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An Investigation of Optical Fiber Coating Performance in Embedded Sensing Applications

Published online by Cambridge University Press:  21 February 2011

Rebecca A. Haaksma
Affiliation:
Alcoa Laboratories, Alcoa Center, PA 15069.
Marilyn J. Cehelnik
Affiliation:
Alcoa Laboratories, Alcoa Center, PA 15069.
M. Jonell Kerkhoff
Affiliation:
Alcoa Laboratories, Alcoa Center, PA 15069.
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Abstract

The use of composite materials for aerospace applications has created an increased need for developing nondestructive methods for assessment of composite performance. Embedded optical fiber sensor technology provides the potential for monitoring parameters of interest during processing and testing of composite materials as well as the opportunity for tracking properties over the lifetime of composite parts in service. The successful development of this technology depends on designing optical fiber sensor systems suitable for embedding in composite structures.

This paper focuses on the role played by optical fiber coatings in the design of embedded sensor systems. The performance of different optical fiber coatings under typical composite processing conditions will be discussed. Photomicrographs of test specimens containing embedded sensors will be presented which show delamination occurring at the coating/optical fiber interface in preference to the coating/epoxy resin interface. Coating performance criteria will be outlined for use in the selection of fiber optic sensors for composite applications.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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