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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Magnetoactive Acoustic Metamaterials.

Kunhao Yu¹, Nicholas X Fang², Guoliang Huang³

¹Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA, 90089, USA.

Advanced Materials (Deerfield Beach, Fla.)

|April 12, 2018

Summary

This summary is machine-generated.

Stimuli-responsive acoustic metamaterials utilize magnetic fields to switch parameters, enabling 3D phase space control. This innovation allows for rapid, reversible modulation of acoustic properties for advanced applications.

Keywords:

acoustic metamaterials double negative magnetoactive materials negative index

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Area of Science:

Acoustic Metamaterials
Solid-State Physics
Materials Science

Background:

Acoustic metamaterials offer unique properties like negative modulus or mass density for applications such as sonic cloaking and noise cancellation.
Conventional metamaterials have fixed frequency-dependent properties due to static structures, limiting their tunability.
The fixed nature of traditional acoustic metamaterials restricts their constitutive parameters to a 2D phase space.

Purpose of the Study:

To demonstrate stimuli-responsive acoustic metamaterials with extended 3D phase space capabilities.
To achieve rapid and reversible switching of constitutive parameters using remote magnetic fields.
To explore novel applications in acoustic manipulation through dynamic parameter control.

Main Methods:

Utilized a model system of magnetoactive lattice structures.
Employed theoretically predicted magnetic fields to induce lattice buckling.
Integrated magnetically triggered negative modulus with cavity-induced negative density.

Main Results:

Successfully extended the 2D phase space of acoustic metamaterials to 3D through dynamic parameter switching.
Demonstrated reversible switching of the effective modulus between positive and negative states.
Achieved flexible switching between single-negative and double-negative acoustic properties.

Conclusions:

The developed magnetoactive lattice structures enable remote, rapid, and reversible control over acoustic metamaterial properties.
This strategy significantly enhances the tunability and applicability of acoustic metamaterials.
Opens new possibilities for advanced acoustic manipulation, including subwavelength imaging and focusing.