University of Hertfordshire

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Original languageEnglish
JournalScience and Engineering of Composite Materials
Publication statusAccepted/In press - 15 Sep 2019


Fibre hybridisation in composite structures, be it interlaminar or intralaminar is a promising strategy to control the stiffness and energy absorption characteristics, i.e. with the combination of two or more kinds of fibre reinforcements; the hybrid structure could offer a better balance of appropriate mechanical properties tailored to specific application. Carbon fibre is extremely strong and more expensive compared to glass fibre, and to overcome the challenges of replacing conventional materials (e.g. metals) in respect of the appropriate mechanical properties and cost, hybridisation seems to be a good approach. In this study interlaminar hybrid composites were produced with carbon and glass fibres as reinforcement in epoxy matrix; and non-hybrid samples of carbon fibre reinforcement. The plies were stacked manually to the required configuration and cured in the autoclave under a controlled condition. All the composite plates were tested under quasi-static loading using Tinius Olsen instrumented universal test machine and the results obtained were plotted as load – displacement graphs for loading and un-loading; the slope of the loading curve taken as estimate for the bending stiffness. The non-hybrid samples produce with only carbon fibres as reinforcement displayed higher bending stiffness and the introduction of hybridisation relatively reduced the value of the bending stiffness. Hence, the process of hybridisation could be used to modify a couple of the characteristics of a composite structure including the natural frequencies and damping properties. Also, micro-photograph of the damaged section was taken and fibre/matrix interfacial debonding, delamination and matrix crack modes of energy dissipation were revealed.

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