Abstract: A factor of friction power is considered during fatigue, and a new model for predicting fretting fatigue life under low cycle load is presented based on a nominal stress method. For dovetail joint, the problem of elastic contact is solved using the finite element method. Distribution of contact stress and contact status of dovetail joint are obtained, and the location of fretting fatigue crack predicted. With the stress field and contact status of the location,low cycle fatigue(LCF) of the joint can be predicted. Some parameters in the model are evaluated in theoretical analysis and experiment. Experimental results presented in the literature are used to show validity of the proposed model.

Key words:

fretting fatigue, life prediction, low cycle fatigue, dovetail joint, nominal stress method