An Empirical Material Constant on the Hugoniot of Solids: From Comparative Study of Porous Materials
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摘要: 对不同初始密度样品冲击压缩Hugoniot数据的系统分析显示，对每种固体物质而言存在一个表征材料特性的沿其Hugoniot线不随冲击压力而变的经验常数。的数值随材料而异。对金属元素而言，该经验特性常数与初始密实密度0之间遵循同一个幂指数关系。利用该常数，可很方便地对不同初始密度的Hugoniot数据进行换算，并可以很方便地获得Grneisen参数。还对值为常数的适用范围作了讨论。Abstract: From the systemically comparative study of previous experimental solid Hugoniot data of different porous samples, a new material parameter , which keeps in constant along Hugoniot for all kinds of solid materials, was revealed. For different materials, the value of is different. There exist an universal power relationship between material constant and initial density 0 for metal. By using this constant , Hugoniot data between different porous samples can be converted very simply, and Grneisen parameter can also be obtained very easily. The limitation of this empirical material parameter being as a constant was discussed with variations of pressure and porosity.
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Key words:
- shock Hugoniot /
- empirical material constant /
- porous sample
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Wu Q, Jing F Q, Li X Z. Behaviour of Grneisen Parameter at High Pressure and Temperature Inferred from Shock Compression Data [J]. Chinese Phys Lett, 2002, 19: 528. Jing F Q. Introduction to Experimental Equation of State [M]. Beijing: Scientific Press, 1986. 371. (in Chinese). 经福谦. 实验物态方程导引 [M]. 北京: 科学出版社, 1986. 371. Marsh S P. LASL Shock Hugoniot Data [Z]. Berkeley: University of California Press, 1979. Ahrens T J. Mineral Physics Crystallography: A Handbook of Physical Constants [Z]. Washington D C: American Geophysical Union, 1995. -
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