Converting Lamb modes into shear horizontal waves using a resonance-based metamaterial

Yiran Tian; Yanfeng Shen; Xianggui Qin

doi:10.1117/12.2582306

22 March 2021 Converting Lamb modes into shear horizontal waves using a resonance-based metamaterial

Yiran Tian, Yanfeng Shen, Xianggui Qin

Proceedings Volume 11593, Health Monitoring of Structural and Biological Systems XV; 115930I (2021) https://doi.org/10.1117/12.2582306
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

In this paper, an elastic metamaterial is presented to achieve complete conversion from Lamb modes into the fundamental shear horizontal mode. Modal analysis with Bloch-Floquet boundary condition is performed to obtain the dispersion features of the metamaterial system. By analyzing the resonant modes of the unit cell, a complete SH₀ mode generation band within the A₀ and S₀ modes bandgap can be formed in a wide frequency range. Thereafter, finite element model (FEM) harmonic analyses for an elastic metamaterial plate are carried out to explore the mode conversion efficiency. Finally, a coupled field transient dynamic FEM is constructed to acquire the response of the structure. A 30- count tone burst incident wave containing both A₀ and S₀ modes is excited to propagate into the elastic metamaterial system. The frequency-wavenumber analysis results demonstrate the achievement of the mode conversion behavior, manifested by the strong coupling between guided waves and resonant modes of the composite stubs. The proposed mode conversion behavior may possess great potential in future Structural Health Monitoring (SHM) and Nondestructive Evaluation (NDE) applications. The paper finishes with summary, concluding remarks, and suggestions for future work.

Conference Presentation

Citation Download Citation

Yiran Tian, Yanfeng Shen, and Xianggui Qin "Converting Lamb modes into shear horizontal waves using a resonance-based metamaterial", Proc. SPIE 11593, Health Monitoring of Structural and Biological Systems XV, 115930I (22 March 2021); https://doi.org/10.1117/12.2582306

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available