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Proceedings Paper

Modeling and characterization of macro-fiber composite transducers for Lamb wave excitation
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Paper Abstract

The paper describes a numerical approach for the analysis of Lamb wave generation in plate structures. Focus is placed on the investigation of macro fiber composite (MFC) actuators and their directivity properties when actuated individually. A local Finite Element model of the electro-mechanical behavior of the actuator/substrate system estimates the distribution of the interface stresses between the actuator and the substrate, which are subsequently provided as inputs to the analytical procedure that estimates the far-field response of the plate. The proposed approach allows handling of complex actuation configurations, as well as the presence of a bonding layer. As an example, the technique is applied to estimate the directional Lamb wave generation of two types of macro fiber composite transducers. The numerical results are validated experimentally by using a Polytec PSV400 MS scanning laser doppler vibrometer. The results suggest the potentials of the approach as a tool for the prediction of the excitation provided by actuators of complex shapes.

Paper Details

Date Published: 8 April 2010
PDF: 12 pages
Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 76501H (8 April 2010); doi: 10.1117/12.847549
Show Author Affiliations
Manuel Collet, FEMTO-ST, CNRS, Univ. de Franche-Comté (France)
Massimo Ruzzene, Georgia Institute of Technology (United States)
Ken Cunefare, Georgia Institute of Technology (United States)
Buli Xu, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 7650:
Health Monitoring of Structural and Biological Systems 2010
Tribikram Kundu, Editor(s)

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