Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Design and analysis of a topological piezoelectric metamaterial beam
Submission Author:
Luis Alfredo Pérez Martínez , SP , Brazil
Co-Authors:
Luis Alfredo Pérez Martínez, Danilo Beli, Carlos De Marqui Junior
Presenter: Luis Alfredo Pérez Martínez
doi://10.26678/ABCM.COBEM2023.COB2023-1700
Abstract
Topological metamaterials present novel properties and phenomena, including topological interface states, energy localization, and robust localization. Topological interface states have been mostly reported in the literature in systems whose polarization transition is due to phononic crystal features of the host structure (Bragg scattering). This paper shows that polarization transition and interface states can be observed in piezoelectric metamaterial beams with interconnected resonant shunt circuits. An electromechanically coupled finite element model is presented. The band structure presents a resonant bandgap and two folding points for a certain unit cell configuration with uncoupled resonant shunt circuits. The conditions for opening bandgaps at the folding points, band inversion, and polarization transition are discussed. The proposed topological metamaterial comprises two media with different circuit interconnection parameters. Topological interface states are evidenced in the band structure and vibration energy localization observed in the forced response.
Keywords
Piezoelectricity, Topological metamaterial, Interface state, Polarization transition
