In-Service Characterization Of Composite Matrices With An Embedded Fluorescence Optrode Sensor

S. D. Schwab; R. L. Levy

doi:10.1117/12.963101

5 February 1990 In-Service Characterization Of Composite Matrices With An Embedded Fluorescence Optrode Sensor

S. D. Schwab, R. L. Levy

Proceedings Volume 1170, Fiber Optic Smart Structures and Skins II; (1990) https://doi.org/10.1117/12.963101
Event: OE/FIBERS '89, 1989, Boston, United States

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.

Citation Download Citation

S. D. Schwab and R. L. Levy "In-Service Characterization Of Composite Matrices With An Embedded Fluorescence Optrode Sensor", Proc. SPIE 1170, Fiber Optic Smart Structures and Skins II, (5 February 1990); https://doi.org/10.1117/12.963101

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