Effects of fiber orientation of adjacent plies on the mode I crack propagation in a carbon-epoxy laminates

Mohamed Rehan, Muhammad Saifuddin and Rousseau, Jerome and Xiao-Jing, Gong and Guillaumat, Laurent and Mohamed Ali, Jaafar Syed (2011) Effects of fiber orientation of adjacent plies on the mode I crack propagation in a carbon-epoxy laminates. Procedia Social and Behavioral Sciences, 10. pp. 3179-3184. ISSN 1877-0428

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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 of the difficulties associated with such a study is the change in overall elastic parameters occurring when modifying local ply orientations. The present work uses laminates with special stacking sequences allowing for isolating the orientation parameter. Multidirectional DCB specimens were designed so as to obtain an uncoupled quasi isotropic and quasi-homogeneous elastic behavior, with the same properties for the entire laminate and the two sub laminates separated by the pre crack at mid-plane. The results show that the toughness in term of GIC is slightly affected by the variation of ply orientations at the crack interface. The differences are more pronounced in the crack propagation behavior after the initiation point. Even with the same orientation at the crack interface, different subsequent ply orientations can also lead to different crack resistance behavior.

Item Type:	Article (Journal)
Additional Information:	4262/21764
Uncontrolled Keywords:	Fracture toughness, Delamination, DCB test, Ply orientation, QIQH laminates
Subjects:	UNSPECIFIED
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Nur' Aini Abu Bakar
Date Deposited:	06 Mar 2012 09:07
Last Modified:	06 May 2012 18:51
URI:	http://irep.iium.edu.my/id/eprint/21764

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