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Broadband immersion laser ultrasonic tomography of graphite-epoxy composite
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Paper Abstract

Laser ultrasonic tomography uses pulsed laser light for photoacoustic excitation of short probe ultrasonic pulses in a special light-absorbing plate. These pulses propagate through the immersion liquid, then they are reflected from the surface of the object and scattered by the inhomogeneities inside the object. Scattered and reflected waves are recorded by a broadband multi-element piezoelectric array and used to reconstruct the image. The wide spectral band (0.1-15 MHz) of probe pulses is well suited to the problem of inspection of carbon-fiber-reinforced polymers (CFRPs), allowing visualization of individual carbon fiber layers and defects with high accuracy. In this paper, laser ultrasonic tomography is proposed for inspection of CFRPs. The experimental results of the inspection of a graphite-epoxy composite sample with inclusions and defects are presented.

Paper Details

Date Published: 11 November 2019
PDF: 5 pages
Proc. SPIE 11210, Fourteenth School on Acousto-Optics and Applications, 1121004 (11 November 2019); doi: 10.1117/12.2540104
Show Author Affiliations
V. Zarubin, The National Univ. of Science and Technology "MISiS" (Russian Federation)
M.V. Lomonosov Moscow State Univ. (Russian Federation)
A. Bychkov, The National Univ. of Science and Technology "MISiS" (Russian Federation)
M.V. Lomonosov Moscow State Univ. (Russian Federation)
V. Simonova, The Institute on Laser and Information Technologies of the RAS (Russian Federation)
E. Cherepetskaya, The National Univ. of Science and Technology "MISIS" (Russian Federation)
A. Karabutov, The National Univ. of Science and Technology "MISIS" (Russian Federation)
M.V. Lomonosov Moscow State Univ. (Russian Federation)
The Institute on Laser and Information Technologies of the RAS (Russian Federation)


Published in SPIE Proceedings Vol. 11210:
Fourteenth School on Acousto-Optics and Applications
Ireneusz Grulkowski; Bogumił B. J. Linde; Martí Duocastella, Editor(s)

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