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Proceedings Paper

In-Service Characterization Of Composite Matrices With An Embedded Fluorescence Optrode Sensor
Author(s): S. D. Schwab; R. L. Levy
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Paper Abstract

The properties and durability of polymeric matrix composites are affected by the fabrication process and by the effects of their service environment. A dual-role, fluorescence based fiber-optic sensor was developed to monitor the composite curing process and subsequently to monitor the sorbed water content of the cured composite. An embedded sensor waveguide generates a signal which follows the chemorheological changes during cure of a carbon-epoxy laminate and can be used to control the proc-ess. The embedded sensor signal declines in proportion to the sorbed water content and increases when water is desorbed. The sensor can also monitor the processing variables of a carbon-PEEK thermoplastic composite. The potential of free-volume dependent fluorescence probes to monitor the physical aging of an epoxy resin was demonstrated pointing to the potential for an additional application for the sensor.

Paper Details

Date Published: 5 February 1990
PDF: 9 pages
Proc. SPIE 1170, Fiber Optic Smart Structures and Skins II, (5 February 1990); doi: 10.1117/12.963101
Show Author Affiliations
S. D. Schwab, McDonnell Douglas Research Laboratories (United States)
R. L. Levy, McDonnell Douglas Research Laboratories (United States)

Published in SPIE Proceedings Vol. 1170:
Fiber Optic Smart Structures and Skins II
Eric Udd, Editor(s)

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