Effects of Aging Temperature on Moisture Absorption of Perforated GFRP
This paper examines the effects of aging on the flexural stiffness and bending loading capacity of a perforated glass fiber-reinforced epoxy composite subjected to combined moisture and elevated temperature. Specimens, in the configuration of one-quarter of a perforated GFRP tube, were aged in 60% h...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/303014 |
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| Summary: | This paper examines the effects of aging on the flexural stiffness and bending loading
capacity of a perforated glass fiber-reinforced epoxy composite subjected to combined
moisture and elevated temperature. Specimens, in the configuration of one-quarter of a
perforated GFRP tube, were aged in 60% humidity and temperatures of 40, 60, and 80°C,
respectively. Moisture absorptions of the specimens were measured during the aging
process, and bending tests were conducted on the specimens after aging. The SEM
images were also captured to further examine the effects of the moisture absorption on
the aged specimens. The results indicated that the increase in the aging temperature reduced the diffusion
coefficient, thus inducing more moisture absorption by the composite and in turn causing more reduction in composite’s flexural stiffness and bending capacity. Moreover, the ability of Fick’s equation for predicting the moisture absorption rate in such perforated thin-walled composite configuration at various moisture contents and temperatures was also assessed. A semiempirical equation was developed and proposed by which the reduction of the stiffness in the perforated aged GFRP structures
could be predicted. |
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| ISSN: | 1687-8434 1687-8442 |