This study aims to establish an effective method for predicting the fatigue life of an automotive wheel in the accelerated dynamic cornering fatigue test. The test was simulated by linear transient dynamic finite element analysis, in which a rotating force of constant magnitude was applied to the moment arm tip to simulate the rotational bending effect on the wheel, with the wheel being fixed. Furthermore, transient strain histories of the elements were obtained and the critical elements with the largest amplitudes in their respective steady radial strain histories were found. The steady radial strain histories of all the critical elements were processed based on the local stress-strain approach, and the shortest simulated fatigue lives were taken as the predicted wheel fatigue lives. The predicted fatigue life was in good agreement with the average real-world test life of the investigated wheel.

本研究旨在建立一种在加速动态转弯疲劳试验中预测车轮疲劳寿命的有效方法。通过线性瞬态动态有限元分析对测试进行了模拟，其中将恒定大小的旋转力施加到力矩臂尖端，以模拟车轮在固定的情况下对车轮的旋转弯曲效果。此外，获得了单元的瞬态应变历史，并找到了在其相应的稳态径向应变历史中振幅最大的关键单元。基于局部应力应变方法处理了所有关键要素的稳态径向应变历史，并以最短的模拟疲劳寿命作为预测的车轮疲劳寿命。