Full
Outline
Based on one-stage light gas gun, series of experiments including oblique planar impact with inclination angles of 0~15° and impact velocity ranging from 68 to 201 m/s were carried out to investigate the responses of alumina microvoid ceramics with high porosity subjected to impact loading. Experimental results show that since the diameter of microvoid in sample is smaller than 5 μm, the process of sample compression is gradually and evenly developed, and there is no porous collapse observed. The dynamic shear behaviors are similar to those of brittle materials. Based on the Hoek-Brown criteria and Cap-model, the dynamic model for the failure surface and the double yield surfaces of porous brittle materials was built. Based on the experimental data of compression and shear combined impact loading, the preliminary analyses were carried out and the results show the applicability of the model.
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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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