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26 March 1993 Embedded Bragg grating fiber optic sensor for composite flexbeams
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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