Effect of external electrorheological damper on dynamic buckling behavior of a metallic plate

In this study، dynamic buckling of a metallic plate with external electrorheological (ER) damper is investigated using the finite element method. The stability region and load carrying capacity of the metallic plate is improved by applying an external ER damper to the plate. The post yield behavior of the ER fluid (nonlinear behavior) is considered for modelling the ER damper. ER fluids are a class of smart fluids that their mechanical behavior is changed considerably in miliseconds by applying the electric field. In another word، applying the electric field increases the viscosity of the smart fluid. This behavior lead to an increase in the damping of the structure. Consequently، the stability of the system increases. Different parameters such as the intensity of the applied electric field and the geometric properties of the external ER damper can affect the stability regions of the structure. The effect of these parameters on the stability of the metallic plate is investigated in the present study.