Transient response of annular sandwich plate with functional graded core combined with piezoelectric layers

In this study, the transient response of the symmetric annular sandwich plate, with functionally graded core and piezoelectric layers, is investigated. It is also assumed that the sandwich plate is under external harmonic force and electrical voltage. Based on the power function model, it is assumed that the properties of the core material vary in the direction of the core thickness. To express the displacement field, the third order shear deformation theory is used. By use of the Hamilton principle, the structural equations are obtained in terms of displacement components and solved using the differential quadrature method. Finally, the time response is evaluated in terms of variations in effective parameters such as internal radius, power function index, core thickness and external voltage. The simulation results presented that with increasing internal radius of plate, the amplitude of the oscillations decreases in the desired time interval. In addition, by increasing the index parameter of the power function, the time response range increases. Finally, by applying external electrical voltage, the vibration amplitude of plate reduced and this advantage is used in control of vibrating systems.