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This research investigates both the steady-state and transient dynamic characteristics of polyvinylidene fluoride (PVDF), which is one of the most commonly used piezoelectric polymers. In steady-state vibration, the visible resonant mode fringe patterns are obtained using the amplitude-fluctuation electronic speckle pattern interferometry experiment, and the point-wise displacement data are measured by laser Doppler vibrometer–dynamic signal analysis. Finite element analysis is also performed, and the numerical results are compared with the experimental ones for the steady-state vibration. In a transient dynamic experiment, the history of dynamic impact generated by a steel ball is measured by the PVDF, and the experimental results are compared with the theoretical results obtained by the Hertz contact law. The comprehensive information about steady-state and transient dynamic properties of PVDF membranes obtained in this study is expected to contribute to the further development of the PVDF piezoelectric element.
Details
Signal analysis;
Thin films;
Vibration;
Piezoelectricity;
Dynamic characteristics;
Polyvinylidene fluorides;
Speckle patterns;
Diffraction patterns;
Laser doppler vibrometers;
Electronic speckle pattern interferometry;
Steady state;
Aluminum;
Measurement techniques;
Skin;
Fluorides;
Mechanics;
Composite materials;
Strain gauges;
Interferometry;
Fourier transforms;
Experiments;
Sensors;
Finite element analysis;
Acoustics
; Yu-Hsi, Huang 2 ; Chien-Ching, Ma 2 ; Chun-Kai, Chang 2 1 Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University , Keelung, Taiwan, Republic of China
2 Department of Mechanical Engineering, National Taiwan University , Taipei, Taiwan, Republic of China