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Taking the cast iron rear axle housing of commercial vehicle as the research object, the bench test fatigue life data analysis and processing of several axle shell types are carried out. And the number of loading cycles at failure is obtained. Using the finite element fatigue analysis method based on time history load, the fatigue equivalent stress of the cast axle housing under the corresponding load cycle is obtained. Then the S-N curve of the cast axle housing is fitted by combining the fatigue equivalent stress and number of failure cycles. The results show that, the current analysing cast axle housing has a problem of low defect control level. The manufacturing process level needs to be improved. Moreover, the importance of formulating defect level classification during design is proposed. The application of the finite element fatigue analysis combined with the test data can effectively predict the fatigue life of the newly designed structure on the premise of stable process level. The finite element analysis results and manufacturing process can be combined effectively to expand the practicability of the bench test data.
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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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