5 October 2009 Dynamic, full-spectral interrogation of fiber Bragg grating sensors for impact testing of composite laminates
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75030G (2009) https://doi.org/10.1117/12.835406
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
Abstract
This paper presents the full-spectral measurement of fiber Bragg grating sensor responses during impact testing of composite laminates. The sensors are embedded in carbon fiber/epoxy laminates which are subjected to multiple low velocity impacts until perforation of the laminate occurs. Applying a recently developed high-speed interrogator, the Bragg grating sensor interrogation is demonstrated at 534 Hz over a 14.9 nm bandwidth. The measurement of the transient response of the grating sensors during impact reveals unique spectral signatures that could not be detected through peak-wavelength monitoring or post-impact full-spectral scanning of the sensors, including local relaxation of the laminate.
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A. Propst, K. Peters, M. A. Zikry, W. Kunzler, Z. Zhu, M. Wirthlin, R. Selfridge, S. Schultz, "Dynamic, full-spectral interrogation of fiber Bragg grating sensors for impact testing of composite laminates", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75030G (5 October 2009); doi: 10.1117/12.835406; https://doi.org/10.1117/12.835406
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