A 2-DOF microstructure-dependent model for the coupled torsion/bending instability of rotational nanoscanner

Keivani, Maryam. and Abadian, Naeime. and Koochi, A. and Mokhtari, Javad. and Abadyan, Mohamadreza. (2016) A 2-DOF microstructure-dependent model for the coupled torsion/bending instability of rotational nanoscanner. Applied Physics A: Materials Science and Processing, 122 (10).

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Abstract

It has been well established that the physical performance of nanodevices might be affected by the microstructure. Herein, a two-degree-of-freedom model base on the modified couple stress theory is developed to incorporate the impact of microstructure in the torsion/bending coupled instability of rotational nanoscanner. Effect of microstructure dependency on the instability parameters is determined as a function of the microstructure parameter, bending/torsion coupling ratio, van der Waals force parameter and geometrical dimensions. It is found that the bending/torsion coupling substantially affects the stable behavior of the scanners especially those with long rotational beam elements. Impact of microstructure on instability voltage of the nanoscanner depends on coupling ratio and the conquering bending mode over torsion mode. This effect is more highlighted for higher values of coupling ratio. Depending on the geometry and material characteristics, the presented model is able to simulate both hardening behavior (due to microstructure) and softening behavior (due to torsion/bending coupling) of the nanoscanners. © 2016, Springer-Verlag Berlin Heidelberg.

Item Type: Article
Additional Information: cited By 0
Uncontrolled Keywords: Engineering controlled terms, Degrees of freedom (mechanics),Stability,Torsional stress,Van der Waals forces
Subjects: QT physiology
Divisions: Reserach Vice-Chancellar Department > University of Management Conferences and Congresses
Reserach Vice-Chancellar Department > student research center
Depositing User: zahra bagheri .
Date Deposited: 03 Jul 2017 05:44
Last Modified: 17 Feb 2018 06:04
URI: http://eprints.skums.ac.ir/id/eprint/712

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