| Many failures between tenon and mortise in aero-engine are founded under fretting circumstance, sometimes it is a main cause of failure and it is important to research the fretting fatigue life of tenon/morties. First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method (FEM) and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments. |
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