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Fragmentation of beaded fibres in a composite
Citation Link: https://doi.org/10.15480/882.4151
Publikationstyp
Journal Article
Publikationsdatum
2022-01-24
Sprache
English
Enthalten in
Volume
15
Issue
3
Article Number
890
Citation
Materials 15 (3): 890 (2022)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
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.
Schlagworte
interface
beaded fibre composite
structural modification
mechanical interlocking
fragmentation test
DDC Class
540: Chemie
600: Technik
620: Ingenieurwissenschaften
Publication version
publishedVersion
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materials-15-00890-v4.pdf
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5.36 MB
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