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Title: Mode I interlaminar fracture of woven glass/epoxy multidirectional laminates
Author: Pereira, A.B.
Morais, A.B. de
Moura, M.F.S.F. de
Magalhães, A.G.
Keywords: Polymer-matrix composites (PMCs)
Fracture toughness
Finite Element Analysis (FEA)
Issue Date: 2005
Publisher: Elsevier
Abstract: Mode I Double Cantilever Beam (DCB) tests were performed on woven glass/epoxy multidirectional laminates. Selected specimen stacking sequences with starter delaminations in theta/-theta and 0/theta interfaces were first evaluated with three-dimensional finite element (FE) models. During the DCB tests, most specimens suffered intraply damage and crack branching to a neighbouring interface. Nevertheless, it was generally possible to measure valid interlaminar critical strain energy release rates, G(IC), of initiation from the film and from a mode I precrack. The former were significantly lower than the latter due to steep R-curve effects. G(IC) values of 0/theta specimens were fairly theta-independent, while theta/-0 specimens exhibited higher G(IC) from the film. A subsequent FE analysis provided explanations for the interface effect on G(IC).
Peer review: yes
DOI: 10.1016/j.compositesa.2005.01.006
ISSN: 1359-835X
Appears in Collections:DEM - Artigos

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