Full
Outline
For analyzing the quasi-isentropic compression experimental data of solid materials, a backward integration method with strength effect is presented based on rate-dependent constitutive equation and fluid elastic-plastic model. From the quasi-isentropic compression data of tantalum on CQ-1.5 with a loading time of 700 ns, the yield strength, deviatoric stress and interior information of the tantalum sample are calculated. Moreover, the Lagrangian sound speed and strain rate are also analyzed. As a result, the driving history and stress distribution of the tantalum sample are obtained. It is found that the yield strength of 1.85 GPa corresponds to the peak stress (30 GPa) with strain rates of 105 s-1, and the isentropic elastic limit is about 2.9 GPa. Numerical results show that the calculated stress-strain and pressure-volume curves appear to be in good agreement with the experimental data from Sandia National Laboratory.
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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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