Matrix-graded and fibre-steered composites to tackle stress concentrations
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Published version
Author(s)
Type
Journal Article
Abstract
This paper studies the feasibility of improving structural performance of composites in the presence of stress concentrators. Matrix grading through local deposition of additive-enhanced matrices and fibre steering by varying fibrous architecture are examined independently and in combination on a glass-fibre triaxial braided composite subjected to open hole tensile test. Stiffened and toughened matrices were incorporated through precise point-wise injections of liquid reactive resin into dry preforms (Liquid Resin Printing). Fibre steering was implemented by varying the braiding angle along the length of the braided sleeve. It has been shown that these novel forms of architecture modification enable a significant improvement in composite strength through a variety of deformation mechanisms. This includes local stiffening of composite in the direct vicinity of the stress concentrator and damage accumulation away from the stress concentrators. The experimental observations are explained by using simple finite-element models.
Date Issued
2019-01-01
Date Acceptance
2018-09-17
Citation
Composite Structures, 2019, 207, pp.72-80
ISSN
0263-8223
Publisher
Elsevier
Start Page
72
End Page
80
Journal / Book Title
Composite Structures
Volume
207
Copyright Statement
© 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Sponsor
Engineering & Physical Science Research Council (E
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000449690600007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
121041 - EP/P006701/1
Subjects
Science & Technology
Technology
Materials Science, Composites
Materials Science
Graded materials
Liquid Resin Printing
Damage tolerance
Multi-matrix composites
LIQUID RESIN PRINT
STRENGTH
Publication Status
Published
OA Location
https://research-information.bris.ac.uk/ws/portalfiles/portal/176434947/1_s2.0_S0263822318313126_main.pdf
Date Publish Online
2018-09-18