Fatigue crack paths in eccentric circumferentially cracked round bar (CCRB) subjected to tensile cyclic loading

Abstract

In this paper, a numerical modelling was developed to study (on the basis of the Paris law) the fatigue propagation paths of eccentric external cracks in circumferentially-cracked round bars (CCRB) subjected to axial displacement. Results demonstrate how the eccentricity (in relation to the wire axis) of the circular resistant ligament increases with the fatigue crack growth. This phenomenon is favoured by the increment of the initial ligament eccentricity (for an initial ligament diameter) and the increase of the Paris exponent m of the material.