Damage Analysis of Low Cycle Multiaxial Fatigue under Proportional and Non-Proportional Loading

Abstract

This thesis deals with the study of determination fatigue life of aluminum alloy AA2124-T851 prediction of materials at multiaxial fatigue. The first part of the thesis introduces uniaxial fatigue going to multiaxial fatigue. The next part focuses on the elaboration of separate criteria of multiaxial fatigue mainly for low-cycle fatigue for the estimation of life prediction of testing materials. Because the testing specimens were controlled strained at non-proportional low-cycle fatigue, these criteria were also selected in order to correspond with the given loading. The last part of this thesis is devoted to the evaluation of individual tests from different loading paths in the half of the life prediction of the component and following evaluation using specific criteria.