Impact of non-hookean behaviour on mechanical performance of hybrid composites

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    Abstract

    Hybrid composites, based on unidirectional fibres of carbon and glass, in an epoxy matrix have been used to investigate the possibility of a hybrid effect. The hybrid effect is observed experimentally by values for both composite strength and composite failure strain, which are increased compared to a simple model. The introduction of an increase of the failure strain of the carbon fibre part (the “fibre”) of the composite, described by a factor H for the increase of the failure strain, results in theoretical curves for strength and failure strain, which are in general agreement with the experimental data. For the present hybrid composites a value of 푯 = ퟏ.ퟐퟐ is required, meaning a positive hybrid effect on “fibre” strain of 22%. It is thus concluded that the simple concept of a hybrid factor H for the fibre failure strain can describe the observed hybrid effect satisfactorily.
    Original languageEnglish
    Title of host publicationProceedings of the 20th International Conference on Composite Materials
    Number of pages9
    PublisherICCM20 Secretariat
    Publication date2015
    Publication statusPublished - 2015
    Event20th International Conference on Composite Materials - Copenhagen, Denmark
    Duration: 19 Jul 201524 Jul 2015
    Conference number: 20
    http://iccm20.org/

    Conference

    Conference20th International Conference on Composite Materials
    Number20
    Country/TerritoryDenmark
    CityCopenhagen
    Period19/07/201524/07/2015
    Internet address

    Keywords

    • Carbon fibres
    • Glass fibres
    • Hybrid composites
    • Stress strain curves
    • Modelling

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