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Matrix-graded and fibre-steered composites to tackle stress concentrations

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)72-80
Number of pages9
JournalComposite Structures
Volume207
Early online date18 Sep 2018
DOIs
DateAccepted/In press - 17 Sep 2018
DateE-pub ahead of print - 18 Sep 2018
DatePublished (current) - Jan 2019

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.

    Research areas

  • Damage tolerance, Graded materials, Liquid Resin Printing, Multi-matrix composites

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via Elsevier at https://www.sciencedirect.com/science/article/pii/S0263822318313126 . Please refer to any applicable terms of use of the publisher.

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    Licence: CC BY

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