Elastic–plastic FE analysis of a notched cylinder under multiaxial nonproportional fatigue loading with variable amplitudes

This paper presents an elastic–plastic finite element (FE) analysis of an axisymmetric circular cylinder with a circumferential notch subject to multiaxial nonproportional fatigue loading with variable amplitudes. The von Mises yield criterion and the linear kinematic hardening rule of Prager–Ziegler are applied to describe the elastic–plastic material behavior. Two different loading combinations are considered: (1) constant tension with variable amplitude torsion; (2) variable amplitude tension with variable amplitude torsion. Numerical results for the local stress–strain curves at the notch-root are presented and discussed.