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Fracture behaviour of rubber- and silica nanoparticle-toughened glass fibre composites under static and fatigue loading

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Title: Fracture behaviour of rubber- and silica nanoparticle-toughened glass fibre composites under static and fatigue loading
Authors: Awang Ngah, S
Taylor, AC
Item Type: Journal Article
Abstract: The crosslinked polymers used in fibre composites are very brittle, and require toughening for structural applications. Research over many years has increased the fracture energy, but the fatigue resistance of these toughened polymers is very poor, limiting the optimisation of structures. This work reports the first successful use of hybrid toughening to increase both the quasi-static interlaminar fracture energy, GIC, and the fatigue threshold strain-energy release-rate, Gth. Amine-cured epoxy glass-fibre composites were toughened using carboxyl-terminated butadiene-acrylonitrile (CTBN) which forms micron-sized rubber particles and 20 nm-diameter silica nanoparticles. The toughening mechanisms were identified as cavitation of rubber particles and debonding for the silica nanoparticles, followed by plastic void growth. The CTBN greatly increases GIC, and the nanoparticles increase Gth. Combining both particles as a hybrid has a synergistic effect on the fatigue resistance. This demonstrates the effectiveness of hybrid toughening, enabling the design of optimised composites by combining micro- and nanoparticles.
Issue Date: 1-Jun-2018
Date of Acceptance: 18-Feb-2018
URI: http://hdl.handle.net/10044/1/57330
DOI: 10.1016/j.compositesa.2018.02.028
ISSN: 1359-835X
Publisher: Elsevier
Start Page: 239
End Page: 256
Journal / Book Title: Composites Part A: Applied Science and Manufacturing
Volume: 109
Issue: 1
Copyright Statement: © 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Engineering, Manufacturing
Materials Science, Composites
Engineering
Materials Science
Glass fibres
Nanoparticles
Fatigue
Fracture
I INTERLAMINAR FRACTURE
MODE-I
MECHANICAL-PROPERTIES
EPOXY NANOCOMPOSITES
NANO-PARTICLES
PART 2
TOUGHNESS
DELAMINATION
IMPROVEMENT
MORPHOLOGY
Materials
0901 Aerospace Engineering
0912 Materials Engineering
0913 Mechanical Engineering
Publication Status: Published
Online Publication Date: 2018-03-03
Appears in Collections:Faculty of Engineering
Mechanical Engineering