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28 April 1987 Embedded Optical Fiber Strain Sensor For Composite Structure Applications
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Proceedings Volume 0718, Fiber Optic and Laser Sensors IV; (1987)
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States
Optical fibers have been embedded in polymer-matrix fiber reinforced composite materials during fabrication. Subsequent testing has shown that optical coupling to, and transmission through, the embedded fibers can be accomplished. A radio frequency interferometric sensor instrument has been built to detect small changes in the optical fiber path length. Elongations smaller than 1 mm over a 1 m path, corresponding to a distributed strain threshold below 1000 μin./in., have been detected. The instrument has been used to demonstrate strain measurement with embedded fibers in graphite/epoxy test specimens. These measurements are compared with electrical resistance strain gage readings.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W.Jeffrey Rowe, E O Rausch, and P D Dean "Embedded Optical Fiber Strain Sensor For Composite Structure Applications", Proc. SPIE 0718, Fiber Optic and Laser Sensors IV, (28 April 1987);

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