STP1156: Evaluation of Impact Damage in Composite Materials Using Acoustic Emission

    Bolduc, M
    Defense scientist, Defence Research Establishment Valcartier, Courcelette, Quebec

    Roy, C
    Professorfaculty, Sherbrooke University, Sherbrooke, Quebec

    Pages: 12    Published: Jan 1993


    Abstract

    The Defence Research Establishment, Valcatier (DREV) has been studying the application of composite materials for use in a lightweight anti-tank recoilless gun. Since thermoset resins are very sensitive to impact, it is important to determine the severity of damage using a nondestructive technique in order to establish the serviceability of the tube.

    Acoustic emission (AE) was identified as a very promising method to measure the level of damage accumulation due to low-velocity impact, and a study was undertaken. The experimental program consisted of impacting 28 of 36 tubes with energies varying from 3 to 18 J. These tubes, fabricated by a wet winding process using carbon fiber/epoxy resin, were 25.4 cm long, and had a 9-cm internal diameter and a 3.6-mm wall thickness. The winding angle was ±71°. The AE was measured while pressurizing these tubes to rupture. Results indicate the potential of acoustic emission as a means of estimating the serviceability of a composite tube.

    Keywords:

    acoustic emission, filament wound tube, carbon fiber, epoxy resin, low-velocity impact


    Paper ID: STP24728S

    Committee/Subcommittee: D30.02

    DOI: 10.1520/STP24728S


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