Elastic metamaterial rod for mode filtering in ultrasonic applications

被引：9

作者：

Sikundalapuram Ramesh, S. K. ^{[1
]}

Chitnaduku Thippeswamy, M. ^{[1
]}

Rajagopal, P. ^{[1
]}

Balasubramaniam, K. ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Ctr Nondestruct Evaluat, Chennai 600036, Tamil Nadu, India

来源：

ELECTRONICS LETTERS | 2020年 / 56卷 / 19期

关键词：

biomedical ultrasonics; metamaterials; ultrasonic transducers; ultrasonic materials testing; nondestructive testing; ultrasonic applications; numerical analysis; elasticity; elastic metamaterial rod; nondestructive evaluation; torsional modes; flexural modes; longitudinal modes; low-frequency ultrasound regime; mode filtering;

D O I：

10.1049/el.2020.1576

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The proposed 1D elastic metamaterial rod finds application in non-destructive evaluation, as a filter in the transduction side, where only the torsional and flexural modes need to be generated by isolating longitudinal modes. In this Letter, this is achieved by obtaining a wide bandgap in low-frequency ultrasound regime. The novelty of the proposed design arises from the use of a high impedance mismatch between the materials selected for the rod. The proposed concept is demonstrated and verified with numerical simulations. The effectiveness of the proposed technique is confirmed by comparing the results obtained from the rod made of a single material.

引用

页码：1024 / 1026

页数：3

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