Selection of multiaxial fatigue damage model based on the dominated loading modes

Based on the strain-based multiaxial fatigue models, a method was proposed to calculate multiaxial fatigue damage. If the calculated fatigue damage by the shear strain parameter is less than that by the axial strain parameter, an axial strain-based multiaxial fatigue model was used to calculate fatigue damage, or else a shear strain-based multiaxial fatigue model was used to calculate fatigue damage. The proposed multiaxial fatigue damage calculation method was verified by some experimental data under tension–torsion constant amplitude loading. The results showed that a good agreement is demonstrated with experimental data.