汽车控制臂后衬套台架试验疲劳寿命分析

实现多轴工况下的橡胶部件的疲劳寿命预测具有重要意义,对橡胶衬套的台架疲劳试验寿命进行预测,研究和分析实现衬套多轴疲劳寿命预测的一些关键问题。进行衬套部件的台架疲劳试验,获得了部件的试验疲劳寿命。选定疲劳损伤模型,进行橡胶材料的疲劳寿命测试,拟合模型参数;使用有限元仿真和线性叠加法计算得到衬套在台架疲劳试验中的应力和应变响应;对衬套的台架试验疲劳寿命进行预测,分析损伤参数、载荷相位、线性叠加等因素对疲劳寿命的影响。结果表明,该文的材料疲劳试验方法和寿命预测方法能够较好地预测橡胶衬套台架疲劳寿命;对于台架试验工况,损伤参数对寿命影响不大,载荷的相位对寿命影响较大,线性叠加引起的误差不大。

Fatigue Life Analysis of Rear Bushing of Automobile Control Arm on Bench Test

It is important to predict rubber component’s life under multiaxial load condition, so the life of a control arm under bench test is predicted to study some key-problems to predict life of rubber component under multiaxial load condition. Bench test of lives of rubber bushings are done and their lives are derived. Fatigue model is chose and its parameters are determined through the fatigue test on rubber specimen. The rubber bushing’s response under bench test is derived with finite element simulation and linear superposition. The fatigue life of rubber bushing is predicted and the influence of damage parameter, load phase, and response superposition method is analyzed. The results show that the test and the prediction method can reliable predict the fatigue life of rubber bushing. The influences on rubber bushing’s fatigue life of choice of damage parameters, linear superposition other than load phase were not significant under the bench test condition.