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Influence of water absorption on Mode I delamination in carbon/epoxy composite laminates

Wong, K. J. and Johar, M. and Gong, X. J. and Aivazzadeh, S. and Tamin, M. N. (2015) Influence of water absorption on Mode I delamination in carbon/epoxy composite laminates. In: International Conference on Mechanical Engineering and Advanced Materials (ICME-AM 2015), 3-4 Dec, 2015, Sabah, Malaysia.

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Abstract

This paper discusses the effects of demineralised water immersion on Mode I delamination behaviour of a carbon/epoxy composite. Tests were carried out at moisture contents of M = 0%,3%,5% and6%using double cantilever beam specimens. Results showed that compared to the dry condition, Mode I fracture toughness, G,C was slightly increased by 9% at M = 3%, bot dropped at M = 5% and 6%, with 6% and 17% reduction, respectively, Back calculated modulus showed that the values were varied within 20% compared to the tensile modulus except for M = 5% and 6% calculated by compliance based beam method. The normalised G,C was then fitted using a proposed residual toughness model. Furthermore, R-curve was observed after ageing, with the plateau value independent on the moisture content. Finally, scanning e1ectron micrographs revealed that matrix plasticisation,fibre debonding and microcracking were observed in aged specimens.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:water absorption, residual toughness model
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:63414
Deposited By: Fazli Masari
Deposited On:30 May 2017 03:26
Last Modified:30 May 2017 03:26

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