Investigating the use of polarization maintaining FBG sensors for GW-based SHM

Rohan Soman; Sara Sarbaz; Kaleeswaran Balasubramaniam; Ali Golestani; Michał Karpiński; Tomasz Wandowski; Paweł Malinowski; Wiesław Ostachowicz

doi:10.1117/12.2658465

25 April 2023 Investigating the use of polarization maintaining FBG sensors for GW-based SHM

Rohan Soman, Sara Sarbaz, Kaleeswaran Balasubramaniam, Ali Golestani, Michał Karpiński, Tomasz Wandowski, Paweł Malinowski, Wiesław Ostachowicz

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Proceedings Volume 12488, Health Monitoring of Structural and Biological Systems XVII; 124881U (2023) https://doi.org/10.1117/12.2658465
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

Guided waves (GWs) are very popular for the damage detection of thin-walled structures. They propagate large distances and relatively few may be used for damage localization. The problem with their use for complex structures is the signal processing. Due to the presence of multiple modes, and mode conversion and reflections from the structure boundaries and discontinuities the signal processing is indeed challenging. In order to reduce the complexity, lower frequencies are used to limit the excitation only to the fundamental modes. Even then the signal processing may be challenging. So efforts are focussed on the ability of some sensors to detect only a particular wave. This paper aims at investigating the suitability of the polarization maintaining FBG (PM-FBG) for this purpose.

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Rohan Soman, Sara Sarbaz, Kaleeswaran Balasubramaniam, Ali Golestani, Michał Karpiński, Tomasz Wandowski, Paweł Malinowski, and Wiesław Ostachowicz "Investigating the use of polarization maintaining FBG sensors for GW-based SHM", Proc. SPIE 12488, Health Monitoring of Structural and Biological Systems XVII, 124881U (25 April 2023); https://doi.org/10.1117/12.2658465

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