DOI | Resolve DOI: https://doi.org/10.1117/12.434184 |
---|
Author | Search for: Lévesque, D.1; Search for: Massabki, M.1; Search for: Choquet, M.1; Search for: Néron, C.1; Search for: Bellinger, N. C.2; Search for: Forsyth, D.2; Search for: Chapman, C. E.2; Search for: Gould, R.2; Search for: Komorowski, J. P.2; Search for: Monchalin, J.-P.1 |
---|
Name affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
- National Research Council of Canada. NRC Institute for Aerospace Research
|
---|
Format | Text, Article |
---|
Conference | Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, March 6-8, 2001, Newport Beach, CA, USA |
---|
Subject | 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 |
---|
Abstract | 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. |
---|
Publication date | 2001-07-24 |
---|
Publisher | SPIE |
---|
In | |
---|
Series | |
---|
Language | English |
---|
Peer reviewed | Yes |
---|
NPARC number | 21275962 |
---|
Export citation | Export as RIS |
---|
Report a correction | Report a correction (opens in a new tab) |
---|
Record identifier | 7d3a8273-d1b3-4cfe-98ae-1bace087b9fd |
---|
Record created | 2015-08-21 |
---|
Record modified | 2020-03-27 |
---|