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Manipulating Mechanical Waves Using Programmable Periodic Structures

Grant number: 18/18774-6
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): January 01, 2019
Effective date (End): May 10, 2022
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal researcher:Carlos de Marqui Junior
Grantee:Danilo Beli
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:18/15894-0 - Periodic structure design and optimization for enhanced vibroacoustic performance: ENVIBRO, AP.TEM
Associated scholarship(s):19/22464-5 - Manipulating Elastic Waves Using Topological Modes - Phase I, BE.EP.PD


Mechanical metamaterials have been extensively explored due to their extraordinary properties that allow vibration and acoustic attenuation as well as wave manipulation. The metamaterial term is nowadays employed to designate rationally designed and tailored periodic artificial materials with physical characteristics not found in nature. The presence of a band gap, a frequency range in which vibration disturbances will not propagate through the structure, is a key feature of metamaterials. Band gaps pave the way to create acoustic and vibration barriers at low frequency, seismic shielding, acoustic diode, two-dimensional waveguides and topological insulators. Usually, periodic structures present fixed dynamic behavior after the unit cell designing. Hence, their working frequency range or even their functionality would be only modified with a new design and a new structure fabrication. The periodic structures capabilities could be expressively expanded by tailoring or by reconfiguring the unit cell properties, resulting in tunable band gaps and hence, programmable phononic crystals and metamaterials. Programmable periodic structures can reveals extraordinary potentialities and versatility that cannot be achieved by their passive counterparts. Therefore, this research project aims to investigate smart and programmable phononic crystals and metamaterials to attenuate sound and vibration as well as to manipulate mechanical waves in a more efficient and versatile way. The wave propagation in periodic structures is a rich and dynamic research area with a wide range of open topics that have high potential to solve old engineering problems, to create new technologies and to impact our every-day-life.

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
THOMES, RENAN LIMA; BELI, DANILO; DE MARQUI JUNIOR, CARLOS. Space-time wave localization in electromechanical metamaterial beams with programmable defects. MECHANICAL SYSTEMS AND SIGNAL PROCESSING, v. 167, n. B MAR 15 2022. Web of Science Citations: 0.
BELI, DANILO; ROSA, MATHEUS INGUAGGIATO NORA; DE MARQUI JR, CARLOS; RUZZENE, MASSIMO. Mechanics and dynamics of two-dimensional quasicrystalline composites. EXTREME MECHANICS LETTERS, v. 44, APR 2021. Web of Science Citations: 0.
SOUZA, MARCOS R.; BELI, DANILO; FERGUSON, NEIL S.; ARRUDA, JOSE ROBERTO DE F.; FABRO, ADRIANO T. A Bayesian approach for wavenumber identification of metamaterial beams possessing variability. MECHANICAL SYSTEMS AND SIGNAL PROCESSING, v. 135, JAN 1 2020. Web of Science Citations: 2.
ASSIS, GEORGE F. C. A.; BELI, DANILO; DE MIRANDA JR, EDSON J. P.; CAMINO, JUAN F.; DOS SANTOS, JOSE MARIA C.; ARRUDA, JOSE ROBERTO F. Computing the complex wave and dynamic behavior of one-dimensional phononic systems using a state-space formulation. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, v. 163, NOV 2019. Web of Science Citations: 0.

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