A life evaluation formula for high cycle fatigue under uniaxial and multiaxial loadings with mean stresses

By introducing effective fatigue stresses, multi-axial fatigue problems can be transformed into equivalent uni-axial problems. A damage evolution law has been proposed from the view of cyclic motion of atoms׳ balance position, and the life evaluation formula has been deduced for arbitrary cyclic stress combinations. It is found that both fatigue limit and proportional coefficient of life should be dependent on mean stresses. The relationship...