In the IEEE Standard on piezoelectricity the electromechanical coupling factor is defined in static conditions as the ratio between the converted and the total energy involved in a transfor-mation cycle (kmat). In this work we show that this definition can also be extended to dynamic cases: by means of 1–D models we demonstrate that, for loss less piezoelectric elements vi-brating in the rod (longitudinal) or width (transverse) mode, the k factor can be defined as the square root of the ratio between the converted electric energy and the kinetic total energy; the obtained results are proportional to the appropriate kmat.
N., L., A., I., R., C., Caliano, G., Pappalardo, M. (2002). The electromechanical coupling factor for longitudinal and transverse propagation modes. REVISTA DE ACÚSTICA, XXXIII(3-4).
The electromechanical coupling factor for longitudinal and transverse propagation modes
CALIANO, Giosue';
2002-01-01
Abstract
In the IEEE Standard on piezoelectricity the electromechanical coupling factor is defined in static conditions as the ratio between the converted and the total energy involved in a transfor-mation cycle (kmat). In this work we show that this definition can also be extended to dynamic cases: by means of 1–D models we demonstrate that, for loss less piezoelectric elements vi-brating in the rod (longitudinal) or width (transverse) mode, the k factor can be defined as the square root of the ratio between the converted electric energy and the kinetic total energy; the obtained results are proportional to the appropriate kmat.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
