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Conference papers
Defect imaging on CFRP and honeycomb composite structures by guided waves generated and detected by a sparse PZT array
Abstract : Sandwich honeycomb structures (aluminum core bonded to Carbon Fiber Reinforced Polymer (CFRP) sheets on either side) are widely employed in the aerospace industry for their high strength to mass ratio. However, they might be subjected to damages such as delaminations of the composite sheets or debondings between the face sheets and the core due to impacts or thermo-mechanical aging. In order to reduce maintaining costs and extend the service time, Guided Waves (GW) based Structural Health Monitoring (SHM) systems are considered an adequate solution. Indeed, GW propagate over long distances and exhibit low attenuation, thus allowing to monitor wide areas with a limited number of sensors. Defect imaging on CFRP composites and honeycomb composite structures using both Delay-And-Sum [1] and correlation-based algorithm Excitelet [2] is presented in this communication. A machine learning algorithm is finally implemented in order to automatically identify and isolate defects on a given cartography map. The machine learning algorithm is trained on an experimental database of false and positive results obtained on representative specimens.
https://hal-cea.archives-ouvertes.fr/cea-01842363
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Wednesday, June 2, 2021 - 4:15:43 PM
Last modification on : Thursday, February 17, 2022 - 10:08:05 AM
Long-term archiving on: : Friday, September 3, 2021 - 7:45:14 PM
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Wednesday, June 2, 2021 - 4:15:43 PM
Last modification on : Thursday, February 17, 2022 - 10:08:05 AM
Long-term archiving on: : Friday, September 3, 2021 - 7:45:14 PM
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20170630_DefectImaging.pdf
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