A linear spring model was used to study imperfect interfaces, and the interaction of a screw dislocation with an imperfect interface was formulated. The results showed that the interacting force on a screw dislocation with an imperfect interface varied between that with a free surface and that with a perfect interface.

Screw Dislocation Interacting with Imperfect Interface. H.Fan, G.F.Wang: Mechanics of Materials, 2003, 35[10], 943-53