Embedded Bragg grating fiber optic sensor for composite flexbeams

Daniel E. Bullock; James R. Dunphy; Gerard H. Hufstetler

doi:10.1117/12.141321

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26 March 1993 Embedded Bragg grating fiber optic sensor for composite flexbeams

Daniel E. Bullock, James R. Dunphy, Gerard H. Hufstetler

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Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141321
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

An embedded fiber-optic (F-O) sensor has been developed for translaminar monitoring of the structural integrity of composites, with a view to application in composite helicopter flexbeams for bearingless main rotor hubs. This through-thickness strain sensor is much more sensitive than conventional in-plane embedded F-O sensors to ply delamination, on the basis of a novel insertion technique and innovative Bragg grating sensor. Experimental trials have demonstrated the detection by this means of potential failures in advance of the edge-delamination or crack-propagation effect.

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Daniel E. Bullock, James R. Dunphy, and Gerard H. Hufstetler "Embedded Bragg grating fiber optic sensor for composite flexbeams", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141321

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