A fatigue damage map for 2024-T3 aluminium alloy

Abstract

The propagation of a fatigue crack from an initial defect of the same order as the scale of the microstructure through to failure has been modelled using a representation of fatigue damage according to the Navarro-de los Rios (N-R) model. The fatigue processes are presented in the form of a fatigue damage map (FDM). It is shown how the map can be used to create a traditional S-N curve and to provide information suitable for estimating fatigue lifetimes under damage tolerant conditions.