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Matrix cracking in polymeric composites laminates: Modelling and experiments

Katerelos, D.T.G., Kashtalyan, M., Soutis, C. and Galiotis, C. (2008) Matrix cracking in polymeric composites laminates: Modelling and experiments. Composites Science and Technology, 68 (12). pp. 2310-2317. ISSN 0266-3538

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Abstract

Composites ability to retain functionality in the presence of damage is a crucial safety and economic issue. Generally the first damage mode in composite laminates is matrix cracking, which affects the mechanical properties of the structure long before its load-bearing capacity is exhausted. In this paper, a detailed analysis of the effect of matrix cracking on the behaviour of cross-ply [0/90]s and unbalanced symmetric [0/45]s glass/epoxy laminates loaded statically in tension is performed. Theoretical predictions of stiffness reduction due to damage are based on the Equivalent Constraint Model (ECM), which takes into account concurrent matrix cracking in all plies of the laminate, although matrix cracking under consideration is developing only within the off-axis ply of the laminates. The longitudinal Young’s modulus predictions are compared to experimentally derived data obtained using laser Raman spectroscopy (LRS). The good agreement between predicted and measured values of the reduced longitudinal Young’s modulus validates the ECM model and proves that its basic assumptions are accurate. Thus, the predictions for all the mechanical properties by the ECM model are within a realistic range, while experimental evidence is required for further validation.

Item Type: Article
Copyright, Publisher and Additional Information: © 2008 Elsevier B.V. This is an author produced version of a paper published in Composites Science and Technology. Uploaded in accordance with the publisher's self archiving policy.
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Sherpa Assistant
Date Deposited: 28 Nov 2008 12:51
Last Modified: 08 Feb 2013 16:57
Published Version: http://dx.doi.org/10.1016/j.compscitech.2007.09.01...
Status: Published
Publisher: Elsevier B.V.
Refereed: Yes
Identification Number: 10.1016/j.compscitech.2007.09.013
URI: http://eprints.whiterose.ac.uk/id/eprint/4951

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