W-shaped Broadband Attenuation of Longitudinal Waves through Composite Elastic Metamaterial

Abstract

We investigate a composite elastic meta-slab with exceptional transmission properties, particularly the presence of a W-shaped bandgap. A comprehensive study, utilizing experimental measurements, the finite element method, and an analytical approach, identifies this specific bandgap. The meta-slab design involves cutting an array of composite materials arranged in parallel with strategically placed incisions. This configuration ensures that the materials between the slits act as plate-like waveguides within the surrounding medium. The incorporation of steel into ABS-based Fabry-Perot cavities induces a notable coupling effect between longitudinal waves and localized modes traversing the structure, leading to the formation of two distinct Fabry-Perot resonators. These coupling effects generate a series of resonances and antiresonances, ultimately producing the W-band gap through the interaction of two symmetric Fano resonances.

This work was published in the journal Composites Part B: Engineering

References in corpus (4)

• Mapping of Elastic Properties of Twisting Metamaterials onto Micropolar Continuum using Static Calculations
• The emergence of low-frequency dual Fano resonances in chiral twisting metamaterials
• Longitudinal-Twist Wave Converter based on Chiral Metamaterials
• Subwavelength sound screening by coupling space-coiled Fabry-Perot resonators