STP1077: Acoustic Emission Technology Using Multi-Parameter Analysis of Waveform and Application to GFRP Tensile Tests

    Yamaguchi, K
    Professor, research assistant, former graduate students, the Institute of Industrial Science, University of Tokyo, Tokyo,

    Oyaizu, H
    Professor, research assistant, former graduate students, the Institute of Industrial Science, University of Tokyo, Tokyo,

    Johkaji, J
    Professor, research assistant, former graduate students, the Institute of Industrial Science, University of Tokyo, Tokyo,

    Kobayashi, Y
    Professor, research assistant, former graduate students, the Institute of Industrial Science, University of Tokyo, Tokyo,

    Pages: 23    Published: Jan 1991


    Abstract

    Advanced acoustic emission instrumentation systems which can use multi-parameter data obtained by wave-envelope processing of all detected AE's have been developed. The systems were applied to different experiments such as fracture-monitoring of metal-structures and testing of materials. New parameters such as energy moments and zero crossing number were used together with conventional parameters and showed the usefulness for waveform analysis and source classification. In tensile tests of GFRP, the results indicated the high identification possibility, on failure modes such as fiber-debundling, matrix-cracking and fiber-breakage. The performance of the advanced systems can be considered more powerful for material evaluation than that of usual systems depending on conventional AE parameters such as peak amplitude and event count, etc.

    Keywords:

    acoustic emission, signal processing, waveform parameters, fracture behaviors, FRP


    Paper ID: STP19089S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP19089S


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