Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain-Reference-Cited by-同舟云学术

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

Published:2024-04-27 Issue:9 Volume:16 Page:1223
ISSN:2073-4360
Container-title:Polymers
language:en
Short-container-title:Polymers

Author:

González-Gallego Manuel¹²^ORCID,Terroba Ramírez Félix¹^ORCID,Martínez-Vicente Juan Luis²^ORCID,González del Val Miguel³,López-Cela Juan José²,Frövel Malte³^ORCID

Affiliation:

1. National Institute of Aerospace Technology, ICTS–CEHIPAR, 28048 Madrid, Spain

2. Instituto de Investigaciones Energéticas y Aplicaciones Industriales, Escuela Técnica Superior de Ingeniería Industrial, Universidad de Castilla—La Mancha, 13071 Ciudad Real, Spain

3. National Institute of Aerospace Technology, 28850 Torrejón de Ardoz, Spain

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 (εy) while keeping the longitudinal strain constant (εx), 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 (εy) 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.

Funder

the collaboration of the University of Castilla—La Mancha and National Institute of Aerospace Technology “Esteban Terradas”

Ministerio de Ciencia e Innovación of Spain

the Junta de Comunidades de Castilla—La Mancha

the University of Castilla—La Mancha

Publisher

MDPI AG

Link

https://www.mdpi.com/2073-4360/16/9/1223/pdf

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