Size-dependent dynamic analysis of rectangular nanoplates in the presence of electrostatic, Casimir and thermal forces

Abstract

• The size dependent dynamic instability of fully clamped nanoplates is obtained. • The effects of Casimir forces as well as temperature change are examined. • Eringen's nonlocal theory is applied along with CLT to obtain the equation. • The dynamic governing equation is solved numerically by Galerkin method. In the present study by considering the small-scale effects, the dynamic instability of fully clamped and simply supported nanoplates is studied in the attendance of electrostatic, Casimir as well as thermal forces. To this end, by applying the nonlocal elasticity theory of Eringen along with the classical plate theory, the dynamic equilibrium equation of nanoplates is obtained by incorporating the in-plane thermal and transverse intermolecular distributed loads. The solution of the obtained nonlinear governing equation is done using the Galerkin method and the dynamic pull-in instability voltage of the nanoplates is compared with the available experimental results. Finally, the simultaneous effects of thermal force as well as nonlocal parameter on the dynamic response of nanoplates are examined in the presence of Casimir force in detail.