Monitoring Fatigue Damage in CFRP Using Acoustic Emission and Radiographic Techniques

    Published: Jan 1985

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    Tension-tension fatigue tests (R = 0.05) have been performed on quasiisotropic (0/±45/90)s graphite/epoxy specimens. Results from the nondestructive monitoring of damage initiation and growth using both acoustic emission (AE) and X-ray radiography are presented. Damage development in the form of transverse cracking in the 90° plies and delamination at the −45/90 interfaces could be detected using both techniques. This shows that AE could be used as a nondestructive test method for detecting the onset and growth of transverse cracking and delamination in graphite/epoxy specimens.

    Scanning electron microscopy was used for fractographic investigation of the delaminated surfaces.


    composite materials, tension-tension fatigue, transverse cracking, delamination, nondestructive testing, acoustic emission, X-ray radiograph, fractography

    Author Information:

    C-G, Gustafson
    The Swedish Plastics and Rubber Institute, Sundsvall,

    RB, Seldén
    The Swedish Plastics and Rubber Institute, Sundsvall,

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP36319S

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