Crack Growth Monitoring by Embedded Optical Fibre Bragg Grating Sensors: Fibre Reinforced Plastic Crack Growing Detection

Gilmar Ferreira Pereira, Lars Pilgaard Mikkelsen, Malcolm McGugan

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Abstract

This article presents a novel method to asses a crack growing/damage event in fibre reinforced plastic, or adhesive using Fibre Bragg Grating (FBG) sensors embedded in a host material. Different features of the crack mechanism that induce a change in the FBG response were identified. Double Cantilever Beams specimens made with glass fibre glued with structural adhesive, were instrumented with an array of FBG sensors embedded in the material and tested using an experimental fracture procedure. A digital image correlation technique was used to determine the presence of the specific phenomena caused by the crack, and to correlate with the FBG sensor. A Material-Sensor model was developed in order to predict the sensor output response under a crack/delamination situation, which can be used as an analysis tool for future application of this measurement technology in more complex structures.
Original languageEnglish
Title of host publicationProceedings of OSENS 2015 - Special Session on Optical Sensors at Photooptics 2015
Number of pages7
PublisherSCITEPRESS Digital Library
Publication date2015
Pages133-139
ISBN (Electronic)978-989-758-092-5
DOIs
Publication statusPublished - 2015
EventPhotoptics 2015: Spessial Session on Optical Sensors - Berlin, Germany
Duration: 12 Mar 201514 Mar 2015

Conference

ConferencePhotoptics 2015
CountryGermany
CityBerlin
Period12/03/201514/03/2015

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