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Proceedings Paper

Full spectral interrogation of fiber Bragg grating sensors for measurements of damage during steady-state vibration
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Paper Abstract

In this study we evaluate the measurements of a fiber Bragg grating (FBG) sensor subjected to a non-uniform static strain state and simultaneously exposed to vibration loading. The full spectral response of the sensor is interrogated in reflection at 100 kHz during two loading cases: with and without an added vibration load spectrum. The static tensile loading is increased between each test, in order to increase the magnitude of the non-uniform strain field applied to the FBG sensor. During steady-state vibration, the behavior of the spectral shape of the FBG reflection varies depending on the extent of non-uniform strain. With high-speed full spectral interrogation, it is potentially possible to separate this vibration-induced spectral change from spectral distortions due to non-uniform strain. Such spectral distortion contains valuable information on the static damage state of the surrounding host material.

Paper Details

Date Published: 30 March 2012
PDF: 12 pages
Proc. SPIE 8346, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2012, 83460C (30 March 2012); doi: 10.1117/12.915150
Show Author Affiliations
S. Webb, North Carolina State Univ. (United States)
K. Peters, North Carolina State Univ. (United States)
M. A. Zikry, North Carolina State Univ. (United States)
S. Chadderdon, Brigham Young Univ. (United States)
R. Selfridge, Brigham Young Univ. (United States)
S. Schultz, Brigham Young Univ. (United States)

Published in SPIE Proceedings Vol. 8346:
Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2012
Theodore E. Matikas, Editor(s)

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