Broadband and multiband vibration mitigation in lattice metamaterials with sinusoidally-shaped ligaments

Yanyu Chen, Feng Qian, Lei Zuo, Fabrizio Scarpa, Lifeng Wang*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

35 Citations (Scopus)
558 Downloads (Pure)

Abstract

Engineering the architectures of materials is a new approach to obtain unusual properties and functionalities in solids. Phononic crystals with periodically architected microstructures and compositions exhibit omnidirectional phononic band gaps, offering a unique capability to steer mechanical wave propagation. The coupled architecture-material design strategy, however, poses a significant challenge to design phononic crystals with broadband and multiband vibration control capabilities. Here we propose and demonstrate a new metamaterial design concept in which symmetry-broken ligaments with ordered topology are taken as the constitutive elements for regular lattice materials. Through integrative computational modeling, 3D printing, and vibration testing we demonstrate that the proposed lattice metamaterials can exhibit broad and multiple omnidirectional band gaps over a wide range of the geometry parameters that define the ligament. We show that the designed microstructure of the lattice metamaterial is robust and can be extended to baseline lattices with other topologies.

Original languageEnglish
Pages (from-to)24-32
Number of pages9
JournalExtreme Mechanics Letters
Volume17
Early online date4 Oct 2017
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • Metamaterials
  • Lattice materials
  • Vibration control
  • Band gaps
  • 3D printing

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