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Acta Mechanica

, Volume 229, Issue 6, pp 2647–2655 | Cite as

A design of elastic metamaterials with multi-negative pass bands

  • Sheng Sang
  • Ziping Wang
Original Paper
  • 105 Downloads

Abstract

In this paper, an elastic metamaterial is proposed by integrating a two-dimensionally periodic honeycomb lattice and tetrachiral metamaterial inclusions for low-frequency wave applications. Plane wave propagation in infinite periodic cells is investigated through using Floquet–Bloch principles and the finite element method. Two separate negative pass bands induced by different mechanisms appear in the band structures of wave propagation in the proposed elastic metamaterial. The working mechanisms of those two negative pass bands are revealed though analyzing the eigenmodes of the unit cell and the dynamic effective material properties. Numerical examples validate the proposed model and show that negative refraction of elastic waves in the elastic metamaterial has been obtained. The design concept of this type of elastic may be of use for the design of broadband flat lenses for elastic wave focusing.

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Notes

Acknowledgements

The work carried out in this report is partially funded and supported by National Natural Science Foundation of China (Grants No. 11402101).

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of System EngineeringUniversity of Arkansas at Little RockLittle RockUSA
  2. 2.Faculty of Civil Engineering and MechanicsJiangsu UniversityZhenjiangChina

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