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 Mixed mode I + II interlaminar fracture of carbon/epoxy laminates
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/5227

title: Mixed mode I + II interlaminar fracture of carbon/epoxy laminates
authors: Pereira, A.B.
Morais, A.B. de
keywords: Polymer-matrix composites (PMCs)
Fracture toughness
Delamination
Finite element analysis (FEA)
issue date: 2008
publisher: Elsevier
abstract: This paper reports a study of the mixed mode I + II fracture of carbon/epoxy unidirectional and multidirectional specimens with symmetric, quasi-symmetric and markedly asymmetric legs. A beam model was developed for predicting the compliance and total strain energy release rate, G. Its predictions agreed well with three-dimensional finite element models and with experimental data of double cantilever beam, end-notched flexure and mixed-mode bending tests. The mode mix was determined from a virtual crack closure technique limit value analysis, in order to overcome ambiguity for delaminations between differently oriented plies. Initiation Gc values versus mode II ratio GII/G plots had practically identical shapes, showing a linear Gc increase with GII/G >= 25 %. Multidirectional specimens with quasi-symmetric and markedly asymmetric legs had similar Gc values.
URI: http://hdl.handle.net/10773/5227
ISSN: 1359-835X
publisher version/DOI: http://dx.doi.org/10.1016/j.compositesa.2007.10.013
source: Composites Part A: Applied Science and Manufacturing
appears in collectionsMEC - Artigos

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