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## Pull-in behaviors of micro-beam made of bidirectional functionally grade materials based on modified couple stress theory | ||

Journal of Computational Applied Mechanics | ||

دوره 51، شماره 2، اسفند 2020، صفحه 472-481 اصل مقاله (1.28 MB) | ||

نوع مقاله: Research Paper | ||

شناسه دیجیتال (DOI): 10.22059/jcamech.2020.313559.570 | ||

نویسندگان | ||

Esmail Zarezadeh ^{} ^{1}؛ Ali Shirpay^{2}
| ||

^{1}Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran | ||

^{2}Department of physics, center of basic science khatam ol-anbia (PBU) university, Tehran, Iran | ||

چکیده | ||

In this paper, pull-in behavior of cantilever micro/nano beams made of bi directional functionally graded materials (BDFGM) with small scale effects under electrostatic force is investigated. Couple stress theory is employed to study the influence of small-scale on pull-in behavior. The material properties except Poisson’s ratio obey the arbitrary function in the thickness and length direction. The approximate analytical solutions for the pull-in voltage and pull-in displacement of the microbeams are derived using the Galerkin method. Comparison between the results of present work with other article for pull-in behavior of a microbeams made of isotropic material reveals the accuracy of this study. Numerical results explored the effects of material length scale parameter, inhomogeneity constant, gap distance and dimensionless thickness. | ||

کلیدواژهها | ||

pull-in؛ couple stress؛ Bi directional functionally graded materials؛ size effect؛ Galerkin | ||

مراجع | ||

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