Journal
SMART MATERIALS AND STRUCTURES
Volume 28, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-665X/ab20fc
Keywords
magnetostrictive patch transducer; detunded resonator; Lamb wave; antisymmetric
Funding
- National Research Foundation of Korea (NRF) - Korean Ministry of Science, ICT and Future Planning (MSIP)
- Institute of Advanced Machinery and Design at Seoul National University in Korea [2014M3A6B3063711, 2016R1A5A1938472]
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We propose a novel method to boost the power of a magnetostrictive patch transducer (MPT) for generating antisymmetric Lamb wave modes in a plate. Because an MPT installed on a plate mainly exerts in-plane deformation onto a test specimen, it cannot efficiently generate antisymmetric wave modes such as the lowest antisymmetric Lamb wave (A(0)) mode, unlike the generation of symmetric wave modes. To achieve the high-power generation of antisymmetric modes, we propose an add-on passive boosting element which is referred to here as a detuned resonator. The resulting MPT can serve both as an actuator and a sensor. Here, we present the specific boosting resonator configuration, explain its operating mechanism, and verify its role in increasing the transducer power. A theoretical analysis and experimental validation are carried out.
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