Download | - View accepted manuscript: Laser-Ultrasonic Characterization of Fiber Reinforced Composites: Effect of the Generation Laser Transverse Modes (PDF, 668 KiB)
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DOI | Resolve DOI: https://doi.org/10.1063/1.1711638 |
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Author | Search for: Campagne, B.1; Search for: Lévesque, D.1; Search for: Bescond, C.1; Search for: Néron, C.1; Search for: Blouin, A.1; Search for: Monchalin, J.-P.1 |
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Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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Format | Text, Article |
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Conference | Quantitative Nondestructive Evaluation (QNDE 2003), Green Bay, WI, USA, 27 July-1 August 2003, 27 July-1 August 2003, Green Bay, WI, USA |
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Subject | fibre reinforced composites; ultrasonic materials testing; laser beam applications; acoustic wave production; ultrasonic velocity; ultrasonic absorption; acoustic dispersion; light diffraction; Nondestructive testing; ultrasonic testing; photoacoustic testing; Ultrasonics; quantum acoustics; physical effects of sound; Reinforced polymers; polymer-based composites |
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Abstract | Laser-ultrasonics has been used with success for the microstructure evaluation of metals by measuring ultrasonic attenuation and velocity. Extension of this technique to fiber reinforced polymer composites could provide useful information such as fiber contents and porosity. Ultrasonic generation in composite materials is usually performed by using a pulsed TEA-CO2 laser operated on several transverse modes. The intensity profile of this laser could change from shot-to-shot, thus affecting the ultrasonic generation pattern and the accuracy of attenuation measurement. Two solutions are possible to overcome this problem. The first reported approach consists in numerically correcting for the diffraction effect by using a Monte Carlo integration after simultaneous acquisition of the ultrasonic signal and the laser mode pattern. The second reported approach consists in modifying the laser resonator to get a single transverse mode while maintaining high energy per pulse, and to make the diffraction correction much simpler. Both approaches have been tested on a bare carbon epoxy plate with laser generation in the thermoelastic regime. The results obtained from using either approaches show a significant improvement and are compared to those obtained by conventional ultrasonics. |
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Publication date | 2004-02-26 |
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Language | English |
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Peer reviewed | No |
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NRC number | NRCC 50514 |
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NPARC number | 18487247 |
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Export citation | Export as RIS |
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Report a correction | Report a correction (opens in a new tab) |
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Record identifier | 7579813e-6d7f-40f8-93b4-378d385d2f00 |
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Record created | 2011-10-11 |
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Record modified | 2020-04-17 |
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