| Title: |
Comparison of ultrasonically generated shear and zero-group velocity Lamb waves for damage detection in adhesively bonded aluminum plates |
| Authors: |
Spytek, J.; Pyzik, Patrycja; Ziaja-Sujdak, Aleksandra; Ambrozinski, Lukasz |
| Contributors: |
AGH University of Science and Technology Krakow, PL (AGH UST) |
| Source: |
Forum Acusticum ; https://hal.archives-ouvertes.fr/hal-03240334 ; Forum Acusticum, Dec 2020, Lyon, France. pp.2563-2566, ⟨10.48465/fa.2020.0843⟩ |
| Publisher Information: |
HAL CCSD |
| Publication Year: |
2020 |
| Collection: |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| Subject Terms: |
Laser ultrasound; ZGV; shear waves; bonded joints; [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]; [PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph] |
| Subject Geographic: |
Lyon; France |
| Description: |
International audience ; Adhesively bonded metals are often used for manufacturing aerospace and automotive structures. Critical, load-bearing elements reinforced using stiffeners bonded to the main structure are increasingly used in these applications. Inspecting the bonded parts remains challenging for modern non-destructive testing techniques. Since the limited bandwidth of classical ultrasonic (US) testing systems cannot resolve multiple reflections and mode- conversions occurring at subsequent layers. Laser ultrasound (LU), due to its broadband nature, has shown great potential in high- resolution imaging of carbon-reinforced composites. For a metal surface, however, the excitation of longitudinal waves in the normal direction is inefficient. On the other hand, other elastic modes can be efficiently generated using laser absorption and used to image defects in metallic structures. In this paper, we present a comparison of two different approaches, i.e. zero-group velocity (ZGV) spectroscopy and shear waves-based imaging, to detect damage in adhesively bonded aluminum plates. Laser-generated shear waves propagating into the structure at an oblique angle are back-reflected at discontinuities in the adhesive layer and detected on the surface. The distance between transmitter and receiver must be adjusted to maximize system sensitivity at a given depth. The interpretation of the acquired data is, however, straight- forward and resamples classical US imaging. On the other hand, inspection using ZGV can be performed with pump and receiver beams focused to the same point on the sample surface. Multiple wave transitions over the metal and adhesive layers make the technique highly sensitive to changes in the inspected structure. Precise modeling, however, is required to use the ZGV data to interpret the data and characterize the defects. |
| Document Type: |
conference object |
| Language: |
English |
| Relation: |
hal-03240334; https://hal.archives-ouvertes.fr/hal-03240334; https://hal.archives-ouvertes.fr/hal-03240334/document; https://hal.archives-ouvertes.fr/hal-03240334/file/000843.pdf |
| DOI: |
10.48465/fa.2020.0843 |
| Availability: |
https://hal.archives-ouvertes.fr/hal-03240334; https://hal.archives-ouvertes.fr/hal-03240334/document; https://hal.archives-ouvertes.fr/hal-03240334/file/000843.pdf; https://doi.org/10.48465/fa.2020.0843 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.F0D76198 |
| Database: |
BASE |