Title :

Detection and imaging of BVIDs in composite plates

Author(s) :

Pierre, Goislot [Auteur]
Laboratoire Systèmes et Photonique pour le Monitoring (CEA, LIST) [LSPM (CEA, LIST)]
Ribay, Guillemette [Auteur]
Laboratoire Systèmes et Photonique pour le Monitoring (CEA, LIST) [LSPM (CEA, LIST)]
Moulin, Emmanuel [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Chehami, Lynda [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]

Conference title :

Anglo-French Physical Acoustics Conference 2024

City :

Loch Lomond

Country :

Royaume-Uni

Start date of the conference :

2024-01-17

English keyword(s) :

instrumentation
Composite materials
Barely Visible Impact Damages
defect
non-destructive testing
defect localization
Structural Health Monitoring
sensor
inspection
ultrasound
guided waves
defect size
sensitivity
microcrack
low-frequency guided waves
wave scattering
anisotropic media
simulation
CIVA

HAL domain(s) :

Physique [physics]/Physique [physics]/Instrumentations et Détecteurs [physics.ins-det]
Informatique [cs]/Modélisation et simulation
Physique [physics]/Mécanique [physics]/Acoustique [physics.class-ph]

English abstract : [en]

Composite materials are increasingly used in the aerospace industry. However, they may be subjected to Barely Visible Impact Damages (BVIDs). BVIDs can occur during maintenance phases or during flight and are almost ...
Show more >Composite materials are increasingly used in the aerospace industry. However, they may be subjected to Barely Visible Impact Damages (BVIDs). BVIDs can occur during maintenance phases or during flight and are almost impossible to detect with the naked eye. Although very small, these defects greatly weaken the structure and present a significant safety risk if they are not detected early enough. Currently, very high frequency non-destructive testing methods can be used for BVIDs localization but involve immobilizing the aircraft. In addition, some parts are difficult to access. This explains the growing interest for Structural Health Monitoring or SHM in the industry. Indeed, the objective is to integrate the sensors throughout the life of the aircraft and to carry out control in near real time. This makes possible to increase the frequency of inspections while reducing costs.Most aeronautical parts have plate-like geometries, and are therefore commonly inspected using ultrasound guided waves. Guided waves have the advantage of propagating over long distances, but are rapidly attenuated at high frequencies in composite materials. Linear methods require a sufficiently smallwavelength relative to the defect size and are sensitive to high-frequency heterogeneities. Furthermore, the microcracks created by BVIDs are partially closed and therefore difficult to detect with linear methods, even at high frequencies. Hence, we propose to use low frequency guided waves non-linear methods. Inorder to precisely locate defects, it is necessary to take the dispersive nature of guided waves into account. A Beam Forming algorithm with dispersion compensation in very anisotropic media is presented. In a first step, the algorithm has been validated numerically and experimentally in a linear imaging version for both A0 and S0, respectively from data simulated with the CIVA software and with measurements on a CFRP composite plate, in the frequency range 10kHz-90kHz. Then this algorithm will be adapted to the non-linear case with a pump-probe type setup, and evaluated on impact defects (BVID created by compressed air impactor).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL