1. Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain.
- Author
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González-Gallego, Manuel, Terroba Ramírez, Félix, Martínez-Vicente, Juan Luis, González del Val, Miguel, López-Cela, Juan José, and Frövel, Malte
- Subjects
FIBER Bragg gratings ,STRUCTURAL health monitoring ,DETECTORS ,OPTICAL fibers - Abstract
This research work is based on a previous study by the authors that characterized the behavior of FBG sensors with a polyimide coating in a structural monitoring system. Sensors applied to structural health monitoring are affected by the presence of simultaneous multidirectional strains. The previous study observed the influence of the transverse strain ( ε y ) while keeping the longitudinal strain constant ( ε x ), where the x direction is the direction of the optical fiber. The present study develops an experimental methodology consisting of a biaxial test plan on cruciform specimens with three embedded FBG sensors coated with polyimide, acrylate, and ORMOCER
® . Applying the Strain–Optic Theory as a reference, a comparison of the experimental values obtained with the different coatings was studied. This experimental work made it possible to study the influence of the transverse strain ( ε y ) on the longitudinal measurements of each FBGS and the influence of the coating material. Finally, the calibration procedure was defined as well as K (strain sensitivity factor) for each sensor. [ABSTRACT FROM AUTHOR]- Published
- 2024
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