Abstract
Abstract A convex-like one-dimensional holey phononic crystal (PnC) strip with multiple wide band gaps but simple construction is investigated. By dint of the unique folding topology constituted by deformable L-shaped connectors and rigid lumps, the wide band gaps can exist with a compact spatial size. Moreover, the geometrical parameters are tunable in a large range. A maximum band gap of up to 63% is achievable. These salient merits outweigh the already published counterparts, enabling the proposed PnC strip to be a more promising candidate for engineering applications. Therefore, we are convinced that such a folding strategy of unit cells provides a practicable direction for the further structural design of PnC devices.
Highlights
Phononic crystals (PnCs) that can alter the propagation of acoustic/elastic waves have attracted great attention [1–4]
We propose an original convex-like 1D holey PnC strip
It is very important for the 1D PnC strip since it is sensitive to the polarization of elastic waves
Summary
Phononic crystals (PnCs) that can alter the propagation of acoustic/elastic waves have attracted great attention [1–4]. Conventional holey PnC strips can hardly open large band gaps while keeping a small size, which greatly confines their applications. The results are exactly what we expect: multiple wide band gaps exist in such a simple constitution while keeping a small size, with a large tunable range of geometrical parameters. All these traits are beneficial to improve feasibility, applicability, and reliability, making the proposed PnC strip a potential candidate for low-space applications.
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