Phononic properties of hexagonal chiral lattices

被引：299

作者：

Spadoni, Alessandro ^{[1
]}

Ruzzene, Massimo ^{[1
]}

Gonella, Stefano ^{[2
]}

Scarpa, Fabrizio ^{[3
]}

机构：

[1] Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA

[2] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[3] Univ Bristol, Dept Aerosp Engn, Bristol, Avon, England

来源：

WAVE MOTION | 2009年 / 46卷 / 07期

关键词：

Chiral lattices; Wave propagation; Phononic materials; Wave-guiding; Band gaps; Caustics; DESIGN; CRYSTALS;

D O I：

10.1016/j.wavemoti.2009.04.002

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The manuscript reports the outcome of investigations on the phononic properties of a chiral cellular structure. The considered geometry features in-plane hexagonal symmetry, whereby circular nodes are connected through six ligaments tangent to the nodes themselves. in-plane wave propagation is analyzed through the application of Bloch theorem, which is employed to predict two-dimensional dispersion relations as well as illustrate dispersion properties unique to the considered chiral configuration, Attention is devoted to determining the influence of unit cell geometry on dispersion, band gap occurrence and wave directionality. Results suggest cellular lattices as potential building blocks for the design of meta-materials of interest for acoustic wave-guiding applications. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：435 / 450

页数：16

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