An anisotropic ultrasonic transducer for Lamb wave applications

被引：6
|
作者：
Zhou, Wensong [1 ,2 ]
Li, Hui [1 ,2 ]
Yuan, Fuh-Gwo [3 ]
机构：
[1] Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, 73 Huanghe Rd, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Sch Civil Engn, 73 Huanghe Rd, Harbin 150090, Peoples R China
[3] North Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA
来源：
SMART STRUCTURES AND SYSTEMS | 2016年 / 17卷 / 06期
基金：
美国国家科学基金会;
关键词：
ultrasonic transducer; anisotropic; sensing property; ultrasonic applications;
D O I：
10.12989/sss.2016.17.6.1055
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An anisotropic ultrasonic transducer is proposed for Lamb wave applications, such as passive damage or impact localization based on ultrasonic guided wave theory. This transducer is made from a PMNPT single crystal, and has different piezoelectric coefficients d(31) and d(32), which are the same for the conventional piezoelectric materials, such as Lead zirconate titanate (PZT). Different piezoelectric coefficients result in directionality of guided wave generated by this transducer, in other words, it is an anisotropic ultrasonic transducer. And thus, it has different sensitivity in comparison with conventional ultrasonic transducer. The anisotropic one can provide more information related to the direction when it is used as sensors. This paper first shows its detailed properties, including analytical formulae and finite elements simulations. Then, its application is described.
引用
收藏
页码：1055 / 1065
页数：11
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