Hysteretic Effects and Progressive Delamination at Composite Interfaces

Abstract

Interface delamination is usually accompanied by friction slip at contacting interfaces under compressive normal traction. The present work is devoted to the analysis of friction slip phenomena for monotonic and cyclic loading involving progressive and reversal slips with account for memory of load reversal. The progressive delamination interacts with the friction slip by affecting hysteretic response. Both limit stress and potential energy conditions are used in specifying the delamination evolution. When friction slip conditions during cyclic loading are affected by surface wear with respective variation of contact parameters, the delamination growth may occur in the course of cyclic loading. Three specific examples are treated in detail: i) cyclic tension of an elastic strip adhering to the interface; ii) fiber pull-out problem for cyclically varying load; iii) monotonic and cyclic flexure of a beam sliding on the frictional interface.