抄録
The fretting fatigue life of compressor dovetail was investigated using stress singularity theory. It is found that the crack initiation of fretting fatigue occurs at the contact edge of blade dovetail between blade dovetail and wheel dovetail. The parameters of stress singularity obtained from maximum principal stress distribution is capable to evaluate the fretting fatigue with the cyclic load having a constant angle against the contact surface under a variable contact pressure. The ratio ΔHl / ΔHc between intensity range of stress singularity and critical intensity range of stress singularity is proposed to predict the fretting fatigue life as effective parameter.
