Several groups of fatigue damage parameters under three typical loading cases(i.e.,fully reversed tensional,fully reversed torsional and 90°non-proportional loading) are discussed in this paper and a new life prediction model for multiaxial high-cycle fatigue is proposed.The proposed model is based on a nonlinear combination of the maximum shear stress amplitude and maximum normal stress on the critical plane defined by the plane of maximum shear stress range.A compromising solution to correct the mean norm...