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.
Keywords
Cite
@article{arxiv.2503.21786,
title = {W-shaped Broadband Attenuation of Longitudinal Waves through Composite Elastic Metamaterial},
author = {B. Lemkalli and K. K. Dudek and M. Kadic and Q. Ji and S. Guenneau and A. Mir and Y. Achaoui},
journal= {arXiv preprint arXiv:2503.21786},
year = {2025}
}
Comments
This work was published in the journal Composites Part B: Engineering