DOI | Trouver le DOI : https://doi.org/10.1117/12.434184 |
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Auteur | Rechercher : Lévesque, D.1; Rechercher : Massabki, M.1; Rechercher : Choquet, M.1; Rechercher : Néron, C.1; Rechercher : Bellinger, N. C.2; Rechercher : Forsyth, D.2; Rechercher : Chapman, C. E.2; Rechercher : Gould, R.2; Rechercher : Komorowski, J. P.2; Rechercher : Monchalin, J.-P.1 |
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Affiliation | - Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
- Conseil national de recherches du Canada. Institut de recherche aérospatiale du CNRC
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Format | Texte, Article |
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Conférence | Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, March 6-8, 2001, Newport Beach, CA, USA |
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Sujet | corrosion; inspection; joints (structural components); laser applications; maintenance; natural frequencies; numerical methods; spectroscopy; ultrasonic applications; X-rays; aircraft structure; laser ultrasonic detection; metallic lap joint structures; numerical inversion method; resonance spectroscopy; aircraft parts and equipment |
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Résumé | Corrosion has been recognized as a serious problem in the maintenance of aging aircraft. The Industrial Materials Institute (IMI) has explored the use of laser-ultrasonics for the detection of hidden corrosion in metallic lap joint structures. For inspection with painted surfaces, IMI has shown that a resonance spectroscopy approach using a simple two-layer model can be used to determine the thickness of the paint layer and of the top metal skin. Validation of the model has been made using a test sample with a broad range of paint thickness. Once combined with a numerical inversion method, the model is used to produce a thickness map of the top metal skin from measured resonance frequencies. Results from standard samples with flat-bottom holes showed that the laser-ultrasonic technique could detect metal loss below 1%. The reliability of the method was also demonstrated on accelerated corrosion samples. Comparison to X-ray images showed that the laser-ultrasonic method presented a thickness map that had the same accuracy as the X-ray system without the need for dismantling the sample. These results indicated that laser-ultrasonics could be a useful tool not only to inspect aircraft during routine maintenance but also to provide valuable data in the study of corrosion inception and growth in lap joint structures. |
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Date de publication | 2001-07-24 |
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Maison d’édition | SPIE |
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Dans | |
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Série | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 21275962 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 7d3a8273-d1b3-4cfe-98ae-1bace087b9fd |
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Enregistrement créé | 2015-08-21 |
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Enregistrement modifié | 2020-03-27 |
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