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Fracture mechanisms and failure analysis of carbon fibre/toughened epoxy composites subjected to compressive loading

Jumahat, A., Soutis, C., Jones, F.R. and Hodzic, A. (2010) Fracture mechanisms and failure analysis of carbon fibre/toughened epoxy composites subjected to compressive loading. Composite Structures, 92 (2). pp. 295-305. ISSN 0263-8223

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Abstract

This study investigates the failure mechanisms of unidirectional (UD) HTS40/977-2 toughened resin composites subjected to longitudinal compressive loading. A possible sequence of failure initiation and propagation was proposed based on SEM and optical microscopy observations of failed specimens. The micrographs revealed that the misaligned fibres failed in two points upon reaching maximum micro-bending deformation and two planes of fracture were created to form a kink band. Therefore, fibre microbuckling and fibre kinking models were implemented to predict the compressive strength of LID HTS40/977-2 composite laminate. The analysis identified several parameters that were responsible for the microbuckling and kinking failure mechanisms. The effects of these parameters on the compressive strength of the LID HTS40/977-2 composite systems were discussed. The predicted compressive strength using a newly developed combined modes model showed a very good agreement to the measured value (c) 2009 Elsevier Ltd. All rights reserved

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 Elsevier. This is an author produced version of a paper subsequently published in Composite Structures. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Polymer-matrix composites (PMC); Analytical modelling; Carbon fibre reinforced polymer (CFRP) composites; Compressive strength; Failure analysis
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 24 Nov 2009 15:22
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1016/j.compstruct.2009.08.010
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.compstruct.2009.08.010
URI: http://eprints.whiterose.ac.uk/id/eprint/10197

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