Experimental study of the influence of ply orientation on DCB mode-I delamination behavior by using multidirectional fully isotropic carbon/epoxy laminates

M. S. Bin Mohamed Rehan, 1, * Jérôme Rousseau 2 Stéphane Fontaine 2 Xiaojing Gong 3
* Auteur correspondant
1 International Islamic University Malaysia [Kuala Lumpur]
2 DRIVE - Département de Recherche en Ingéniérie des Véhicules pour l'Environnement
3 ICA - Institut Clément Ader
Abstract : The influence of ply orientation on the resistance to mode I delamination of multidirectional composite laminates can be assessed by Double Cantilever Beam (DCB) tests. However, one difficulty is to uncouple the global and local effects due to the stacking sequence, which is necessary for a conclusive analysis. In the present work six multidirectional DCB specimens were designed so as to obtain an uncoupled fully isotropic elastic behavior, with the same properties for the entire laminate and the two sub laminates separated by the pre-crack at mid-plane. These specimens have different ply orientations, but their elastic properties are exactly the same. Hence differences in mode I delamination behavior are only due to local fiber orientation effects. Experimental results show that the measured toughness at the crack initiation decreases with both adjacent and sub-adjacent ply angles. During the crack propagation, the plateau value of the R-curve increases with the ply angle of adjacent plies. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords : Design Failure Toughness Specimens Delamination Fracture toughness Composites Identification Fracture Parameters Ply orientation DCB test Interfaces Stacking-Sequence Fully Isotropic Laminates
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01460759
Contributeur : Ub_drive Université de Bourgogne <>
Soumis le : mardi 7 février 2017 - 18:36:51
Dernière modification le : vendredi 10 janvier 2020 - 21:09:44

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UNIV-BOURGOGNE | CNRS | INSA-TOULOUSE | DRIVE | ICA | INSA-GROUPE | UNIV-TLSE3

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M. S. Bin Mohamed Rehan,, Jérôme Rousseau, Stéphane Fontaine, Xiaojing Gong. Experimental study of the influence of ply orientation on DCB mode-I delamination behavior by using multidirectional fully isotropic carbon/epoxy laminates. Composite Structures, Elsevier, 2017, 161, pp.1-7. ⟨10.1016/j.compstruct.2016.11.036 ⟩. ⟨hal-01460759⟩

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