Full
Outline
Using the AUTODYN-2D software, penetrations of long-rod projectiles into semi-infinite concrete target at an impact speed of 0.6~2 km/s were simulated, in which materials, masses and length-to-diameter ratios of projectiles are different. The effects of impact speed on penetration depth and hole diameter were analyzed. The results show that hole diameter increases with the impact speed. There is a noticeable inflection point of penetration depth. The effect of material, mass and length-to-diameter ratio on inflection point of penetration depth was further studied. The material has a huge impact on inflection point of penetration depth, while mass and length-to-diameter ratio have a little impact on inflection point of penetration depth.
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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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