https://doi.org/10.1140/epjb/s10051-024-00834-w
Regular Article - Solid State and Materials
Experimental verification of latticed acoustic metamaterials with pentamode to bandgap characteristics
1
School of Naval Architecture and Ocean Engineering, Dalian Maritime University, 116026, Dalian, China
2
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, 116024, Dalian, China
3
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, 116024, Dalian, China
Received:
1
October
2024
Accepted:
22
November
2024
Published online:
8
December
2024
Pentamode and bandgap characteristics of metamaterials are of great significance to the control of elastic wave propagation by acoustic metamaterials. Pentamode metamaterials are artificially designed solid structures that exhibit fluid-like behavior. The bandgap characteristic of metamaterials effectively hinders the propagation of elastic waves. A latticed metamaterial with pentamode characteristics is proposed, achieving bandgap features by altering the positions of nodes between arms in the unit structures. This study aims to experimentally verify the pentamode and bandgap characteristics of acoustic metamaterials. Finite element analysis using COMSOL Multiphysics and underwater experiments with three models theoretically and experimentally validate the ability of latticed metamaterials to control elastic wave propagation under various parameters. By examining the band structure, the propagation of acoustic waves within the pentamode domain (10–20 kHz) for pentamode model and bandgap domain (5–10 kHz) for bandgap models are assessed. The experimental results agree with the theoretical simulations. The pentamode and bandgap characteristics of the latticed metamaterials have a broad development prospect in acoustic detection.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
