Large amplitude free vibration of electrically actuated nanobeams with surface energy and thermal effects

In this paper, large amplitude free vibration of electrically actuated nanobeams with consideration of surface energy, temperature change and Casimir force is studied. Results show that neglecting of surface energy and intermolecular Casimir force will result in a lower prediction and a higher prediction of fundamental frequency, respectively. Thermal effect may change the relationship between fundamental frequency and applied voltage. In addition, the effect of geometric nonlinear deformation on the fundamental frequency is more significant for large applied voltage. The influence of surface energy and geometric nonlinear deformation on the fundamental frequency depends on the length and height of the nanobeams.