Calculation of Hugoniot properties for shocked nitromethane based on the improved Tsien's EOS

We have calculated the Hugoniot properties of shocked nitromethane based on the improved Tsien＇s equa- tion of state （EOS） that optimized by ＂exact＂ numerical molecular dynamic data at high temperatures and pressures. Comparison of the calculated results of the improved Tsien＇s EOS with the existed experimental data and the direct simu- lations show that the behavior of the improved Tsien＇s EOS is very good in many aspects. Because of its simple analytical form, the improved Tsien＇s EOS can be prospectively used to study the condensed explosive detonation coupling with chemical reaction.

Bukit Timah花岗闪长岩的Hugoniot状态方程

在单级轻气炮上对花岗岩的激波状态方程进行了实验测定。最高撞击速度为８００ｍ／ｓ，相应的最高撞击压力是７ＧＰａ。锰铜应力计被用于测量撞击应力或平均激波速度。由实验结果拟合得到ＢｕｋｉｔＴｉｍａｈ花岗岩的Ｈｕｇｏｎｉｏｔ线性关系式和多项式状态方程。

花岗岩高压状态方程实验研究

通过二级轻气炮开展了花岗岩的飞片高速、超高速撞击实验,研究了花岗岩的Hugoniot冲击关系和高压状态方程。实验样品中的平均冲击波速度由光纤探针测量,实验最大撞击速度为4.47 km/s,对应的最高撞击压力为42.4 GPa。通过对有效实验结果进行拟合,得到了高压下花岗岩的Hugoniot关系、Hugoniot参数C和λ以及多项式状态方程。研究结果可为花岗岩材料在岩石爆破、陨石撞击等领域的应用提供参考。