Fatigue Life Prediction of Shaft Parts

Taking high speed rotating shaft parts as the research object, the general fault mode of the parts is analyzed. The analysis process of shaft parts is expounded by means of finite element analysis method. A variety of fatigue life prediction methods for mechanical equipment parts are reviewed in this paper. And the selection and calculation method of parameters in the life prediction model of shaft parts are summarized. Finally, taking a gear shaft of a reducer as an example, the Morrow linear correction of the elastic stress model, Manson-Halford(M-H)correction model and Smith Watson Topper(SWT)correction model are applied to fatigue life assessments. The prediction results of the SWT correction model are relatively conservative. The prediction results of the Morrow linear correction of the elastic stress model and the M-H model are similar, and they are larger than the SWT correction model.