Li, L;
Fromme, P;
(2024)
Experimental validation of guided wave mode conversion at part-thickness defects in metal plates.
In: Su, Zhongqing and Peters, Kara J and Ricci, Fabrizio and Rizzo, Piervincenzo, (eds.)
Proceedings Volume 12951: Health Monitoring of Structural and Biological Systems XVIII.
(pp. p. 1295116).
SPIE: Bellingham, WA, USA.
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Abstract
Low frequency guided waves have been used to develop Structural Health Monitoring (SHM) for the early detection of fatigue cracks in metallic aircraft structures. The scattering and mode conversion of guided waves at part-thickness defects was investigated to quantify the sensitivity for defect detection and the potential for the development of a baseline-free SHM methodology employing mode-converted guided waves. Finite Element Analysis (FEA) and experimental validation were conducted to investigate the mode converted scattering from the S0 to the A0 Lamb wave mode at part-thickness crack-like defects in an aluminum plate. A piezoelectric (PZT) transducer was experimentally used as a plate edge excitation for the S0 mode and the out-of-plane displacement was measured using a laser vibrometer. Good agreement between the FEA and experimental results was obtained and the influence of defect depth and length was investigated and quantified.
| Type: | Proceedings paper |
|---|---|
| Title: | Experimental validation of guided wave mode conversion at part-thickness defects in metal plates |
| Event: | SPIE Smart Structures + Nondestructive Evaluation: 2024 |
| Dates: | 25 Mar 2024 - 29 Mar 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3012582 |
| Publisher version: | http://dx.doi.org/10.1117/12.3012582 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Finite element methods; Waveguides; Scattering; Aluminum; Structural health monitoring; Transducers; Nondestructive evaluation; Wave propagation; |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10193309 |
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