Author(s)

P. Broz

Abstract

In order to predict fatigue crack growth, an energy conception has been applied. When considering the strain energy in consequence of crack blunting phenomenon, the relation deduced for crack propagsation has emerged that it is dependent on both the loading and material parameters. A wide validity of the above expression has been proved. Former calculations on the basis of the plane strain formulation have turned out to be capable of use even in the case of blunt cracks with a small curvature. Close to the front of these cracks, components of both the displacement and stress have been determined by dint of a threedimensional BEM algorithm. Lastly, the stress intensity factor values have been reckoned for variants of a throught crack and surface one. 1 Introduction Works 1. and 2.

Keywords