Traveling Lamb wave in elastic metamaterial layer

Haisheng Shu, Lihuan Xu, Xiaona Shi, Lei Zhao, Jie Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

� 2016 Author(s). The propagation of traveling Lamb wave in single layer of elastic metamaterial is investigated in this paper. We first categorized the traveling Lamb wave modes inside an elastic metamaterial layer according to different combinations (positive or negative) of effective medium parameters. Then the impacts of the frequency dependence of effective parameters on dispersion characteristics of traveling Lamb wave were studied. Distinct differences could be observed when comparing the traveling Lamb wave along an elastic metamaterial layer with one inside the traditional elastic layer. We further examined in detail the traveling Lamb wave mode supported in elastic metamaterial layer, when the effective P and S wave velocities were simultaneously imaginary. It was found that the effective modulus ratio is the key factor for the existence of special traveling wave mode, and the main results were verified by FEM simulations from two levels: the level of effective medium and the level of microstructure unit cell.
Original languageEnglish
Article number165103
JournalJournal of Applied Physics
Volume120
Issue number16
DOIs
Publication statusPublished - 28 Oct 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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