Study on the attributes of transverse surface waves in a layered piezoelectric semi-space with surface elasticity theory and extended stroh formalism

Wang，Xuan1; Zhou，Jiashun1; Chen，Qiang1; Huang，Kefu1; Xue，Yahui1,2

2024-09-01

10.1016/j.tws.2024.112084

Thin-Walled Structures   影响因子和分区

0263-8231

Previous works on surface acoustic wave sensors have shown great limitations in selecting piezoelectric materials and the wave propagation direction. To eliminate such limitations in the technological revolution of SAW sensors, the current paper's main purpose is to explore how wave propagation orientation affects the performance of SAW macro- and nano-sensors. Based on Extended Stroh formalism, the theoretical forms are derived and exploited to present the wavenumber of transverse waves in an arbitrary direction of the piezoelectric medium. Furthermore, we consider surface elasticity theory to acquire the phase velocity equation on the basis of the expression of the wavenumber. More intuitively, a physical model is set up to obtain the horizontal shear stiffness of the surface and bulk layers. Then, the numerical case is carried out to determine the relationship between phase velocity and wave propagation orientation. By comparing the numerical study and the physical model, it can be found that the empirical formula of shear stiffness for bulk and surface layers offers a helpful route to precisely predict the mechanical attributes of SAW macro- and nano-sensors, respectively. The summaries of the current theoretical work benefit the manufacturing of surface acoustic wave sensors with improved performance.

Horizontal shear stiffness Phase velocity Surface elasticity Transverse surface waves

SCI ; EI

英语

第一 ; 通讯

20242316218574

Acoustic surface wave devices ; Acoustic wave propagation ; Acoustic waves ; Elasticity ; Piezoelectricity ; Shear flow ; Stiffness ; Surface waves

Fluid Flow, General:631.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electromagnetic Waves in Different Media:711.1 ; Acoustic Waves:751.1 ; Acoustic Devices:752.1 ; Materials Science:951

ENGINEERING

2-s2.0-85195175699

Scopus

1.Department of Mechanics and Aerospace Engineering,Center for Complex Flows and Soft Matter Research,Southern University of Science and Technology (SUSTech),ShenZhen,Guangdong,518055,China
2.Nanchang Innovation Institute,Peking University,Nanchang,Jiangxi,330096,China

Wang，Xuan,Zhou，Jiashun,Chen，Qiang,et al. Study on the attributes of transverse surface waves in a layered piezoelectric semi-space with surface elasticity theory and extended stroh formalism[J]. Thin-Walled Structures,2024,202.

Wang，Xuan,Zhou，Jiashun,Chen，Qiang,Huang，Kefu,&Xue，Yahui.(2024).Study on the attributes of transverse surface waves in a layered piezoelectric semi-space with surface elasticity theory and extended stroh formalism.Thin-Walled Structures,202.

Wang，Xuan,et al."Study on the attributes of transverse surface waves in a layered piezoelectric semi-space with surface elasticity theory and extended stroh formalism".Thin-Walled Structures 202(2024).