Influence of water absorption on Mode I delamination in carbon/epoxy composite laminates
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...
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| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/63414/ http://www.ums.edu.my/v5/index.php/en/42-info/seminars/1976-mechanical-engineering-and-advanced-materials |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | 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. |
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