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To address the cracking issue of the rear rubber bushing in the front suspension lower control arm during road testing for a specific vehicle, a life simulation method considering the influence of the diameter shrinkage is proposed. Firstly, the static stiffness of the bushing after diameters shrinkage is simulated, and combined with multi-objective optimization, hyper elastic constitutive parameters that accurately describe the force-displacement characteristics of the bushing are obtained. Then, on the basis of considering pre-strain from diameter shrinkage, crack grow algorithm methods are employed to predict bushing life, achieving a damage level of 2.01 at critical location, which replicates the cracking problem observed in road tests. Finally, through structural optimization design, damage at hazardous locations is reduced to 0.943. The road test results show that the fatigue life of the optimized bushing can be improued effectively, and the proposed scheme is proved to be effective.
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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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