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 were applicable to a slender elliptical hole, and to a long slit with a blunted head. When the blunt crack degenerated into a sharp crack, the present solutions reduced to previously reported ones.

Dislocation Emission Criterion from a Blunt Crack Tip. M.Huang, Z.Li: Journal of the Mechanics and Physics of Solids, 2004, 52[9], 1991-2003