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| ACTIVE CONTROL ON INTERFACE STATE AND DEFECT PROTECTION OF ELASTIC WAVE METAMATERIALS |
| Wen-Jing Wen-JingSun,Yi-Ze Yi-ZeWang |
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Abstract It is found that the hexagonal cell is a common repeating unit with dynamical topological properties in the wave periodic structure. In this work, a hexagonal cell is designed with active control properties. Piezoelectric patches are attached to unit cells and negative capacitance circuits are connected to regulate material parameters. Then, the active control on topological interface transmission and defect protection are achieved. Moreover, the defect protection depends on the structure direction. This investigation introduces the topological concepts of physics and acoustics into the elastic wave metamaterial plate, which can obtain the topological properties and actively controllable characteristics of flexural waves.
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Received: 27 April 2021
Published: 19 April 2022
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Corresponding Authors:
Yi-Ze Yi-ZeWang
E-mail: wangyize@tju.edu.cn
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2022, Vol. 43 
