Strain measurement with multiplexed FBG sensor arrays: An experimental investigation

Falcão, Bruno da Silva; Giwelli, Ausama; Kiewiet, Melissa Nogueira; Banks, Stephen P.; Yabesh, George; Esteban, Lionel; Kiewiet, Leigh; Yekeen, Nurudeen; Kovalyshen, Yevhen; Monmusson, Ludwig; Al-Yaseri, Ahmed; Keshavarz, Alireza; Iglauer, Stefan

doi:10.1016/j.heliyon.2023.e18652

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…Its objectives are to detect stress levels in the structure, the likelihood of failure, and the depletion of its life due to fatigue or the appearance of overloads, among others [24][25][26]. One of the most widely used monitoring technologies is fiber optic sensors in Bragg gratings (FBGSs), which offer several interesting advantages over extensometry technologies, including small dimensions, the ability to be embedded, simplicity in cabling due to their multiplexability, stable thermal and load monitoring, and insensitivity to electromagnetic interference, among others [27][28][29][30][31]. Using FBGSs in structures necessitates a comprehensive understanding of the sensor's behavior and its response to various variables, including temperature, humidity, dynamic loads, and the occurrence of loads and/or strains in multiple directions.…”

Section: Of 16mentioning

confidence: 99%

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

González-Gallego,

Terroba Ramírez,

Martínez-Vicente

et al. 2024

Polymers

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This research work is based on a previous study by the authors that characterized the behavior of FBG sensors with a polyimide coating in a structural monitoring system. Sensors applied to structural health monitoring are affected by the presence of simultaneous multidirectional strains. The previous study observed the influence of the transverse strain (εy) while keeping the longitudinal strain constant (εx), where the x direction is the direction of the optical fiber. The present study develops an experimental methodology consisting of a biaxial test plan on cruciform specimens with three embedded FBG sensors coated with polyimide, acrylate, and ORMOCER®. Applying the Strain–Optic Theory as a reference, a comparison of the experimental values obtained with the different coatings was studied. This experimental work made it possible to study the influence of the transverse strain (εy) on the longitudinal measurements of each FBGS and the influence of the coating material. Finally, the calibration procedure was defined as well as K (strain sensitivity factor) for each sensor.

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Section: Of 16mentioning

confidence: 99%

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

González-Gallego,

Terroba Ramírez,

Martínez-Vicente

et al. 2024

Polymers

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Advanced Sensors and Sensing Systems for Structural Health Monitoring in Aerospace Composites

Ogunleye,

Rusnáková,

Javořík

et al. 2024

Adv Eng Mater

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This review examines the state‐of‐the‐art sensors and sensing technologies employed for structural health monitoring (SHM) in aerospace composites, highlighting the shift from conventional nondestructive evaluation techniques to real‐time monitoring systems. The review discusses the challenges associated with composite materials, such as their anisotropic nature and susceptibility to invisible damage, and how these challenges have driven the improvement of SHM techniques. Fiber‐optic sensors, including interferometric, distributed, and grating‐based sensors, are analyzed for their high sensitivity and multiplexing capabilities, making them suitable for distributed sensing applications. Piezoelectric sensors are evaluated for their effectiveness in both active and passive damage detection methods. At the same time, piezoresistive self‐sensing systems are explored for their potential to integrate sensing directly into composite materials. The review also addresses the challenges encountered in implementing SHM systems. It suggests solutions like protective coatings, advanced data processing algorithms, and modular system design to overcome these challenges. In conclusion, this review provides a comprehensive overview of the current SHM technologies for aerospace composites, underscoring the need for sustained research and development to improve sensor technology, expand data processing capabilities, and ensure seamless integration with aircraft systems, thus contributing to the safety and efficiency of aerospace operations.

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Strain measurement with multiplexed FBG sensor arrays: An experimental investigation

Cited by 2 publications

References 41 publications

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

Advanced Sensors and Sensing Systems for Structural Health Monitoring in Aerospace Composites

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