Abstract:Aimed at the fretting fatigue phenomenon existed between the connecting rod and bushing interference fit,the finite element model of connecting rod was established,and the fretting fatigue simulation was conducted with ANSYS.The stress and displacement distribution on the contact surface of the connecting rodbushing was extracted and analyzed,and the fretting crack initiation location of bushing was predicted by using RUIZ comprehensive parameter method,MSR critical surface method and the thermodynamic dissipation potential function method respectively.Results show that the predicted crack initiation location with three methods is very close,that is,the inner side of the bush edge is the most easy to crack.The fretting fatigue tests were carried out with the simulated specimens and the square foot bridge.Results show that the predicted location is consistent with the experimental data,and the prediction results based on the thermodynamic potential function method is the most accurate.