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Environmentally enhanced fatigue damage in glass fibre reinforced composites characterized by acoustic emission

Lookup NU author(s): Dr George Kotsikos, Emeritus Professor Terry Evans, Professor Geoff Gibson, Dr Jack Hale

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Abstract

A series of tests has been conducted to investigate the effect of sea water absorption on fatigue damage accumulation in a glass fibre reinforced polyester laminate of the type widely used in the marine and offshore industries, using four-point bend flexural loading to ensure peak strain in the outer layers of the material most subject to seawater absorption. Pre-exposure was found to reduce the flexural strength and enhance damage accumulation in fatigue by stimulating matrix cracking, fibre debonding and delamination. Acoustic emission (AE) was used to characterize damage accumulation. These results were found to correlate well with independent measurements of changing bending stiffness and with microstructural observations of the damaged sections.

Publication metadata

Author(s): Kotsikos G, Evans JT, Gibson AG, Hale JM

Publication type: Article

Publication status: Published

Journal: Composites Part A: Applied Science and Manufacturing

Year: 2000

Volume: 31

Issue: 9

Pages: 969-977

ISSN (print): 1359-835X

ISSN (electronic):

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/S1359-835X(00)00014-2

DOI: 10.1016/S1359-835X(00)00014-2

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