| 张志远,程稳正,楼位鹏,姚再起,毕如俊,赵彤彤.基于裂纹扩展模型的乘用车前下摆臂后橡胶衬套疲劳寿命提升研究[J].橡胶科技,2025,23(12):0672-0681. |
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| 基于裂纹扩展模型的乘用车前下摆臂后橡胶衬套疲劳寿命提升研究 |
| Research on Fatigue Life Improvement of Rear Rubber Bush of Front Control Arm of Passenger Car Based on Crack Grown Model |
| 投稿时间：2024-12-12 修订日期：2024-12-12 |
| DOI：10.12137/j.issn.2095-5448.2025.12.0672 |
| 中文关键词: 橡胶衬套 裂纹扩展模型 空间插值法 随机载荷疲劳 块谱转换 快速验证 |
| 英文关键词: rubber bush crack propagation model spatial interpolation method random load fatigue block spectrum conversion fast verification |
| 基金项目:基于数字驱动的的汽车设计和仿真软件开发与集成(20232ZDYF020091). |
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| 中文摘要: |
| 以乘用车前下摆臂后橡胶衬套为研究对象，构建裂纹扩展模型，将橡胶材料的失效行为描述为撕裂能与裂纹扩展速率之间的关系，克服了传统的唯象模型对复杂受力状态适应性较差的问题。采用空间插值法计算橡胶衬套随机载荷疲劳寿命，解决了非线性响应结构疲劳寿命分析的难题。以橡胶衬套随机载荷疲劳寿命为基准，结合载荷特征和损伤表现制定出与路谱高度关联的块谱，用于方案迭代和台架快速验证，极大地提高了效率。采用球形内骨架设计提升橡胶衬套径向挤压作用下的摆动寿命，均匀设计撞块同时采用高硬度胶料提升撞块的抗挤压性能和耐磨性能。改进结构通过了台架快速验证，并将单件快速验证合格的零件搭载于系统台架和整车中进行试验，结果满足疲劳寿命要求。通过橡胶衬套开裂问题改进，建立了解决橡胶衬套耐久性问题的工作流程，对新产品开发也有一定指导意义。 |
| 英文摘要: |
| In order to solve the rubber bushing system bench bump block cracking problem; A crack growth model was constructed, and the failure behavior of rubber material was described as the relationship between tearing energy and crack growth rate. The problem of poor adaptability of traditional phenomenon models to complex stress states was overcome. The fatigue life of rubber bushing under random load was calculated by spatial interpolation method, and the difficult problem of fatigue life analysis of nonlinear response structures was solved. Based on the random load fatigue life of the bushing, a block spectrum highly correlated with the road spectrum was developed by combining the load characteristics and damage performance, which was used for scheme iteration and rapid bench verification, greatly improving the efficiency. The spherical inner skeleton design was adopted to improve the swing life under radial extrusion, and the high hardness rubber material was used to improve the extrusion and wear resistance of the ram. The improved structure has passed the bench quick verification, and the single fast verified part is Taking the rear rubber bush of front control arm of passenger car as researching subject，a crack growth model was constructed，and the failure behavior of rubber material was described as the relationship between tearing energy and crack growth rate，which overcame the problem of poor adaptability of traditional phenomenon models to complex stress states.The fatigue life of rubber bushing under random load was calculated by spatial interpolation method to solve the difficult problem of fatigue life analysis of nonlinear response structures.Based on the random load fatigue life of the rubber bush，a block spectrum highly correlated with the road spectrum was developed by combining the load characteristics and damage performance，which was used for scheme iteration and rapid bench verification to greatly improve the efficiency.The spherical inner skeleton design was adopted to improve the swing life under radial extrusion，and the high hardness compound was used to improve the extrusion resistance and wear resistance of the ram.The improved structure passed the bench quick verification，and the single fast verified part was carried on the system bench and the whole vehicle to test，the results met the fatigue life requirements.Through the rectification of the rubber bush cracking problem，the work flow of solving the rubber bush durability problem was established，which had guiding significance for the new product developping. |
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