This paper presents a simple exact solution for coupled nonlinear free vibration analysis of
Multilayer Graphene Sheets (MLGS) using elliptical functions. Though elliptical functions
are used in nonlinear dynamics, they are employed to find the exact solution of a coupled
system for the first time. The nonlinear dynamic equation including geometric nonlinearity
and Eringen nonlocal theory is uncoupled by elliptical functions, and exact solutions for
simply supported boundary conditions are obtained. The results are compared with the
harmonic balance method. The nonlinear frequency of MLGS is studied for its effects with
a small scale parameter, and the linear and nonlinear van der Waals force.
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