Hole-hole interaction in carbon fibre/epoxy laminates under uniaxial compression

C. Soutis, N. A. Fleck, P. T. Curtis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This paper describes the static compressive response of T800/924C carbon fibre/epoxy [(±45/02)3]s laminates containing a single or two circular holes. Penetrant-enhanced X-ray radiography, laminate deply and scanning electron microscopy are employed to observe damage initiation and propagation. Failure is due to 0° fibre microbuckling surrounded by delamination. For all geometries investigated, the microbuckled region initiates at the hole boundary at approximately 80% of the failure strength. The microbuckle band extends stably under increasing load before becoming unstable at a critical microbuckle length of 2-3 mm. The final fracture surface is almost perpendicular to the loading direction. A two-dimensional finite element analysis is used to study the interaction effect between a pair of 5 mm diameter holes as a function of hole spacing; for no interaction the hole centres should be placed at least four hole diameters apart. © 1991.
    Original languageEnglish
    Pages (from-to)31-38
    Number of pages7
    JournalComposites
    Volume22
    Issue number1
    Publication statusPublished - Jan 1991

    Keywords

    • composite materials
    • compressive strength
    • damage mechanisms
    • hole-hole interaction
    • holes
    • laminates

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