Wave propagation in undulated structural lattices

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:97-98

Article

Trainiti, G.¹  Rimoli, J. J.¹  Ruzzene, M.^1,2 

[1] Georgia Inst Technol, Daniel Guggenheim Sch Aerosp Engn, 270 Ferst Dr, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, George W Woodruff Sch Mech Engn, 801 Ferst Dr, Atlanta, GA 30332 USA

关键词: Periodic structures;    Undulated structures;    Graded structural lattices;    Band gaps;    Wave directionality;   

DOI  :  10.1016/j.ijsolstr.2016.07.006

来源: Elsevier

【 摘 要 】

This work investigates wave propagation in undulated square structural lattices. The undulated pattern is obtained by imposing an initial curvature to the lattice's elements. The study considers both periodic undulated structures, in which the undulation is uniform throughout the structure as well as graded undulated patterns, in which the undulation is modulated within the lattice. Undulation is specifically considered in relation to its ability to induce anisotropy in the equivalent mechanical properties and to break the symmetry of the straight square lattice. Results show that wave motion is inhibited within specified frequency ranges owing to the generation of band gaps, and in specific directions as a result of the undulation-induced anisotropy. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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