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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Wave propagation in elastic metamaterial beams and plates with interconnected resonators

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Author(s):
Beli, D. [1] ; Arruda, J. R. F. [1] ; Ruzzene, M. [2, 3]
Total Authors: 3
Affiliation:
[1] State Univ Campinas UNICAMP, Sch Mech Engn, Rua Mendeleyev 200, Cidade Univ Zeferino Vaz, BR-13083860 Campinas, SP - Brazil
[2] Georgia Inst Technol, Daniel Guggenhein Sch Aerosp Engn, 270 Ferst Dr, Atlanta, GA 30332 - USA
[3] Georgia Inst Technol, George W Woodruff Sch Mech Engn, 801 Ferst Dr, Atlanta, GA 30332 - USA
Total Affiliations: 3
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES; v. 139, p. 105-120, MAY 15 2018.
Web of Science Citations: 20
Abstract

In this work, new beam and plate metamaterials with interconnected local resonators are proposed. This design promotes the splitting and coupling between transverse and rotational vibration modes of the resonator chain. It produces a particular band structure with two band gaps: a wide band gap opens at the in-phase transverse natural frequency of the resonator chain and a second band gap, with narrower width, appears at higher frequencies. The Timoshenko beam and Mindlin-Reissner plate models are used to compute the band structure as well as the dynamic forced response. A parametric analysis of the band gaps is performed by varying the interconnection properties. The metamaterial plate presents a directional wave propagation pattern due to partial band gaps. In addition, a metamaterial beam manufactured by additive manufacturing is investigated. The experimental results are in agreement with the numerical predictions. Therefore, the proposed concept showed to be promising for metamaterial design aiming at creating singular band gaps with broadband absorption and directional/focalization features. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 15/15718-0 - Dynamic Behavior of Beam and Plate Metamaterials with Fluid-Structure Interaction
Grantee:Danilo Beli
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 14/19054-6 - Design of periodic structures with application to phononic crystals and acoustic metamaterials
Grantee:Danilo Beli
Support Opportunities: Scholarships in Brazil - Doctorate