| Texto completo | |
| Autor(es): |
Caetano, Virgilio Junior
;
de Marqui Junior, Carlos
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Smart Materials and Structures; v. 34, n. 3, p. 17-pg., 2025-03-01. |
| Resumo | |
This work explores a demultiplexer that realizes the spatial separation of bending waves through temperature-tunable topological interface modes. Unlike fixed-property configurations that split input signals into predetermined frequency components, our proposed reconfigurable setup allows the adjustment of the frequency components according to the temperature. The model consists of a metallic host structure covered by pairs of piezoelectric elements connected to negative capacitance circuits. Additionally, the metamaterial features periodically distributed mass-spring resonators made of shape memory alloy (SMA). The negative capacitance enables modification of the local stiffness of each unit cell. At the same time, the resonance frequency of each mass-spring attachment is controlled by changing the temperature of the SMA springs. After characterizing the topological properties of the proposed unit cell configuration, we numerically investigate a two-channel topologically protected demultiplexer. The results demonstrate the system's capability to extract signals at temperature-tunable frequencies of topological modes with enhanced energy localization. (AU) | |
| Processo FAPESP: | 22/09449-0 - Metaestruturas inteligentes reconfiguráveis para atenuação de vibração e colheita de energia |
| Beneficiário: | Virgilio Junior Caetano |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 18/15894-0 - Projeto e otimização de estruturas periódicas para aprimoramento de desempenho vibroacústico |
| Beneficiário: | Carlos de Marqui Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |