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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
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A multi-wave elastic metamaterial based on degenerate local resonances
Matthieu Rupin1, Philippe Roux2
1Liphy, Université Grenoble Alpes, CNRS, 38402 Saint Martin d'Hères, France matthieu.rupin@univ-grenoble-alpes.fr.
The Journal of the Acoustical Society of America
|August 3, 2017
Summary
This study explores how symmetric resonators affect Lamb waves in metallic plates. The resonators enable tuning to specific wave types, advancing metamaterial development for elastic waves.
Area of Science:
- Acoustics and Materials Science
- Metamaterials and Wave Propagation
Background:
- Lamb waves are crucial for non-destructive testing and structural health monitoring in thin plates.
- Locally resonant metamaterials offer unique wave manipulation capabilities.
Purpose of the Study:
- To investigate the influence of symmetric resonators on Lamb wave propagation in metallic plates.
- To demonstrate the selective coupling of resonators to specific Lamb wave modes (S0 or A0).
Main Methods:
- Experimental fabrication and testing of metallic plates with integrated symmetric resonators.
- Numerical simulations to model wave propagation and resonator interactions.
Main Results:
- Symmetric resonators create degenerate flexural resonances.
- Resonator symmetry allows selective coupling with either symmetric (S0) or anti-symmetric (A0) Lamb modes.
Conclusions:
- Symmetric resonators provide a tunable mechanism for controlling Lamb wave propagation.
- This method opens new avenues for designing metamaterials with tailored elastic wave interactions.
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