On the dynamic instability of nanowire-fabricated electromechanical actuators in the Casimir regime: Coupled effects of surface energy and size dependency

Keivani, Maryam. and Mardaneh, MohammadReza. and Koochi, Ali. and Rezaei, Morteza. and Abadyan, Mohamadreza. (2016) On the dynamic instability of nanowire-fabricated electromechanical actuators in the Casimir regime: Coupled effects of surface energy and size dependency. Physica E: Low-Dimensional Systems and Nanostructures, 76. pp. 60-69.

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Abstract

Herein, the dynamic pull-in instability of cantilever nanoactuator fabricated from conductive cylindrical nanowire with circular cross-section is studied under the presence of Casimir force. The Gurtin-Murdoch surface elasticity in combination with the couple stress theory is employed to incorporate the coupled effects of surface energy and size phenomenon. Using Green-Lagrange strain, the higher order surface stress components are incorporated in the governing equation. The Dirichlet mode is considered and an asymptotic solution, based on the path integral approach, is applied to consider the effect of the Casimir attraction. Furthermore, the influence of structural damping is considered in the model. The nonlinear governing equation is solved using analytical reduced order method (ROM). The effects of various parameters on the dynamic pull-in parameters, phase planes and stability threshold of the actuator are demonstrated. © 2015 Elsevier B.V.

Item Type: Article
Additional Information: cited By 4
Uncontrolled Keywords: Couple stress theory, Cylindrical nanowire, Dynamic pull-in instability, Surface effect
Subjects: QT physiology
Divisions: Reserach Vice-Chancellar Department
Depositing User: zahra bagheri .
Date Deposited: 08 Jul 2017 05:37
Last Modified: 17 Feb 2018 07:23
URI: http://eprints.skums.ac.ir/id/eprint/831

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