Single-phase elastic metamaterials for wave filtering

Single-phase elastic metamaterials for wave filtering

Azevedo Vasconcelos, A.C. (TU Delft Transport Engineering and Logistics)
Schott, D.L. (TU Delft Transport Engineering and Logistics)
Aragon, A.M. (TU Delft Structural Optimization and Mechanics)
Jovanova, J. (TU Delft Transport Engineering and Logistics)

2021

This paper discusses an elastic metamaterial for filtering energy from certain frequencies of an incoming wave. The unit cell, which is composed by a single material, is built to obtain a local resonance band gap. Since Bloch-Floquet's periodic condition is enforced to the unit cell, the dynamic characteristics of the metamaterial is obtained by only evaluating such structure. The attenuation mechanism is guaranteed by visualizing bandwidths in which the wave propagation is prohibited. Such bandwidths, denoted as band gaps, are observed in the band structure diagram of the unit cell and in the transmissibility loss over the metamaterial. The assemble of unit cells with different internal geometries results in a filtering mechanism. The proposed single-phase metamaterial could be applied in structures requiring vibration control for selective frequencies.

Elastic wave attenuation
Single-phase elastic metamaterials
Wave filtering

http://resolver.tudelft.nl/uuid:2694e097-1fc3-4847-8db5-791908f4367c

https://doi.org/10.1115/SMASIS2021-68283

ASME

2022-04-20

978-0-7918-8549-9

Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021

ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021, 2021-09-14 → 2021-09-15, Virtual, Online

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Institutional Repository

conference paper

© 2021 A.C. Azevedo Vasconcelos, D.L. Schott, A.M. Aragon, J. Jovanova