Extension–bending coupling phenomena and residual hygrothermal stresses effects on the Energy Release Rate and mode mixity of generally layered laminates

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Abstract

This article presents a novel analytical solution to the delamination problem of interface deformable generally layered (asymmetric and unbalanced) composite laminates. The governing equation describing the interface forces and moments is obtained for the reduced form of the first-order shear deformation theory of plates (FSDT) under plane strain assumptions and accounts for the extension–bending coupling phenomena and residual hygrothermal stresses, both of which have been neglected in the past. The interface forces and moments are included in a novel generalization of the J-integral which is used for the estimation of the Energy Release Rate (ERR). The analytical results of the ERR and the mode mixity exhibit a great agreement with the results of Finite Element (FE) models developed using the Cohesive Zone Method (CZM) and the Virtual Crack Closure Technique (VCCT) for a Double Cantilever Beam (DCB) test of a generally layered fibre metal laminate.
Original languageEnglish
Article number112297
JournalInternational Journal of Solids and Structures
Volume 277–278
DOIs
Publication statusPublished - 15 Aug 2023

Bibliographical note

Funding Information:
The financial contribution of FWO Research Foundation–Flanders, Belgium (file number 1102822N) is gratefully acknowledged.

Publisher Copyright:
© 2023 Elsevier Ltd

Copyright:
Copyright 2023 Elsevier B.V., All rights reserved.

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