偏Hugoniot状态下93钨状态方程

摘要

Using a two-stage light gas gun and FPGWI (flier-plates with graded wave impedance),the free surface velocities of 93 tungsten alloy (93W)were measured at the impact velocities of 2.12 km/s and 5.02 km/s respectively and the experimental data were analyzed based on the shock wave theory. The results show that at a low impact velocity the pressures and temperatures of 93W alloy after repeated shock compression are higher than those after a single shock compression,and that at a high impact velocity the reverse is true.The phenomenon is results from the change of the Hugoniot parameters and the volume stress after multiple compressions.%利用动高压实验装置二级气体炮和5层阻抗梯度飞片,在2.12和5.02 km/s的碰撞速度下测量了93钨样品的自由面速度,同时基于冲击波理论对实验测量的自由面速度进行了解读.高温高压下93钨的偏Hugoniot状态方程分析表明,在较低的碰撞速度下多次压缩后93钨的压强和温度要高于单次Hugoniot压缩的压强和温度,而在较高的碰撞速度下截然相反,其主要原因是93钨在多次加载过程中Hugoniot参数和相对压缩性发生了变化.