Influence of local residual stresses on fatigue crack initiation
Marijo Mlikota, Siegfried Schmauder, Kiarash Jamali Dogahe, Željko Božić
Abstract
The aim of the paper is to investigate the influence of compressive residual stresses on the fatigue initiation life (S-Nini) curve of AISI 1141 steel. The analysis has been performed by means of a micro-structurally-based fatigue crack initiation modelling approach. The focus is set on the local (surface) residual stresses typically imposed by a surface treatment technique known as shot -peening. By superimposing such stresses on stresses resulting from outer cyclic loading, it could be shown that an impact on the fatigue curve in the S-Nini diagram can be achieved.
Topics & Concepts
Shot peeningResidual stressPeeningMaterials scienceDiagramCrack closureFatigue testingStructural engineeringResidualComposite materialFracture mechanicsEngineeringComputer scienceAlgorithmDatabaseFatigue and fracture mechanicsSurface Treatment and Residual StressHigh-Velocity Impact and Material Behavior