Modulating Lamb waves with a tunable ultrasonic lens

Xiaowei Yin; Yanfeng Shen; Xianggui Qin

doi:10.1117/12.2582495

22 March 2021 Modulating Lamb waves with a tunable ultrasonic lens

Xiaowei Yin, Yanfeng Shen, Xianggui Qin

Proceedings Volume 11593, Health Monitoring of Structural and Biological Systems XV; 115931F (2021) https://doi.org/10.1117/12.2582495
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

This paper presents a tunable ultrasonic lens for the flexible control and modulation of Lamb waves. The lens is comprised of layered slice structures using Shape Memory Alloy (SMA) which could change its material properties under thermal loads. Numerical investigations on the wave dispersion characteristics demonstrate the tuning capability of wave speeds in the slice waveguide. Harmonic and transient dynamic modeling results further present the wave steering and focusing phenomena to a desired direction and focal point, covering a scanning area. Such a capability possesses great application potential to enhance the performance of Lamb wave based SHM and NDE systems.

Conference Presentation

Citation Download Citation

Xiaowei Yin, Yanfeng Shen, and Xianggui Qin "Modulating Lamb waves with a tunable ultrasonic lens", Proc. SPIE 11593, Health Monitoring of Structural and Biological Systems XV, 115931F (22 March 2021); https://doi.org/10.1117/12.2582495

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