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Numerical Modelling of Wave Propagation in Optical Fibre using Frequency Domain Spectral Element Method

Paunikar, S and Soman, R and Ostachowicz, W (2022) Numerical Modelling of Wave Propagation in Optical Fibre using Frequency Domain Spectral Element Method. In: Health Monitoring of Structural and Biological Systems XVI 2022, 4 - 10 April 2022, Virtual, Online at Long Beach, California, United States,.

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Official URL: https://doi.org/10.1117/12.2612489


Ultrasonic guided waves are commonly used in aerospace, civil, and mechanical industries for inspecting the health of a structure non-destructively. The excellent efficiency whilst sensing ultrasonic waves and the single lead-in and lead-out wire prove advantageous while using Fibre Bragg Grating (FBG) sensors as transducers. To overcome high signal-to-noise ratio demand of FBGs directly bonded to structures, researchers have recently proposed use of edge reflection approach as well as the remote bonding configuration. In order to maximise the efficiency of such FBGs, it is essential to understand the wave propagation behaviour in the FBG and the nature of strain transfer from the structure to the FBG. In this work, these aspects are studied using experiments and numerical model based on spectral finite element method (SFEM). The paper discusses the physics of the wave propagation from the structure to the fibre and the directional sensitivity of the FBG sensors in a computationally efficient way.

Item Type: Conference Paper
Publication: Proceedings of SPIE - The International Society for Optical Engineering
Publisher: SPIE
Additional Information: The copyright for this article belongs to the SPIE.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 27 Jun 2022 07:05
Last Modified: 27 Jun 2022 07:05
URI: https://eprints.iisc.ac.in/id/eprint/73975

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