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Fragmentation of Beaded Fibres in a Composite

The fibre–matrix interface plays an important role in the overall mechanical behaviour of a fibre-reinforced composite, but the classical approach to improving the interface through chemical sizing is bounded by the materials’ properties. By contrast, structural and/or geometrical modification of th...

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Autores principales: Rodricks, Carol Winnifred, Greenfeld, Israel, Fiedler, Bodo, Wagner, Hanoch Daniel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839112/
https://www.ncbi.nlm.nih.gov/pubmed/35160836
http://dx.doi.org/10.3390/ma15030890
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author Rodricks, Carol Winnifred
Greenfeld, Israel
Fiedler, Bodo
Wagner, Hanoch Daniel
author_facet Rodricks, Carol Winnifred
Greenfeld, Israel
Fiedler, Bodo
Wagner, Hanoch Daniel
author_sort Rodricks, Carol Winnifred
collection PubMed
description The fibre–matrix interface plays an important role in the overall mechanical behaviour of a fibre-reinforced composite, but the classical approach to improving the interface through chemical sizing is bounded by the materials’ properties. By contrast, structural and/or geometrical modification of the interface may provide mechanical interlocking and have wider possibilities and benefits. Here we investigate the introduction of polymer beads along the interface of a fibre and validate their contribution by a single fibre fragmentation test. Using glass fibres and the same epoxy system for both matrix and beads, an increase of 17.5% is observed in the interfacial shear strength of the beaded fibres compared to fibres with no polymer beads. This increase should lead to a similar improvement in the strength and toughness of a beaded fibre composite when short fibres are used. The beads were also seen to stabilise the fragmentation process of a fibre by reducing the scatter in fragment density at a given strain. A case could also be made for a critical beads number—4 beads in our experimental system—to describe interfacial shear strength, analogous to a critical length used in fibre composites.
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spelling pubmed-88391122022-02-13 Fragmentation of Beaded Fibres in a Composite Rodricks, Carol Winnifred Greenfeld, Israel Fiedler, Bodo Wagner, Hanoch Daniel Materials (Basel) Article The fibre–matrix interface plays an important role in the overall mechanical behaviour of a fibre-reinforced composite, but the classical approach to improving the interface through chemical sizing is bounded by the materials’ properties. By contrast, structural and/or geometrical modification of the interface may provide mechanical interlocking and have wider possibilities and benefits. Here we investigate the introduction of polymer beads along the interface of a fibre and validate their contribution by a single fibre fragmentation test. Using glass fibres and the same epoxy system for both matrix and beads, an increase of 17.5% is observed in the interfacial shear strength of the beaded fibres compared to fibres with no polymer beads. This increase should lead to a similar improvement in the strength and toughness of a beaded fibre composite when short fibres are used. The beads were also seen to stabilise the fragmentation process of a fibre by reducing the scatter in fragment density at a given strain. A case could also be made for a critical beads number—4 beads in our experimental system—to describe interfacial shear strength, analogous to a critical length used in fibre composites. MDPI 2022-01-24 /pmc/articles/PMC8839112/ /pubmed/35160836 http://dx.doi.org/10.3390/ma15030890 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodricks, Carol Winnifred
Greenfeld, Israel
Fiedler, Bodo
Wagner, Hanoch Daniel
Fragmentation of Beaded Fibres in a Composite
title Fragmentation of Beaded Fibres in a Composite
title_full Fragmentation of Beaded Fibres in a Composite
title_fullStr Fragmentation of Beaded Fibres in a Composite
title_full_unstemmed Fragmentation of Beaded Fibres in a Composite
title_short Fragmentation of Beaded Fibres in a Composite
title_sort fragmentation of beaded fibres in a composite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839112/
https://www.ncbi.nlm.nih.gov/pubmed/35160836
http://dx.doi.org/10.3390/ma15030890
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