The IEEE Standard on piezoelectricity defines the electromechanical coupling factor (k) in static conditions as the ratio between the energy converted from electric to mechanic form or viceversa. Recently, the authors have shown that this definition can be extended also to dynamic cases, by analysing a rod piezoelectric element by means of a 1D distributed model. In this work, the dynamic coupling factor is computed for cylinder shaped piezoceramic elements of different aspect ratios by using classical 1D models and a 3D analytical model. It is shown that it can be correlated to the effective electromechanical coupling factor (keff) for any aspect ratio.
Behaviour of the electromechanical coupling factor of cylinder shaped piezoceramics with different aspect ratios
IULA, Antonio;
2002-01-01
Abstract
The IEEE Standard on piezoelectricity defines the electromechanical coupling factor (k) in static conditions as the ratio between the energy converted from electric to mechanic form or viceversa. Recently, the authors have shown that this definition can be extended also to dynamic cases, by analysing a rod piezoelectric element by means of a 1D distributed model. In this work, the dynamic coupling factor is computed for cylinder shaped piezoceramic elements of different aspect ratios by using classical 1D models and a 3D analytical model. It is shown that it can be correlated to the effective electromechanical coupling factor (keff) for any aspect ratio.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
