On Evaluation of Fatigue Failure Criterion of Aluminium Alloys Based on Inelastic Strain Energy

Abstract

The inelastic strain energy (ISE) models of the material fatigue present one of the feasible approaches to fatigue design. The basis of the approach is the use of ISE in a load excursion as a measure of fatigue damage and the application of corresponding criterion of material failure. This permits one to avoid the obvious disadvantages derived from one-parameter modeling of damage. However, the up-to-date experimental results do not permit direct modeling of the fatigue processes in material when the hysteresis loop cannot be recognized due to microplastic strain dissipated in the elastic media. In engineering applications the extension of ISE approach to high-cycle range of fatigue might be of special interest. The present study shows an example of such extension.