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Outline
Projectiles made of carbon fiber composite material shell and metal warhead have penetrated concrete targets at the speed of 336,447 and 517 m/s, respectively. The angles are 0° and 30° between the perpendicular of target surface and projectile axes. The thickness of concrete target is 200 mm and its compression strength is 30 MPa. The experimental results indicate that the strength of composite material structure is strong. The composite projectile can go through the concrete target without fiber segregation and breakage. Given the same size of the projectile, the mass percent of filler is 18.5% in the composite material projectile, which is about twice of the metal (density of metal is takes as 7.8 g/cm3) projectile. Comparing to metal projectile, little density, high strength composite material projectile can lessen weight, improve charge-weight ratio of powder and enhance specific damage powder.
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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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