A study was made of the cracking characteristics of mixed-mode dislocations near to a lip-like mode crack. Stress intensity and strain energy density factor were obtained by using conformal mapping, singularity analysis and Cauchy integrals. The shielding effect generated by screw dislocation near to a lip-like mode crack decreased with increasing distance between a screw dislocation and the crack tip. A larger distance between the two faces of the crack led to the shielding effect weakening. The strain energy density factor of mode-III decreased with increase in the distance between dislocation and crack tip. A larger distance between the two faces of the lip-like mode crack also led to the strain energy density factor weakening and encouraged crack initiation. The shielding effects generated by an edge dislocation near to the crack decreased with increasing distance between the edge dislocation and the crack tip. Cracking Characteristics of Mixed Mode Dislocations Near a Lip-Like Mode Crack. C.Xie, Y.W.Liu, Q.H.Fang, M.Deng: Theoretical and Applied Fracture Mechanics, 2009, 5[2], 139-43