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 Mode I interlaminar fracture of carbon/epoxy multidirectional laminates
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/5272

title: Mode I interlaminar fracture of carbon/epoxy multidirectional laminates
authors: Pereira, A.B.
Morais, A.B. de
keywords: Polymer-matrix composites (PMCs)
Fracture toughness
Finite element analysis (FEA)
issue date: 2004
publisher: Elsevier
abstract: This paper reports an experimental study on the mode I interlaminar fracture of carbon/epoxy multidirectional specimens with 0degrees/thetadegrees delaminating interfaces. The suitability of the double cantilever beam (DCB) specimens was first evaluated in three-dimensional (3D) finite element (FE) analyses, which addressed possible elastic couplings associated problems. In the DCB tests, extensive fibre bridging occurred as a result of transverse cracking of theta-oriented plies. This complex damage morphology caused pronounced R-curves with artificially high final values of the critical strain energy release rate, G(1c). In these circumstances, G(1c) values of initiation from the film generated starter crack were considered the only true interlaminar properties. Moreover, they were found to be fairly independent of the delaminating interface, a result that could be interpreted in additional FE analyses concerning the interlaminar stress field ahead of the crack tip.
URI: http://hdl.handle.net/10773/5272
ISSN: 0266-3538
publisher version/DOI: http://dx.doi.org/10.1016/j.compscitech.2004.03.001
source: Composites Science and Technology
appears in collectionsMEC - Artigos

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