Crack modelling: a novel technique for the prediction of fatigue failure in the presence of stress concentrations

摘要

Finite element (FE) analysis and other compu- tational method have developed rapidly in recent years, allowing accurate predictions of elastic stresses in com- ponents of complex geometry. However, the prediction of fatigue failure in these components is still a non-trivial problem; one reason for this is the difficulty of assessing stress concentrations and regions of high stress-gradient. This paper describes a new technique, called "crack Modelling", which addresses the problem through a Modification of linear-elastic fracture mechanics (LEFM).