Affiliations: State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Correspondence:
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Corresponding author: Yajun Luo, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, NO. 28, West Xianning Road, Xi'an 710049, Shaanxi, China. Tel.: +86 29 8266 5721; E-mail:luoyajun@mail.xjtu.edu.cn
Abstract: In this paper, a multi-layer piezoelectric structure
(MPS) is designed as a sensor with multi-channel and high-output properties.
It is bonded onto the surface of a cantilever, and then the FEM modeling and
simulations are developed. The mathematical formulation of the model is
based on the shear deformation beam theory because of the large thickness of
MPS. Furthermore, the FEM model is obtained based on the Hamilton's
principle and the finite element method. The effects of some key parameters
such as the number of piezoelectric layers, the thickness of per
piezoelectric patch and that of per adhesive layer are analyzed on the
sensing property of the MPS. Finally, a contrast experiment is also
finished. The results have shown that this novel piezoelectric structure has
a clear sensing advantage. It is helpful for designing the piezoelectric
balance sensor or the piezoelectric vibration energy harvesting structure.
Keywords: Multi-layer piezoelectric structure, sensor, finite element method
