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Outline
A theoretical method was proposed to evaluate the Hugoniot parameters of the preheated metals based on Grüneisen equation of state. This method offsets some disadvantages of BACT and can be used to estimate Hugoniot parameters of all kinds of solids with preheating in principle. This method was applied to calculate the Hugoniot parameters for Al and TC4 at different initial temperatures up to 1 200 K and compared the obtained results with the available data reported in literature. It is shown that the moderate preheating of metal does not result in an obvious deviation from its principal Hugoniot. Thus the rough treatment in hypervelocity impact experiments that the Hugoniot of preheated flyer is approximated to be the principal Hugoniot is reasonable.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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