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Composites with Piezoceramic Fibers and Interdigitated Electrodes in Vibration Control

Pietrzakowski M.

Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica

2003

T. 22, z. 3

375-380

The study concerns active suppression of structural vibrations of laminated plates. The configuration of the proposed control device is based on the piezoceramic fiber composite layers equipped with the interdigitated electrodes and used as actuators and sensors. This type of hybrid composites with the poling direction along the fibers offers an increase of the predominant unidirectional actuation effect and also the orthotropy of electromechanical properties comparing with the traditional piezoceramic fiber composites. The effective composite properties are obtained due to the uniform field method by combining the material phases properties according to the rules of mixtures. The steady-state behavior of the actively damped laminated plate is analyzed. The governing equations are formulated for a non-zero skew angle between the natural axes of the piezoelectric composite materiał and the plate reference axes. The numerical simulations are focused on the influence of the piezoceramic arrangement on the control potential of the considered system.

Transverse Actuation of Laminated Plates via Active Layers with Piezoceramic Fibers

Pietrzakowski M.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

2002

z. 60 [197]

497-505

In the paper the problem of orthotropic actuation of transverse structural vibrations using the Interdigitated Electrode Piezoelectric Fiber Composites (IDEPFCs) is analysed. The system considered is a thin symmetrically laminated rectangular plate with the embedded active IDEPFC layers or patches glued to the plate surfaces. The uniform fields approach is applied to derive the electromechanical constitutive relations and to model the piezoelectric device effective properties. The governing equation of the plate motion induced by the actuators supplied with an external voltage is formulated and solved for the steady-state case and simply supported boundary conditions. The influence of the piezoceramic material fraction and the active composite architecture including an orientation of the principal material axes on the dynamic response of the system is numerically examined and discussed.