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Article type: Research Article
Authors: Yixiang, Biana | Jinhao, Qiub; *
Affiliations: [a] College of Mechanical Engneering, Yangzhou University, Yangzhou, 225127, China | [b] Key lab of Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Correspondence: [*] Corresponding author. E-mail: qiu@nuaa.edu.cn
Abstract: The metal core piezoelectric fiber (MPF) is one of the new type piezoelectric devices for sensors and actuators. To investigate the dynamic characteristics of a cantilever MPF, the dynamic admittance matrix is established. It can describe the response of a cantilever MPF subjected to driving parameters, a harmonically varying axial force F at the tip and a harmonically varying voltage V on the electrodes. The responses parameters of a cantilever MPF, including a dynamic tip elongation δ and a dynamic electric charge Q, can be obtained using the vibration theory and the average distributed electrical charge method. The response parameters are related to the driving parameters by a 2 × 2 matrix. The dynamic models for measuring piezoelectric parameters of a MPF are given in order to illustrate the applications of the previous dynamic admittance matrix. The piezoelectric parameters, the elastic coefficient s_{11}^E , the piezoelectric coefficient d_{31} and the dielectric constant ε _{33}^T of MPF were measured experimentally.
Keywords: Metal core, piezoelectric fiber, dynamic admittance matrix, piezoelectric parameters, measurement
DOI: 10.3233/JAE-2011-1332
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 35, no. 3, pp. 189-200, 2011
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