Overbraiding of Pultruded Rods for Hierarchical Composites

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)


Hierarchical advanced composites using pultruded rods as a component are under development. Unlike traditional ply based composites, using rods as a building block makes the composite intrinsically three dimensional, opening up a new design space. Rods, consisting of highly aligned carbon fibres in an epoxy matrix, are used to form larger structures with a second matrix. Inspired by nature, the hierarchical composites will incorporate structure at a range of different length scales intended to improve the performance of the composite under compression.

Overbraiding is considered a promising option at both the rod and structural member scales following results of earlier work which showed an improvement in compressive performance when a structural member is overwound, due to the radial compression from the overwind. This paper discusses manufacturing challenges in overbraiding small diameter (<1 mm) pultruded rods, including the achievable lay length and braid angle, using a circular maypole microbraider. A novel ‘fuzzy carbon’ overbraid concept is presented, with potential to improve shear support in the matrix region surrounding the rod.
Original languageEnglish
Title of host publicationProceedings of the 23rd International Conference on Composite Materials
Number of pages8
Publication statusPublished - 13 Feb 2024
Event23rd International Conference on Composite Materials - Belfast, United Kingdom
Duration: 30 Jul 20234 Aug 2023


Conference23rd International Conference on Composite Materials
Abbreviated titleICCM 23
Country/TerritoryUnited Kingdom
Internet address


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    Trask, R. S.


    Project: Research, Parent

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