装载机驱动桥半轴疲劳强度影响因素分析

Influence Factors Analysis for Fatigue Strength of Loader Drive Axle Shaft

在再制造业工程机械领域中,半轴花键产生疲劳裂纹是半轴的主要失效形式,其裂纹特征决定半轴回收件的再制造处理工艺。采用基于缺陷建模的半轴强度分析方法,根据驱动桥半轴回收件裂纹的统计情况,随机选择一组裂纹特征的几何参数,建立齿根裂纹模型,使用ANSYS软件进行有限元静力分析,观察半轴最大等效应力与裂纹几何参数的变化关系及裂纹对半轴强度的影响。

In the remanufacturing field of engineering machinery, a main axle failure mode is crack on root of spline. The crack characte- ristics play a key role in the manufacturing process of the used axle. An axle strength analysis method based on crack modeling was introduced. According to statistics, a group of crack geometry parameters were randomly selected , then root of axle spline models were built. These models were analyzed with finite element analysis software ANSYS. The relationships between the maximum Von Mises stress in the axle spine and the crack geometrical parameters were analyzed and the effects of cracks on axle strength were also obtained.