The system of a wedge disclination dipole interacting with an internal crack was investigated. By using the complex variable method, closed-form solutions of complex potentials to this problem were presented. The analytic formulae of the physics variables, such as stress intensity factors at the tips of the crack produced by the wedge disclination dipole and the image force acting on disclination dipole center were obtained. The influence of the orientation, the dipole arm and the location of the disclination dipole on the stress intensity factors was considered in detail. Furthermore, the equilibrium position of the wedge disclination dipole was also examined. It was shown that the shielding or anti-shielding effect of the wedge disclination to the stress intensity factors was significant when the disclination dipole moved to the crack tips.

Elastic Interaction between Wedge Disclination Dipole and Internal Crack. Q.Fang, Y.Liu: Applied Mathematics and Mechanics, 2006, 27[9], 1239-47