Stress intensity factors for subsurface fatigue crack growth under contact lading

摘要

The paper describes a general computational model for simulation of subsurface atigue crack growth in the contact area of mechanical elemnts. The model assumes that the initial crack develops along the slip line in a single crystal grain, where the maximum equivalent stress exceeds the local material strength. The position and magnitude of the maximum equivalent stress are determined with the Finite Element Analysis of the equivalen contact model, which is based on the Hertzian contact conditions with the addition of frictinal fores.