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The Lamb waves phase velocity dispersion evaluation using an hybrid measurement technique.
- Source :
-
Composite Structures . Jan2018, Vol. 184, p1156-1164. 9p. - Publication Year :
- 2018
-
Abstract
- In this paper two techniques: the zero-crossing and the spectrum decomposition are implemented together to obtain the guided waves phase velocity and their dispersion properties. This proposed hybrid technique has been investigated in two different mediums: an homogenous using signals obtain by 2D finite element modeling and experimental investigation and a non-homogenous environment using 3D finite element model. The results are compared with those obtained by the semi-analytical finite element method (SAFE). It was demonstrated that in the case of correctly selected filters the dispersion curves are reconstructed in approximately 90% for the Lamb wave A 0 mode, for the non – dispersive S 0 mode up to 81% of the incident signal frequency bandwidth in a homogeneous medium. In the case of non-homogenous CFRP plate the phase velocity dispersion curve of the A 0 mode can be reconstructed even up to 96% incident frequency bandwidth. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02638223
- Volume :
- 184
- Database :
- Academic Search Index
- Journal :
- Composite Structures
- Publication Type :
- Academic Journal
- Accession number :
- 126295890
- Full Text :
- https://doi.org/10.1016/j.compstruct.2017.10.060