疏松金属材料冲击温度理论分析

以热力学原理和固态物质的三项式物态方程为基础,由密实物质的冲击绝热线和热力学状态,通 过等容线法推导出了疏松金属材料的冲击温度理论计算方法。以铁为例,分析了几种物理参数对该模型计算 结果的影响。计算和分析结果显示,利用新模型得到的计算结果与已有实验结果吻合较好,误差均在5%以 内。疏松金属材料的冲击温度受Grneisen系数、电子Grneisen系数影响不大,而密实度、冲击压力和电子 比热系数则会对疏松金属材料冲击温度产生较大影响。

Theoretical analysis on shock temperature of porous metal

Based on the thermodynamics and the three-term equation of state,the shock temperature of porous metal was theoretically analyzed for the Hugoniot adiabat,state parameters and isovolumic extrapolation of solid materials.By combining the calculated cold energy,the calculated cold pressure and the Hugoniot equations of solid metal and porous metal,a new method was presented to calculate the shock temperature of porous metal.The porous iron was chosen as an example to discuss the influences of the several physical parameters on the calculated result by the presented method.The calculation example shows that the calculated shock temperature for the porous iron is in good agreement with the existent experimental data and the corresponding errors are less than 5 percent.And the shock temperature of porous metal can be little influenced by the Grüneisen parameter and the electronic Grüneisen parameter,but it can be influenced evidently by material compactness,shock pressure and electronic specific heat coefficient.