It is the main work to predict fatigue life in Damage Tolerance Analysis. Usually the fatigue damage accumulation theory and the fracture theory are used in the fatigue crack initiation life estimation and the fatigue crack propagation life estimation respectively. As the estimated fatigue lives can not interlinked harmoniously, it is inconvenient to calculate the frill fatigue life. Thus, it is an important item in the study of fatigue to develop fatigue full-life estimation methodology which ...