Use of anisotropy to guide acoustic waves along desired trajectories

Aref Tehranian; Alireza V. Amirkhizi; Sia Nemat-Nasser

doi:10.1117/12.847733

8 April 2010 Use of anisotropy to guide acoustic waves along desired trajectories

Aref Tehranian, Alireza V. Amirkhizi, Sia Nemat-Nasser

Proceedings Volume 7650, Health Monitoring of Structural and Biological Systems 2010; 76500B (2010) https://doi.org/10.1117/12.847733
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

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.

Citation Download Citation

Aref Tehranian, Alireza V. Amirkhizi, and Sia Nemat-Nasser "Use of anisotropy to guide acoustic waves along desired trajectories", Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 76500B (8 April 2010); https://doi.org/10.1117/12.847733

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available