Frequency-dependent acoustic energy focusing in hexagonal ceramic micro-scaffolds

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00517863" target="_blank" >RIV/61388998:_____/20:00517863 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/20:00344891
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0165212519300149" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0165212519300149</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.wavemoti.2019.102417" target="_blank" >10.1016/j.wavemoti.2019.102417</a>

Result language
angličtina
Original language name
Frequency-dependent acoustic energy focusing in hexagonal ceramic micro-scaffolds
Original language description
Acoustic properties of an additive-manufactured SiC scaffold with hexagonal symmetry fabricated by the robocasting method are studied both numerically and experimentally. The numerical analysis is based on the finite element method (FEM) using Bloch boundary conditions. The calculations show both angular and frequency dispersion of the acoustic waves with wavelengths comparable to the spacing between the rods, i.e., on a millimeter scale, indicating interesting acoustic properties in the MHz range. The dispersion character leads to focusing of the energy propagation into the directions of the rods of the hexagonal structure. This is illustrated by modal-based calculations of the propagation of longitudinal and out-of-plane shear wave packets with a dominant wavelength. The experimental analysis consists of two steps, the measurement of the resonant spectrum and shear wave propagation character. The measured resonant spectrum is in good agreement with the one calculated using numerically obtained low-frequency properties of the structure, also showing the quality of the overall manufactured structure. The time-domain measurement shows significant changes in the energy propagation between low and high frequencies, as predicted by FEM calculations.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10307 - Acoustics

Project
<a href="/en/project/GA17-01618S" target="_blank" >GA17-01618S: Fluid Acoustics in Periodic Micro-Architectures</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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