A Study on Finite Element Analysis and Optimization of Rear Bush of Vehicle Lower Control Arm

The rubber bush of the lower control arm has an important effect on the dynamic performance and NVH performance of the vehicle. To ensure that the rubber has an enough life during the period of use, the stress value of the bush should be in the proper range and the stress distribution should be reasonable. The finite element analysis of the bush is carried out by using ABAQUS. Firstly, the stiffness of the bush simulation is evaluated by the stiffness of the bush test. Secondly, based on this, the stress situation of the bush in the common working condition is investigated. Finally, the linear approximation model is established by ISIGHT in order to optimize the angle of the bush opening. And the angle of the bush opening direction at the optimum stress condition is obtained.