High-Temperature Fretting Fatigue Under Variable Loading Simulating Practical Loading

Abstract

The S-N curves, where fretting fatigue life under block loading simulating practical loading was arranged using the equivalent stress based on the modified Miner's rule, were identical with those under constant amplitude loading at both room and elevated temperatures. The results indicated the effectiveness of the modified Miner's rule to fretting fatigue under variable loading at elevated temperatures. The S-N curves, where fretting fatigue life under random loading was arranged using the rms value of stress amplitudes, were almost identical to those under constant amlitude loading. The proposed method of life prediction based on the fracture mechanics analysis was successfully applied to variable-loading fretting fatigue at elevated temperatures.