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Abstract
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The U-shaped and double-sided nanostructures are promising for developing miniature angular speed
sensors. While the electromechanical instability of conventional beam-type nanostructures has been extensively
addressed in the literature, few researchers have investigated this phenomenon in the double-sided and U-shaped
sensors. In this regard, the present work demonstrates the
effect of the centrifugal force on the pull-in performance
of the double-sided and U-shaped sensors fabricated from
cylindrical nanowire and operated in the van der Waals
(vdW) regime. Based on the modifed couple stress theory,
the size-dependent constitutive equations of the sensors are
derived. The governing equations are solved by two different approaches, i.e. the analytic Duan–Adomian method
and the numerical differential quadrature method. The
in?uences of the vdW and centrifugal forces, geometric parameters and the size phenomenon on the pull-in parameters are demonstrated.
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