Composite 3D-printed metastructures for low-frequency and broadband vibration absorption.

ABSTRACT: Architected materials that control elastic wave propagation are essential in vibration mitigation and sound attenuation. Phononic crystals and acoustic metamaterials use band-gap engineering to forbid certain frequencies from propagating through a material. However, existing solutions are limited in the low-frequency regimes and in their bandwidth of operation because they require impractical sizes and masses. Here, we present a class of materials (labeled elastic metastructures) that supports the formation of wide and low-frequency band gaps, while simultaneously reducing their global mass. To achieve these properties, the metastructures combine local resonances with structural modes of a periodic architected lattice. Whereas the band gaps in these metastructures are induced by Bragg scat

SUBMITTER: Matlack KH 

PROVIDER: S-EPMC4968765 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature