Effects of Different Relative Humidities on Flax Fibers prior to Manufacturing Their Composites Based on the Shear Response

Moudood, Abdul and Rahman, Anisur and Ochsner, Andreas and Islam, Md Mainul and Ali, Mohammad Yeakub and Francucci, Gaston (2020) Effects of Different Relative Humidities on Flax Fibers prior to Manufacturing Their Composites Based on the Shear Response. Advances in Materials Science and Engineering, 2020:4785970. pp. 1-7. ISSN 1687-8434

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The moisture absorption behavior of flax fiber-reinforced epoxy composites is deliberated to be a serious issue. This property restricts their usage as outdoor engineering structures. Therefore, this study provides an investigation of moisture in flax fibers on the performance of the flax/epoxy composite materials based on their shear responses. The ±45° aligned flax fibers exposed to different relative humidities (RH) and the vacuum infusion process was used to manufacture the composite specimens. The optimum shear strength (40.25 ± 0.75 MPa) was found for the composites manufactured with 35% RH-conditioned flax fibers, but the shear modulus was reduced consistently with increasing RH values. Although shear strength was increased because of fiber swelling with increased moisture absorption rate until 35% RH environments with good microstructures, nonetheless, strength and modulus both started to decrease after this range. A very poor microstructure has been affirmed by the SEM images of the composite samples conditioned at 90% RH environments.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 03 Sep 2020 06:54
Last Modified: 14 Sep 2020 01:13
Uncontrolled Keywords: Flax fiber composites, Shear response, Microstructure, Mechanical testing, Relative humidity
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8604 Leather Products, Fibre Processing and Textiles > 860403 Natural Fibres, Yarns and Fabrics
Identification Number or DOI: https://doi.org/10.1155/2020/4785970
URI: http://eprints.usq.edu.au/id/eprint/39248

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