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Proceedings Paper

Structural integrity monitoring of aircraft panels using a distributed Bragg grating sensing technique
Author(s): Dawn K. Gifford; Brooks A. Childers; Roger G. Duncan; Anthony C. Jackson; Surendra Shaw; William Schwienberg; James Mazza
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Paper Abstract

We report the use of a fiber-optic distributed sensing system to monitor crack growth on aircraft panels. The system utilizes optical frequency domain reflectometry to demodulate the reflected signals from up to thousands of weakly reflecting gratings photoetched along a single optical fiber. In our experiment, data from a regular array of sensors attached to an aircraft panel were recorded as the panel was subjected to increasing loads. Strain contour maps generated from these data enable clear visualization of the crack growth over time. A similar experiment was also performed using fiber-optic strain sensors embedded in aircraft composite repair patches. The results of these experiments demonstrate the viability of distributed fiber-optic sensing for crack growth monitoring.

Paper Details

Date Published: 22 July 2003
PDF: 9 pages
Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003); doi: 10.1117/12.508072
Show Author Affiliations
Dawn K. Gifford, Luna Innovations, Inc. (United States)
Brooks A. Childers, Luna Innovations, Inc. (United States)
Roger G. Duncan, Luna Innovations, Inc. (United States)
Anthony C. Jackson, Lockheed Martin Aeronautics Co. (United States)
Surendra Shaw, Lockheed Martin Aeronautics Co. (United States)
William Schwienberg, Robins Air Force Base (United States)
James Mazza, Wright Patterson Air Force Base (United States)

Published in SPIE Proceedings Vol. 5050:
Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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