基于弯曲和径向疲劳试验的高强钢车轮仿真分析

选择具有优良成形性能的600 MPa级马氏体相钢制作成形复杂的轮辐及540 MPa级贝氏体双相钢制作轮辋。建立三维模型和有限元模型,采取静态分析模拟动态分析的方式分别对车轮弯曲和径向工况进行仿真分析,得出易于产生疲劳裂纹的应力集中点及其最大应力、应变值。选用疲劳寿命名义应变法建立了高强钢车轮的E-N曲线,利用疲劳分析软件对该车轮进行疲劳寿命分析。仿真结果表明,2种试验仿真中出现最大应力的位置与试验显示的位置相一致,进而验证了有限元方法预估高强钢车轮寿命的有效性。

Simulation Analysis of High Strength Steel Wheels Based on Bendingand Radial Fatigue Tests

In this paper,600 MPa grade martensitic phase steel with excellent forming properties is selected to make complex spokes and 540 MPa grade bainite duplex steel to make rims.The three-dimensional model and finite element model are established.The static analysis and dynamic analysis are used to simulate the wheel bending and radial conditions respectively,and the stress concentration points and their maximum stress and strain values which are prone to fatigue cracks are obtained.The E-N curve of the high-strength steel wheel is established by the fatigue life nominal strain method,and the fatigue life analysis of the wheel is performed by the fatigue analysis software.The simulation results show that the position of the maximum stress in the 2 test simulations is consistent with the position of the test,which verifies the effectiveness of the finite element method for estimating wheel life.