关键词: 后拉杆衬套；结构优化；有限元分析；应变；耐久

Abstract: After a car pull rod bushing in bench test phase main root crack, and the outer tube crack of vulcanized rubber degum, limit block root failure phenomena. By analyzing the cracking of the failure parts, the key factors affecting the durability, such as the thickness of the lining coating, the structure of the main reinforcement, the shape of the limit block and the change of the hardness of the rubber material, were optimized. The finite element analysis method was used to verify the consistency between the strain concentration position and the actual fracture position. The damage coefficient derived from the optimized structure met the durability requirements, the durability of the actual bench test was qualified, and the customer passed the road test in the later stage.

Key words: Rear tie rod bushing; Structural optimization; Finite element analysis; Strain; Durability