Dynamic, full-spectral interrogation of fiber Bragg grating sensors for impact testing of composite laminates

A. Propst; K. Peters; M. A. Zikry; W. Kunzler; Z. Zhu; M. Wirthlin; R. Selfridge; S. Schultz

doi:10.1117/12.835406

5 October 2009 Dynamic, full-spectral interrogation of fiber Bragg grating sensors for impact testing of composite laminates

A. Propst, K. Peters, M. A. Zikry, W. Kunzler, Z. Zhu, M. Wirthlin, R. Selfridge, S. Schultz

Author Affiliations +

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, and 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); https://doi.org/10.1117/12.835406

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