Based on Goodman curve

the worst-case equilife curve considering the influence of the stress concentration and the dispersion coefficient of fatigue strength was constructed firstly

and then the worst-case equilife curve was used to establish the high-cycle fatigue/low-cycle fatigue (HCF/LCF) complex fatigue analysis method of the propeller shaft

and this method was used to predict the safety life of propeller shaft

but the applicable range of the prediction method the low-cycle fatigue was between 103 and 105 cycles. Adopting this method

the HCF/LCF complex fatigue of an aero-engine propeller shaft under two kinds of loads was analyzed

and compared with the experiment. The result shows that it is feasible to predict the HCF/LCF complex fatigue of the propeller shaft using the method based on the worst-case equilifecurve; and it can successfully predict a kind of loads safety life lower than 1000 cycles of low-cycle fatigue

and another kind of loads prediction result fits well with the experimental one.