Focusing guided waves using surface bonded elastic metamaterials

Xiang Yan, Rui Zhu, Guoliang Huang, Fuh Gwo Yuan

Research output: Contribution to journalArticlepeer-review

146 Citations (Scopus)

Abstract

Bonding a two-dimensional planar array of small lead discs on an aluminum plate with silicone rubber is shown numerically to focus low-frequency flexural guided waves. The "effective mass density profile" of this type of elastic metamaterials (EMMs), perpendicular to wave propagation direction, is carefully tailored and designed, which allows rays of flexural A0 mode Lamb waves to bend in succession and then focus through a 7 × 9 planar array. Numerical simulations show that Lamb waves can be focused beyond EMMs region with amplified displacement and yet largely retained narrow banded waveform, which may have potential application in structural health monitoring.

Original languageEnglish
Article number121901
JournalApplied Physics Letters
Volume103
Issue number12
DOIs
Publication statusPublished - 2013 Sept 16

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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