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Proceedings Paper

Damage assessment in composites with embedded optical fiber sensors
Author(s): Raymond M. Measures; Kexing Liu; Michel LeBlanc; Keith McEwen; K. Shankar; Rod C. Tennyson; Suzanne M. Ferguson
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Paper Abstract

Damage assessment within composite structural components can be undertaken with embedded optical fiber sensors in two very different ways: the optical fibers can be damage sensitized so they fracture when the composite is critically loaded or they can be made into very sensitive strain sensors that can detect acoustic energy released when the composite is subjected to sufficient load to cause internal damage. We shall report on our latest research for these two approaches. This includes the results of impact tests on the first full scale aircraft composite leading edge instrumented with a 'damage assessment system' comprising a multilayered, embedded grid of 250 damage sensitized optical fibers. We shall also report on the extension of this work to glass fiber/epoxy shells, and the first correlation of acoustic emission signals (detected by embedded interferometric fiber optic sensors) to specific cracks and delaminations within Kevlar/epoxy specimens.

Paper Details

Date Published: 1 October 1991
PDF: 11 pages
Proc. SPIE 1489, Structures Sensing and Control, (1 October 1991); doi: 10.1117/12.46590
Show Author Affiliations
Raymond M. Measures, Univ. of Toronto Institute for Aerospace Studies (Canada)
Kexing Liu, Univ. of Toronto Institute for Aerospace Studies (Canada)
Michel LeBlanc, Univ. of Toronto Institute for Aerospace Studies (Canada)
Keith McEwen, Univ. of Toronto Institute for Aerospace Studies (Canada)
K. Shankar, Univ. of Toronto Institute for Aerospace Studies (Canada)
Rod C. Tennyson, Univ. of Toronto Institute for Aerospace Studies (Canada)
Suzanne M. Ferguson, Univ. of Toronto Institute for Aerospace Studies (Canada)


Published in SPIE Proceedings Vol. 1489:
Structures Sensing and Control
John Breakwell; Vijay K. Varadan, Editor(s)

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