A Novel Beam Model for Mode-II Delamination Analysis of Composite Laminates

Abstract

A two dimensional beam model is proposed for delamination analysis of composite laminates, where Timoshenko's plane cross-section assumption is abandoned, and the longitudinal displacement of the beam is proposed as continuous functions of the transverse and the longitudinal coordinates, to match shear deformations. Moreover, the composite laminate is modeled as upper and lower sub-beam through the delamination interface, and corresponding conditions for interface sliding are satisfied through a generalized variational theory. The accuracy of the results of this analytical model is verified by comparison with those from three dimensional finite element models. Furthermore, the influences of delamination depth, length, central position and modulus mismatch ratio (E1/E2) of the upper and lower sublaminate to the energy release rate are discussed.

Study of mode II interlaminar fracture toughness of laminated composites of glass and jute fibres in epoxy for structural applications

“…It was discovered that crack sturdiness under the effect of stacking increased with decreasing score tendency [24]. A composite laminate can be modelled as an upper and lower sub-beam through the delamination interface, and the corresponding conditions for interface sliding are fulfilled through a generalized variational hypothesis [25].…”