Fatigue Equivalent Stress State Approach Validation in Non-conservative Criteria: a Comparative Study

Abstract

This paper is concerned with the fatigue prediction models for estimating the multiaxial fatigue limit. An equivalent loading approach with zero out-of-phase angles intended for fatigue limit evaluation under multiaxial loading is used. Based on experimental data found in literatures, the equivalent stress is validated in Crossland and Sines criteria and predictions compared to the predictions of existing multiaxial fatigue; results over 87 experimental items show that the equivalent stress approach is very efficient.

Keywords:
High cycle fatigue; criteria; proportional loading; non-proportional loading; fatigue limit