The interaction between an edge dislocation and a crack emanating from a semi-elliptic hole was dealt with. Utilizing the complex variable method, closed form solutions were derived for complex potentials and stress fields. The stress intensity factor at the tip of the crack and the image force acting on the edge dislocation were also calculated. The influence of the morphology of the blunt crack and the position of the edge dislocation on the shielding effect to the crack and the image force was examined in detail. The results indicate that the shielding or anti-shielding effect to the stress intensity factor increases acutely when the dislocation approaches the tip of the crack. The effect of the morphology of the blunt crack on the stress intensity factor of the crack and the image force was very significant.

Elastic Behaviour of an Edge Dislocation near a Sharp Crack Emanating from a Semi-Elliptical Blunt Crack. Q.H.Fang, H.P.Song, Y.W.Liu: Chinese Physics B, 2010, 19[1], 016102