Acoustic metamaterial behavior of three-dimensional periodic architectures assembled by robocasting

Ultrasonic measurements combined with numerical modelling are used to analyze the elastic and acoustic properties of morphologically complex ceramic bodies assembled by the Robocasting technique. It is shown that the micromechanics of the robocast periodic scaffolds leads to several metamaterial-lik...

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Bibliographic Details
Published in:Applied physics letters 2014-11, Vol.105 (21)
Main Authors: Kruisová, Alena, Seiner, Hanuš, Sedlák, Petr, Landa, Michal, Román-Manso, Benito, Miranzo, Pilar, Belmonte, Manuel
Format: Article
Language:English
Subjects:
Acoustic properties
Acoustics
Applied physics
Damping
Elastic analysis
Elastic anisotropy
Elastic properties
Mathematical models
Metamaterials
Micromechanics
Periodic variations
Propagation modes
Scaffolds
Three dimensional models
Three dimensional printing
Wave propagation
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Summary:Ultrasonic measurements combined with numerical modelling are used to analyze the elastic and acoustic properties of morphologically complex ceramic bodies assembled by the Robocasting technique. It is shown that the micromechanics of the robocast periodic scaffolds leads to several metamaterial-like wave propagation phenomena. Besides the expectable prominent elastic anisotropy and the frequency band structure resulting from the periodicity of the scaffold, a wave-mode mixing is observed that disables the conventional distinguishing between quasi-longitudinal, quasi-shear, and pure shear modes for propagation in the symmetry planes of the structure. This paper proves the capability of Robocasting, as a versatile three-dimensional (3D) printing method, to produce tailored acoustic metamaterials with very low damping and outstandingly strong acoustic anomalies.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4902810