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The significant life reduction of mechanical components during non-proportional loading compared to proportional loading results from the additional damage. In this study, the factors affecting the fatigue life under non-proportional loading were analyzed, and a new non-proportional damage factor was proposed. A novel fatigue life prediction model based on equivalent strain was established with the maximum shear plane as the critical plane. The new multiaxial fatigue life prediction model not only considers the effect of normal stress on the critical plane on the material crack initiation and crack propagation, but also reflects the non-proportional loading on the multiaxial fatigue life by introducing the non-proportional hardening coefficient of the materials and non-proportionality of the load paths. Experimental data under multiaxial loading of five materials were used to verify the accuracy of the novel model, and were also compared with two classical models. The results show that the prediction accuracy of the proposed model is higher.
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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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