FBGS Strain–Optic Behavior with Different Polymeric Coatings Subject to Transverse Strain

Manuel González-Gallego; Felix Terroba Ramírez; Juan Luis Martinez-Vicente; Miguel González del Val; Juan José López-Cela; Malte Frövel

doi:10.20944/preprints202403.0137.v1

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preprints.org > chemistry and materials science > materials science and technology > doi: 10.20944/preprints202403.0137.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

FBGS Strain–Optic Behavior with Different Polymeric Coatings Subject to Transverse Strain

Manuel González-Gallego

^* ,

Felix Terroba Ramírez

Juan Luis Martinez-Vicente

Miguel González del Val

Juan José López-Cela

Malte Frövel

Version 1 : Received: 1 March 2024 / Approved: 4 March 2024 / Online: 4 March 2024 (10:49:03 CET)

A peer-reviewed article of this Preprint also exists.

González-Gallego, M.; Terroba Ramírez, F.; Martínez-Vicente, J.L.; González del Val, M.; López-Cela, J.J.; Frövel, M. Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain. Polymers 2024, 16, 1223. González-Gallego, M.; Terroba Ramírez, F.; Martínez-Vicente, J.L.; González del Val, M.; López-Cela, J.J.; Frövel, M. Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain. Polymers 2024, 16, 1223.

Abstract

This research work has been based on a previous study by the authors that characterized the behavior of a polyimide-coated FBG sensor in a structural monitoring system. Sensors applied to structural health monitoring are affected in the presence of a state of multidirectional strains simultaneously. The previous study observed the influence of transverse strain (ε_y) while keeping longitudinal strain constant (ε_x), where the direction x is the direction of the optical fiber. The present study developed an experimental methodology which has consisted of carrying out a campaign of biaxial tests on cruciform specimens with three embedded FBG sensors coated with polyimide, acrylate and ORMOCER®. Applying the Strain–Optic Theory as reference, a comparison of the results obtained with the different coatings has been studied. This experimental work has done it possible to study the influence of transverse strain (ε_y) in the longitudinal measurement of each of the FBG sensor and the influence of the coating material. Finally, the calibration procedure as well as the strain sensitivity factor K for each sensor has been defined.

Keywords

biaxial testing; Polymeric coating; FBG sensor; Composite material; Transverse strain; Structural Health Monitoring

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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