Dislocation emission criterion from a blunt crack tip

摘要

Simple closed-form solutions for critical stress intensity factors were developed for edge dislocation emission from a blunt crack under mode Ⅰ and mode Ⅱ loading conditions. The solutions are applicable both for a slender elliptical hole and a long slit with blunted head. When the blunt crack considered degenerates to a sharp crack, the present solutions reduce to those previously reported in literature.