Abstract
Based on an approximate stress-intensity factor for a crack emanating from an elliptical-cylindrical or spheroidal cavity, the El Haddad intrinsic-crack method for modelling the notch fatigue limit of a solid containing a cavity has been extended from a straight through-crack or a circular crack to a wider range of cavity shapes. Thus, predictions of the notch fatigue limit have been presented for elliptical cylinders, ranging from a through-crack to a circular cylinder, and for limiting cases of spheroids, viz. the circular crack and the sphere. These predictions have been shown to be in good to excellent agreement with those based on the theory of critical distances.
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