New Fatigue Damage Analysis of Complex Engineering Components Based on Finite Element Methods (FEM)

摘要

A fatigue damage analysis for multiaxial elastoplastic conditions based on a three dimensional finite element analysis was developed. The analysis includes the material model after Mroz. The fatigue life evaluation in the critical areas is based on plastic work at these locations. The proposed damage concept can be applied to arbitrary multiaxial stress-strain paths. For the evaluation of the damage cycles in terms of closed stress-strain hysteresis loops are not required. The damage is determined on the basis of uniaxial material data (stress-strain curve, life to crack initiation curve).