A coupled plasticity correction approach to estimating notch root strains under multiaxial cyclic loading

Based on pseudo strain approach, a coupled plasticity correction approach is proposed to calculate conveniently local strains for blunt notches under multiaxial cyclic loading. A detailed algorithm of the method is presented. Compared with conventional pseudo strain based approach, the proposed method does not require the plasticity model twice. The applicability of the method was evaluated by the measured notch root strains for a notched round shaft subjected to combined axial–torsion multiaxial cyclic loading. The results showed that the proposed method was acceptable and the calculated axial strain range was more accurate than the calculated shear strain range.