Embedded Optical Fiber Strain Sensor For Composite Structure Applications

W.Jeffrey Rowe; E O Rausch; P D Dean

doi:10.1117/12.937526

28 April 1987 Embedded Optical Fiber Strain Sensor For Composite Structure Applications

W.Jeffrey Rowe, E O Rausch, P D Dean

Proceedings Volume 0718, Fiber Optic and Laser Sensors IV; (1987) https://doi.org/10.1117/12.937526
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.937526

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