26 March 1993 Embedded Bragg grating fiber optic sensor for composite flexbeams
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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, Daniel E. Bullock, James R. Dunphy, James R. Dunphy, Gerard H. Hufstetler, 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); doi: 10.1117/12.141321; https://doi.org/10.1117/12.141321
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