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On fibre debonding effects and the mechanism of transverse-ply failure in cross-ply laminates of glass fibre/thermoset composites

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Abstract

The mechanism of transverse-ply failure in cross-ply laminates of glass fibre thermoset composites has been investigated. It is shown that fibre debonding initiates failure, the debonds subsequently joining up to form a transverse crack nucleus. In the epoxy system investigated fibre debonding causes an observable whitening effect and small modulus change; this effect is reversible in that rebonding can be brought about by further heat treatment. It is shown that in the case of the polyester system the larger thermal strains introduced during the curing cycle cause debonding of the composite and therefore the whitening effects are not observed on application of load. Simple models for the prediction of the observed effect of glass fibre volume fraction on transverse failure strain are proposed.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Technology, University of Surrey, Guildford, England

    J. E. Bailey & A. Parvizi

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  1. J. E. Bailey
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  2. A. Parvizi
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Bailey, J.E., Parvizi, A. On fibre debonding effects and the mechanism of transverse-ply failure in cross-ply laminates of glass fibre/thermoset composites. J Mater Sci 16, 649–659 (1981). https://doi.org/10.1007/BF02402782

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  • DOI: https://doi.org/10.1007/BF02402782

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