Fracture behaviour of fibre/polymer composites based on synthetic and natural fibres

Altamar, Rashed (2014) Fracture behaviour of fibre/polymer composites based on synthetic and natural fibres. [USQ Project]

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Abstract

In the current era, there are high demand to find alternative green and renewable, biodegradable products in several industrial and academic sectors. From the literature, natural fibres found to be a good and promising candidate to replace the synthetic fibres for mechanical and civil engineering applications. However, the literature recommends further understanding on the fracture behaviour of such materials since the main issue with the fibre composite is the crack propagation and the fracture weakness. In this work, bamboo fibres reinforced epoxy composites was fabricated. Moreover, glass fibre/epoxy material was fabricated to study the potential of using bamboo fibres. Fracture behaviour of the three materials was investigated and the mico-fracture mechanisms were categorized using scanning electron microscopy.
The current results revealed that bamboo fibres had decent fracture toughness value with 2.21 MPa m12 for 15 mm fibres length compared to the glass fibres which showed fracture toughness of 2.51 MPa m12. Increase in the fibre length exhibited significant influence on the polymer composite for both glass and bamboo fibres in the glass or bamboo/epoxy composites, i.e. the longer the fibre is better the fracture toughness. Micro-fracture of the composites showed different features for ach composites. In the glass fibres/epoxy composites, the fractures were predominant by shear (brittle fracture) in both resinous and fibrous regions associated with pull out and detachments of fibres. On the other hand, bamboo/epoxy micrographs showed breakage in the fibres and brittle nature in the resinous regions associated with good adhesion of the fibres with the matrix. In other words, the bamboo fibres exhibited better interaction with the epoxy compared to the glass fibre


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Mechanical Engineering (BENG) project.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Supervisors: Yousif, Belal
Date Deposited: 02 Jul 2015 01:49
Last Modified: 14 Oct 2015 06:57
Uncontrolled Keywords: fracture behaviour, fibre reinforce polymer, bamboo fibre
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
URI: http://eprints.usq.edu.au/id/eprint/27298

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