Abstract
We design and experimentally demonstrate a dissipative elastic metamaterial structure that functions as a bandpass filter with a low-frequency passband. The mechanism of dissipation in this structure is well described by a mass-spring-damper model that reveals that the imaginary part of the wavenumber is non-zero, even in the passband of dissipative metamaterials. This indicates that transmittance in this range can be low. A prototype for this viscoelastic metamaterial model is fabricated by 3D printing techniques using soft and hard acrylics as constituent materials. The transmittance of the printed metamaterial is measured and shows good agreement with theoretical predictions, demonstrating its potential in the design of compact waveguides, filters and other advanced devices for controlling mechanical waves.
Highlights
Propagation of waves in heterogeneous or inhomogeneous media is of great importance in scientific and technological research
We19 theoretically proposed an elastic metamaterial with negative effective parameters almost at all frequencies other than for a certain region, which corresponds to the band-pass range
Regarding the potential in the design of small-size waveguides, filters and other devices, the experimental realization of such elastic metamaterials is described in the present work
Summary
Propagation of waves in heterogeneous or inhomogeneous media is of great importance in scientific and technological research. Dissipative elastic metamaterial with a low-frequency passband
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