The influence of water absorption on the damage mechanism of unidirectional and 2D woven CFRP.

Almudaihesh, Faisel, Grigg, Stephen, Pullin, Rhys ORCID: https://orcid.org/0000-0002-2853-6099, Holford, Karen ORCID: https://orcid.org/0000-0002-3239-4660 and Eaton, Mark ORCID: https://orcid.org/0000-0002-7388-6522 2019. The influence of water absorption on the damage mechanism of unidirectional and 2D woven CFRP. Presented at: 22nd International Conference on Composite Materials (ICCM22 2019), Melbourne, Australia, 11-16 August 2019. Proceedings of the 2019 International Conference on Compostie Materials. RMIT University,

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Abstract

This study presents the influence of water exposure on unidirectional, plain weave, and twill weave CFRP particularly in the interfacial region. Specimens were exposed to 70°C water for 40 days and tested using the short-beam method to evaluate their interlaminar strength. This was conducted with the use of Acoustic Emission and Video Strain Gauge (an optical strain measurement). Scanning Electron Microscope was also used in this study. Results show weight increase of specimens due to water exposure by 1%, 0.94%, and 0.99% for unidirectional, plain and, twill, respectively. Furthermore, significant reductions in the short-beam strengths were observed for aged specimens. Acoustic emission showed promising initial results which can help to distinguish between the different damage mechanisms of aged and unaged specimens further enhancing the understanding of crack formation prior to final interlaminar failure. In addition, matrix cracking, fibre/fibre detachment, and fibre/matrix cracks were observed in the Scanning Electron Microscope results.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	RMIT University
Related URLs:	Publisher
Date of First Compliant Deposit:	19 February 2021
Date of Acceptance:	1 April 2019
Last Modified:	04 Jan 2023 02:42
URI:	https://orca.cardiff.ac.uk/id/eprint/138588

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