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

Proceedings

Martens, Arvid¹  Verboven, Erik²  Daemen, Jannes³  Kersemans, Mathias⁴ 

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

关键词: Ultrasonic Polar Scan;    spectroscopy;    broadb;   

DOI  :  10.3390/ICEM18-05458

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY