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Guided wave imaging of composite plates using passive acquisitions by fiber Bragg gratings

Arnaud Recoquillay 1, * Tom Druet 1 Simon Nehr 1 Margaux Horpin 1 Olivier Mesnil 1 Bastien Chapuis 1 Guillaume Laffont 2 Oscar d'Almeida 3 
* Corresponding author
2 LCFO - Laboratoire Capteurs Fibres Optiques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : In this paper are presented imaging results of defects in composite plates using guided wave-based algorithms such as Delay and Sum and Excitelet. Those algorithms are applied to passive data, for which the signal corresponding to each emitter-receiver couple is recovered thanks to the cross-correlation of the ambient noise measured simultaneously by the two sensors. The transition to passive imaging allow the use of lighter sensors unable to emit ultrasonic waves such as Fiber Bragg Gratings sensors on optical fibers, which are used in this study. The imaging results presented here show the feasibility of active and passive imaging in composite plates using Fiber Bragg Gratings as receivers, reducing the impact of the acquisition system on the structure in the context of Structural Health Monitoring.
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Submitted on : Friday, October 23, 2020 - 8:17:13 AM
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Arnaud Recoquillay, Tom Druet, Simon Nehr, Margaux Horpin, Olivier Mesnil, et al.. Guided wave imaging of composite plates using passive acquisitions by fiber Bragg gratings. Journal of the Acoustical Society of America, Acoustical Society of America, 2020, 147 (5), pp.3565-3574. ⟨10.1121/10.0001300⟩. ⟨cea-02975826⟩



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