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
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.
