Structural Health Monitoring of Composite Laminate for Aerospace Applications via Embedded Panda Fiber Bragg Grating

Annunziato, Andrea; Erario, Alessia; Anelli, Francesco; Abbate, G.; Godfrey, Mike; Jantzen, Alexander; Gates, James C.; Holmes, Christopher; Ciminelli, Caterina; Prudenzano, Francesco

doi:10.1109/icton51198.2020.9203011

Cited by 2 publications

(2 citation statements)

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“…Three different kinds of PM optical fibers are taken into account, whose geometric and physical parameters employed for the simulation are taken from literature papers [24], [33]- [35]. We investigated Panda, Bow tie and Pseudo-rectangle optical fibers considering three different embedding techniques: i) embedding in CFRP without coating, without APFs, Fig.…”

Section: Opto-mechanical Simulationmentioning

confidence: 99%

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Design of Polarization-Maintaining FBGs Using Polyimide Films to Improve Strain-Temperature Sensing in CFRP Laminates

et al. 2021

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Uniform Fiber Bragg Grating sensors based on Polarization-Maintaining fibers are designed for simultaneous longitudinal strain and temperature measurement of Carbon Fiber Reinforced Polymer laminates. Panda, Bow tie and Pseudo-rectangle optical fiber shape sections are investigated employing three different embedding methods, for each optical fiber. The simulation accurately takes into account that the fibers are embedded in unidirectional Carbon Fiber Reinforced Polymer and covered between two adhesive polyimide films. An exhaustive, accurate and robust investigation of the mechanisms originating Bragg wavelength shift is developed by considering a complete multiphysical model including: the propagation modes and their interaction, the birefringence, the optomechanical and thermal behaviour of both the optical fiber and the embedding composite material. For the first time, the use of polyimide films is proposed to obtain an increase of temperature sensor sensitivity, reducing the stress-transfer, due to thermal expansion, between the composite laminate and the sensing element. The designed Fiber Bragg Grating sensors are compared and their potential application, for simultaneous strain and temperature measurement of Carbon Fiber Reinforced Polymer is discussed.

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Section: Opto-mechanical Simulationmentioning

confidence: 99%

“…For the Panda fiber, the distance between the centres of the core and of the SAP is = 26.8 , SAP has a diameter 1 = 35.5 (see Fig. 5(a)) [35]. For the Bow tie fiber, the position of the SAP is given by 1 = 7.5 , 2 = 47.5 , = 90° (see Fig.…”

Section: Opto-mechanical Simulationmentioning

confidence: 99%