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Acoustic emission from graphite/epoxy composite laminates with special reference to delamination

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Abstract

The primary object of this study was to investigate acoustic emission (AE) techniques for the detection of progressive damage in graphite/epoxy composite laminates. The AE signals were monitored during the uniaxial loading of symmetrical eight-ply laminates with three different stacking sequences. The peak value and the weighted cumulative count were determined as a function of applied axial stress. Both the peak value data and the cumulative count data are characterized by a pronounced increase at first-ply failure as determined by the Tsai-Hill anisotropic strength criterion, followed by a continuous emission until delamination or final fracture occurs. At the onset of delamination, a pronounced deflection was noted in the accumulated AE signal. Plastic deformation of the matrix generated no significant AE.

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Authors and Affiliations

  1. The Aeronautical Research Institute of Sweden, S-161 11, Bromma, Sweden

    Leif Carlsson & Bo Norrbom

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  1. Leif Carlsson
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  2. Bo Norrbom
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Carlsson, L., Norrbom, B. Acoustic emission from graphite/epoxy composite laminates with special reference to delamination. J Mater Sci 18, 2503–2509 (1983). https://doi.org/10.1007/BF00541857

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  • DOI: https://doi.org/10.1007/BF00541857

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