The effect of fibre length on fracture toughness and notched strength of short carbon fibre/epoxy composites

S. A. Hitchen, S. L. Ogin, P. A. Smith, C. Soutis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The effect of radius of curvature on the tensile notched strength of random short carbon fibre/epoxy composites containing 1, 5 and 15 mm length fibres is studied. The strength of all laminates showed a sensitivity to the radius of curvature, with the tensile strength decreasing at smaller radii of curvature. A model is developed to predict notched strength based on assumed evolution and propagation of damage from the tip of the notch. The predictions of the model depend principally on two material properties: the unnotched tensile strength and fracture toughness. Reasonable agreement is achieved between the predicted notched strength and experimental data. © 1994.
    Original languageEnglish
    Pages (from-to)407-413
    Number of pages6
    JournalComposites
    Volume25
    Issue number6
    Publication statusPublished - Jul 1994

    Keywords

    • fibre length
    • fracture toughness
    • model
    • notch curvature
    • notched tensile strength
    • short-fibre composites

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