ACTIVE VIBRATION CONTROL OF DELAMINATED COMPOSITE PLATES USING ACTIVE FIBER PATCHES AS ACTUATORS AND SENSORS

This article presents a finite element investigation of transient behavior and active vibration control in a delaminated composite plate equipped with an Active Fiber Composite (AFC) actuator. The deformation characteristics of both intact and delaminated sections are modeled using First-Order Shear Deformation Theory (FSDT). A numerical model incorporating a centrally positioned delamination is formulated and implemented in MATLAB using eight-noded serendipity elements with five degrees of freedom per node. The systems governing equations are derived via the principle of minimum total potential energy. An active velocity feedback control algorithm, defined by gain parameter (Gv), is applied to attenuate unwanted vibrations. Parametric analyses are performed to study the effects of boundary conditions, AFC patch location, delamination size, and feedback gain on the dynamic and frequency response of the composite plate.