Volume 7, Issue 3 (September 1985)

    Long-Term Characteristics of Fiber-Reinforced Plastic Under Mechanical Stress and an Acidic Environment

    CODEN: CTROAD

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    Abstract

    Glass fiber-reinforced plastic (GRP) rods are used in the manufacture of composite insulators for high voltage transmission lines. Should they come in contact with an acid solution their strength can be drastically reduced and the insulator may be unable to perform. Bending and tension tests are used to evaluate the long-term performance of GRP in contact with dilute sulfuric acid. The crack propagation velocity da/dt depends on the stress intensity factor KI. In both bending and tension tests the crack growth velocity is a linear function of KIn where the exponent n = 3.1. In both bending and tension tests, the total fracture time may be separated into an incubation time t1 and a propagation time t2 given by tf = t1 + t2 = (C1/pm) + [C2H( )/pn] where p is applied load, C1, C2, m, and n are constants, and H( ) is a constant that can be calculated from the initial crack length and the critical crack length.


    Author Information:

    De Tourreil, C
    Research engineer and senior researcher, Hydro Quebec Research Institute, Varennes, Quebec

    Koyama, M
    Research engineer and senior researcher, Hydro Quebec Research Institute, Varennes, Quebec


    Stock #: CTR10304J

    ISSN: 0884-6804

    DOI: 10.1520/CTR10304J

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    Author
    Title Long-Term Characteristics of Fiber-Reinforced Plastic Under Mechanical Stress and an Acidic Environment
    Symposium , 0000-00-00
    Committee D30