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摘要: 通过引入描述多孔材料中非零压状态基体体积占有比的承压系数v，取代过去常用的多孔度，对多孔材料的本构方程进行修正而得到p＝vF(v, E)，解决了多孔材料发生熔化时，本构方程不适用的问题。应用结果表明，这种修正是合理的和可行的，对多孔材料的数值模拟工作具有一定的参考价值。Abstract: This paper modifies the constitutive equation of the porous materials by introducing a new variable v instead of , which describes the occupation ratio of non-zero pressure matrix volume in porous materials. The new equation p＝vF(v, E) solves the problem the p- model encountered when it is applied to partially melt porous materials. The result of the numerical simulation shows that this modification is reasonable and feasible, and is of valuable for numerical simulation to porous materials under shock wave loading.
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Key words:
- porous material /
- constitutive equation /
- anti-pressure factor v
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Herrman W. J Appl Phys, 1969, 40: 2490. Carroll M M, Holt A C. J Appl Phys, 1972, 43(2): 759-761. Carroll M M. J Appl Phys, 1972, 43(4): 1626-1636. Carroll M M, Holt A C, Butcher B M. J Appl Phys, 1974, 45(9): 3864-3875. Carroll M M, Kim K T. J Appl Phys, 1986, 59(6): 1962-1967. 孙崇峰, 张若棋. 髙压物理学报, 1991, 5(2): 154-159. -
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