Studying on influencing factors of Fretting fatigue life of aluminum alloy

To study the influence factors of aluminum alloy Fretting fatigue life, the global finite element model is employed. The effectiveness of the model is validated according to the comparison of analytical solutions and numerical solutions. A new fretting fatigue life prediction model has been proposed base on friction work. The rationality and effectiveness of the model are validated according to the contrast of experiment life and predicting life. At last influence factor on fretting fatigue life of aerial aluminum alloy LY12CZ is investigated with the model. The results reveal that fretting fatigue life decreases monotonously with the increasing of normal load and then becomes constant at higher pressures. At low normal load, fretting fatigue life increases with the incline of pad radius. At high normal load, however, the fretting fatigue life is unrelated with the fretting pad radius. The bulk stress amplitude has the dominant effect on fretting fatigue life. The fretting fatigue life diminishes as the bulk stress amplitude increases.