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Moisture Effect on Properties of Out-of-Autoclave Laminates with Different Void Content

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Moisture Effect on Properties of Out-of-Autoclave Laminates with Different Void Content

Bayatpour, Afshin and Hojjati, Mehdi (2020) Moisture Effect on Properties of Out-of-Autoclave Laminates with Different Void Content. International Journal of Composite Materials, 10 (1). pp. 1-9. ISSN 2166-4919

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Official URL: https://doi.org/10.5923/j.cmaterials.20201001.01

Abstract

Fabrication of large structures using out-of-autoclave prepreg materials will lead to a great amount of savings in manufacturing costs. In the out-of-autoclave processing method, the presence of voids inside the laminate has been an issue due to the lack of high pressure during manufacturing. This study aims primarily to observe the moisture absorption response of composite samples containing different levels of void. By changing the vacuum level inside the bag during the manufacturing process, three different unidirectional laminates at three levels of void have been manufactured. After immersing the samples in warm water at 60°C for about one year, the moisture absorption level was monitored and then diffusion coefficients were calculated using Fick’s law. Results show that the moisture absorption coefficient changes by %8 within the experimental range of void contents. The mechanical behaviour of these laminates has been studied at four different moisture levels by performing dynamic mechanical analysis (DMA) and short beam shear tests. Empirical results indicate that, in general, interlaminar shear strength and glass transition temperature decrease by moisture build-up inside the samples. DiBenedetto equation is proposed to make a correlation between the moisture content and glass transition temperature.

Divisions:Concordia University > Research Units > Concordia Centre for Composites
Item Type:Article
Refereed:Yes
Authors:Bayatpour, Afshin and Hojjati, Mehdi
Journal or Publication:International Journal of Composite Materials
Date:2020
Funders:
  • Natural Sciences and Engineering Research Council of Canada (NSERC)
Digital Object Identifier (DOI):10.5923/j.cmaterials.20201001.01
Keywords:Out-of-autoclave materials, Moisture absorption, Moisture diffusivity
ID Code:986438
Deposited By: JOSHUA CHALIFOUR
Deposited On:14 Feb 2020 19:50
Last Modified:14 Feb 2020 19:54
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