Abstract
Several solutions of stress intensity factor have been proposed for a semi-elliptical surface crack with an upper limitation of aspect ratio a/c = 2, where a is the crack depth and c is the half of crack length, in a finite plate. In this study, the influence coefficients, which are used to evaluate stress intensity factors for cracks subjected to arbitrary stress distribution, for cracks with a/c = 4 and 8 were calculated based upon the influence function method in conjunction with the finite element method, and stress intensity factor solution was developed for surface cracks with high aspect ratio subjected to a polynomial stress distribution. Fatigue crack growth analyses were performed for cracks with high aspect ratio using the presented solution, and the effect of variation of initial crack aspect ratio on the variation of crack shape and the fatigue life was examined.
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