Electromechanical nonlinearity of polycrystalline ferroelectrics under resonant excitation

Planar electroelastic vibrations of piezoceramic rectangular plate and half-disk

“…This is because of the small size of piezoelectric elements and the low (submicrometer) amplitudes of vibrations. In [4,6], the amplitude of an end of a narrow piezoceramic rectangular fixed at nodal points and undergoing intensive resonant vibrations in the first longitudinal mode was measured with a capacitive probe, followed by the determination of the dynamic stresses at the fixation points and the ultimate strength of the specimen. The efficient method developed by the author many years ago for experimental stress analysis of thin-walled piezoceramic elements made it possible to carry out unique studies of forced resonant vibrations of various piezoelectric specimens.…”

Influence of the Geometry of a Piezotransformer Transducer on Its Electric Potential During Electroelastic Vibrations of a Piezoceramic Disk

“…This is because of both small dimensions of piezoelements and small amplitudes (fractions of a micrometer) of their vibrations. The authors of [1,12] used a capacitive probe to measure the amplitude of the end of a narrow piezoceramic rectangle fixed at the corners under intensive resonant vibrations in the first longitudinal mode and then calculated the dynamic stresses at the fixation points and the ultimate strength of the specimen. The piezotransformer-transducer method makes it possible to determine, with an uncertainty of no greater than 3-5%, the sum of principal mechanical stresses at any point of a thin piezoceramic element and for any level of electric or mechanical loading [3][4][5].…”