Title of article :
An analytical delamination model for laminated plates including bridging effects
Author/Authors :
Fabrizio Greco، نويسنده , , Paolo Lonetti، نويسنده , , Raffaele Zinno، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Abstract :
penalised interface model, whose strain energy is the penalty functional related to interface adhesion constraint, is
introduced in conjunction with a damageable interface whose local constitutive law, in turn, represents bridging stress
effects, in order to analyse delamination and bridging phenomena in laminated plates. The laminate is modelled by
means of first-order shear deformable layer-wise kinematics and the governing equations are formulated in the form of
a non-linear differential system with moving intermediate boundary conditions related to opportune delamination and
bridging growth conditions. The problem is solved through an analytical approach. The model leads to an accurate and
self-consistent evaluation of the energy release rate and its mode components due to the inclusion of significant contributions
arising from coupling between in-plane and transverse shear stresses, and to an asymptotic estimate of interlaminar
stresses. The salient features of the proposed model are investigated in the context of an energy balance
approach and of a J-integral formulation, thus providing simple results useful to model delamination growth and
bridging behaviour when mixed mode loading is involved. The accuracy of the proposed model is substantiated through
comparisons with results from continuum analysis obtained by a finite element (FE) procedure. The effectiveness of the
proposed model is highlighted by showing the solution of a two-layered plate scheme subjected to pure and mixed mode
loading conditions and to fibre bridging stresses. The results point out that the present model, despite its low computational
cost in comparison with more complex FE analyses, is an efficient tool to predict delamination and bridging
evolution
Keywords :
Delamination , Laminates , bridging , Interface elements
Journal title :
International Journal of Solids and Structures
Journal title :
International Journal of Solids and Structures