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Lookup NU author(s): Dr George Kotsikos,
Emeritus Professor Terry Evans,
Dr Jack Hale,
Professor Geoff Gibson
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Acoustic emission testing (AE) has been used to evaluate the damage progression in a glass/polyester woven roving (0/90°) laminate under the combined effect of loading and preexposure in an aqueous environment. Four point bend tests to determine failure and flexural fatigue tests of as received and preexposed laminates have been carried out accompanied by acoustic emission recording. Environmental preexposure has been found to alter the damage progression mechanism in the polyester laminate from predominantly matrix cracking in the as-received condition to matrix cracking (increased matrix crack density) plus debonding and delamination after preexposure. Changes in AE parameters such as hit amplitude and duration were correlated with these changes in failure mode which are supported by microscopic investigation.
Author(s): Kotsikos G, Evans JT, Hale JM, Gibson AG
Publication type: Article
Publication status: Published
Journal: Materials Evaluation
ISSN (print): 0025-5327
Publisher: American Society for Nondestructive Testing