A triggering criterion was proposed for determining the instability of a dislocation source under mode-I singular stressing. Two types of configuration were considered; including a crack and a wedge formed by climbing dislocation pile-ups. Numerical results were obtained for both cases.

A Triggering Criterion of Dislocation Sources under Mode-I Singular Stresses. Z.X.Lu, S.W.Yu, X.Q.Feng: International Journal of Fracture, 2004, 126[3], 281-6