Vibration of Sandwich Beams with ER Core and Laminated Faces

This study deals with vibration of a sandwich beam with laminated faces and electro-rheological (ER) core. A smart beam element based on Bingham’s model is presented. ER layer is adhered to the laminated composite beam to control vibration of the beam. In contrast to most of previous studies in which a Kevin viscoelastic model has been used, in this study behavior of ER core is modeled based on Bingham’s equation. Both face layers are considered symmetric. Direct integration method is used to calculate transient response of the beam to an initial excitation. Effects of different parameters such as beam geometry, electric field and stacking sequence on natural frequencies and settling time are investigated. Obtained results show that by increasing the intensity of applied electric field and the thickness of ER core, damping properties of the beam improve and its settling time decreases. Moreover, for symmetric faces by increasing the angle of fiber orientation, natural frequencies are decreased.

کلیدواژه ها:

Electrorheological fluid ، Finite element ، Laminate ، Sandwich beam ، Transient response ،