Print Email Facebook Twitter Analysis of FBG reflection spectra under uniform and non-uniform transverse loads Title Analysis of FBG reflection spectra under uniform and non-uniform transverse loads Author Fazzi, L. (TU Delft Structural Integrity & Composites; Università degli Studi di Palermo) Rajabzadeh, Aydin (TU Delft Signal Processing Systems) Milazzo, Alberto (Università degli Studi di Palermo) Groves, R.M. (TU Delft Structural Integrity & Composites) Contributor Lynch, Jerome P. (editor) Sohn, Hoon (editor) Wang, Kon-Well (editor) Huang, Haiying (editor) Date 2019 Abstract Loads applied transversely on the external surface of waveguides change their circular cross-sectional geometry generating birefringence. Due to this effect the reflected spectrum of a Fibre Bragg grating (FBG) undergoes a splitting of the single peak of the Bragg wavelength. In this work, we employed the Transfer Matrix Method (TMM) for x- and y-polarized wave-modes to model the uniform FBG reflection spectra for uniform and non-uniform transverse loads. We also performed experimental measurements for two different transverse load scenarios. The load profiles chosen for these experiments were applied on the FBG sensor through a block of steel and a roll bearing pin. Then, the modelled and experimental results were compared resulting in good agreement of 85% (on average). Finally, during the roll bearing pin loading test, different responses were observed depending how the FBGs were surface mounted. To investigate this, the glue layer influence on the reflected spectrum was further studied experimentally. Subject birefringencepolarizationStructural Health Monitoring (SHM)transfer matrixtransverse loadsuniform FBG To reference this document use: http://resolver.tudelft.nl/uuid:8d1a82a6-f8cb-4793-ba2a-d24ac3a5c6cf DOI https://doi.org/10.1117/12.2513795 Publisher SPIE ISBN 9781510625952 Source Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019, 10970 Event Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019, 2019-03-04 → 2019-03-07, Denver, United States Series SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2019, 0277-786X Part of collection Institutional Repository Document type conference paper Rights © 2019 L. Fazzi, Aydin Rajabzadeh, Alberto Milazzo, R.M. Groves Files PDF 109701X.pdf 748.23 KB Close viewer /islandora/object/uuid:8d1a82a6-f8cb-4793-ba2a-d24ac3a5c6cf/datastream/OBJ/view