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Proceedings Paper

Gradient-index based smart metacomposite for elastic wave focusing (Conference Presentation)
Author(s): Kaijun Yi; Manuel Collet
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Paper Abstract

We designed and analyzed a piezo-lens to focus flexural waves in thin plates. The piezo-lens comprises a host plate and piezoelectric patches bonded on the surfaces of the plate. The piezoelectric patches are shunted with negative capacitance circuits. The effective refractive indexes inside the piezo-lens are designed to fit a hyperbolic secant distribution by tuning the negative capacitance values. A homogenized model of piezo-mechanical system is adopted in the designing process of the piezo-lens. The wave focusing effect is studied by the finite element method. Numerical results show that the piezo-lens can focus flexural waves by bending their trajectories, and is effective in a large frequency band. The piezo-lens has the ability to focus flexural waves at different locations by tuning the shunting negative capacitance values. Potential applications of the piezo-lens include energy harvesting, SHM, etc.

Paper Details

Date Published: 11 May 2017
PDF: 1 pages
Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101701M (11 May 2017); doi: 10.1117/12.2263342
Show Author Affiliations
Kaijun Yi, LTDS, ECL (France)
Manuel Collet, CNRS (France)

Published in SPIE Proceedings Vol. 10170:
Health Monitoring of Structural and Biological Systems 2017
Tribikram Kundu, Editor(s)

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