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Proceedings Paper

Defect induced guided waves mode conversion
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Paper Abstract

This paper deals with analysis of guided waves mode conversion phenomenon in fiber reinforced composite materials. Mode conversion phenomenon may take place when propagating elastic guided waves interact with discontinuities in the composite waveguide. The examples of such discontinuities are sudden thickness change or delamination between layers in composite material. In this paper, analysis of mode conversion phenomenon is based on full wave-field signals. In the full wave-field approach signals representing propagation of elastic waves are gathered from dense mesh of points that span over investigated area of composite part. This allow to animate the guided wave propagation. The reported analysis is based on signals resulting from numerical calculations and experimental measurements. In both cases defect in the form of delamination is considered. In the case of numerical research, Spectral Element Method (SEM) is utilized, in which a mesh is composed of 3D elements. Numerical model includes also piezoelectric transducer. Full wave-field experimental measurements are conducted by using piezoelectric transducer for guided wave excitation and Scanning Laser Doppler Vibrometer (SLDV) for sensing.

Paper Details

Date Published: 1 April 2016
PDF: 16 pages
Proc. SPIE 9805, Health Monitoring of Structural and Biological Systems 2016, 98050O (1 April 2016); doi: 10.1117/12.2218233
Show Author Affiliations
Tomasz Wandowski, Institute of Fluid-Flow Machinery (Poland)
Pawel Kudela, Warsaw Univ. of Technology (Poland)
Pawel Malinowski, Institute of Fluid-Flow Machinery (Poland)
Wieslaw Ostachowicz, Institute of Fluid-Flow Machinery (Poland)
Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 9805:
Health Monitoring of Structural and Biological Systems 2016
Tribikram Kundu, Editor(s)

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