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Proceedings Paper

Use of anisotropy to guide acoustic waves along desired trajectories
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Paper Abstract

Acoustic stress waves can be guided to follow pre-determined paths in solids, using elastic anisotropy. Recently, there has been intense interest to design materials and structures that can shield specific regions within the material by redirecting the incident stress-waves along desired paths. Some of the proposed techniques involve variable mass density and stiffness. We have designed a material with isotropic mass density but highly anisotropic elasticity that can guide incident waves along desired trajectories. Harmonic excitations are imposed, and it is shown that the stress-wave energy would travel around a protected central region. The model is also evaluated using numerical simulations, which confirm that majority of the stress-wave energy is guided around the central cavity and is delivered exactly to the opposing face in a location corresponding to the incident excitation location.

Paper Details

Date Published: 8 April 2010
PDF: 4 pages
Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 76500B (8 April 2010); doi: 10.1117/12.847733
Show Author Affiliations
Aref Tehranian, Univ. of California, San Diego (United States)
Alireza V. Amirkhizi, Univ. of California, San Diego (United States)
Sia Nemat-Nasser, Univ. of California, San Diego (United States)

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

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