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Proceedings 2018, 2(8), 536; https://doi.org/10.3390/ICEM18-05458

Matching Spectroscopy with the Ultrasonic Polar Scan for Advanced NDT of Composites

1
Department of Materials, Textiles and Chemical Engineering, Ghent University, 9052 Zwijnaarde, Belgium
2
Wave Propagation and Signal Processing (WPSP), Department of Physics, KU Leuven Kulak, 8500 Kortrijk, Belgium
Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 19 July 2018
PDF [1772 KB, uploaded 1 August 2018]

Abstract

The Pulsed Ultrasonic Polar Scan (P-UPS) is a powerful technique for characterizing anisotropic materials like fiber reinforced plastics. A time-domain analysis of the ultrasonic signals yields amplitude and time-of-flight polar diagrams that provide a fingerprint of the local stiffness properties. Though, this simple analysis ignores a lot of information contained in the ultrasonic signals. In this study, we propose to use the P-UPS technique in combination with the spectroscopic analysis of broadband pulses, to obtain plane wave transmission spectra for all in-plane polar angles. This allows us to combine on one hand the strengths of the P-UPS technique, that does not require a priori knowledge about the sample anisotropy, and on the other hand the frequency-domain analysis that utilizes information contained in the broadband pulses.
Keywords: Ultrasonic Polar Scan; spectroscopy; broadband Ultrasonic Polar Scan; spectroscopy; broadband
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Verboven, E.; Kersemans, M.; Martens, A.; Daemen, J.; Delrue, S.; Abeele, K.V.D.; Paepegem, W.V. Matching Spectroscopy with the Ultrasonic Polar Scan for Advanced NDT of Composites. Proceedings 2018, 2, 536.

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