Global damage index of aerospace-grade CFRP subcomponents with FBG-based sensors

S. Goossens; K. Muñoz; M. Jiménez; E. Karachalios; F. Berghmans

doi:10.1117/12.2678088

23 May 2023 Global damage index of aerospace-grade CFRP subcomponents with FBG-based sensors

S. Goossens, K. Muñoz, M. Jiménez, E. Karachalios, F. Berghmans

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 1264309 (2023) https://doi.org/10.1117/12.2678088
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

Current composite structures used in aircraft can suffer from barely visible impact damage (BVID) that can compromise the load-bearing function of these structures. Especially damage-prone regions, such as the feet of a skin-stiffener structure, must therefore be frequently inspected for such damage. This increases aircraft downtimes and associated costs. A permanently installed structural health monitoring (SHM) network based on optical fiber sensors is an ideal candidate for performing condition-based maintenance (CBM) on such a structure. Individual FBG sensors have a known potential to detect the presence of BVIDs. In this work we propose a Global Damage Index (GDI) for quantifying the health of a composite component in manner of seconds, based on a network of 60 FBG sensors. We first establish a damage detection threshold and then carry out temperature compensated BVID detection with the GDI.

Citation Download Citation

S. Goossens, K. Muñoz, M. Jiménez, E. Karachalios, and F. Berghmans "Global damage index of aerospace-grade CFRP subcomponents with FBG-based sensors", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 1264309 (23 May 2023); https://doi.org/10.1117/12.2678088

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