-isentrope was achieved based on the mathe-matic search process of parameters.