Journal Published Online: 01 September 1985
Volume 7, Issue 3

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



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

Koyama, M
Hydro Quebec Research Institute, Varennes, Quebec, Canada
De Tourreil, C
Hydro Quebec Research Institute, Varennes, Quebec, Canada
Pages: 7
Price: $25.00
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Stock #: CTR10304J
ISSN: 0884-6804
DOI: 10.1520/CTR10304J