Investigation of the surface roughness effect on the nonlinear size-dependent pull-in instability of the beam-type nano-actuator

被引:3
作者
Vanani, S. M. Fatemi [1 ]
Beni, Y. Tadi [2 ,3 ]
机构
[1] Islamic Azad Univ, Shahrekord Branch, Young Researchers & Elite Club, Shahrekord, Iran
[2] Shahrekourd Univ, Fac Engn, Shahrekourd, Iran
[3] Shahrekord Univ, Nanotechnol Res Ctr, Shahrekord 8818634141, Iran
关键词
Nano-actuator; Size-dependent pull-in instability; Surface roughness; Van der Waals force; DQM; 85; 85+j; 46; 32; +x; 70; -P; 77; 65; -J; DER-WAALS FORCE; STRAIN GRADIENT ELASTICITY; FREE-VIBRATION ANALYSIS; BOUNDARY-CONDITIONS; CASIMIR FORCE; DIFFERENTIAL QUADRATURE; BEHAVIOR; VOLTAGE; NEMS; STABILITY;
D O I
10.1007/s12648-020-01693-8
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, the effect of surface roughness on the pull-in behavior of beam-type nano-actuator in the presence of intermolecular Van der Waals force has been investigated. In order to model the surface roughness, the roughness has been modeled as a step on the fixed electrode. Based on the modified couple stress theory and by using Hamilton's principle, the governing equation and boundary conditions have been derived for the Euler-Bernoulli beam model. The differential quadrature method has been used to solve the nonlinear governing equations of the system. The results showed that the presence of roughness on the fixed electrode leads to an increase in the displacement of the beam and a reduction in the pull-in voltage, especially when the roughness is at the end of the beam and has considerable height. In this case, the freestanding behavior of the nano-actuator and the effect of roughness on the critical intermolecular force in the absence of electrostatic force are also evaluated. The results revealed a decrease in the critical intermolecular force due to the presence of roughness. However, increasing the material length scale parameters leads to an increase in the pull-in voltage and the freestanding values. Also, the size effect parameter decreases the displacement at the end of the beam.
引用
收藏
页码:253 / 265
页数:13
相关论文
共 41 条
[1]   Investigation of the surface roughness effect on the nonlinear size-dependent pull-in instability of the beam-type nano-actuator [J].
Seyyed Mohammad Fatemi Vanani ;
Yaghoub Tadi Beni .
Indian Journal of Physics, 2021, 95 :253-265
[2]   Size-dependent pull-in instability of torsional nano-actuator [J].
Beni, Y. Tadi ;
Abadyan, M. .
PHYSICA SCRIPTA, 2013, 88 (05)
[3]   Investigation of Size Effect on the Pull-in Instability of Beam-type NEMS under van der Waals Attraction [J].
Beni, Y. Tadi ;
Abadyan, M. R. ;
Noghrehabadi, Aminreza .
11TH INTERNATIONAL CONFERENCE ON THE MECHANICAL BEHAVIOR OF MATERIALS (ICM11), 2011, 10 :1718-1723
[4]   Nonlinear pull-in instability of carbon nanotubes reinforced nano-actuator with thermally corrected Casimir force and surface effect [J].
Yang, W. D. ;
Wang, X. .
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2016, 107 :34-42
[5]   Effect of flexoelectricity on the Pull-in instability of beam-type NEMS [J].
Dehkordi, Mostafa Farajzadeh ;
Beni, Yaghoub Tadi ;
Dashtaki, P. Mohammadi ;
Vanani, S. M. Fatemi .
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2023, 155 :87-107
[6]   Size-dependent nonlinear pull-in instability of a bi-directional functionally graded microbeam [J].
Vesal, Rahim ;
Amiri, Ahad .
STEEL AND COMPOSITE STRUCTURES, 2024, 52 (05) :501-513
[7]   Modeling the size dependent pull-in instability of beam-type NEMS using strain gradient theory [J].
Koochi, Ali ;
Sedighi, Hamid M. ;
Abadyan, Mohamadreza .
LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES, 2014, 11 (10) :1806-1829
[8]   Modeling the effect of intermolecular force on the size-dependent pull-in behavior of beam-type NEMS using modified couple stress theory [J].
Beni, Yaghoub Tadi ;
Karimipoeur, Iman ;
Abadyan, Mohamadreza .
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, 2014, 28 (09) :3749-3757
[9]   USING ALE-FEM TO SIMULATE THE INSTABILITY OF BEAM-TYPE NANO-ACTUATOR IN THE PRESENCE OF ELECTROSTATIC FIELD AND DISPERSION FORCES [J].
Beni, Y. Tadi ;
Vahdati, A. R. ;
Abadyan, M. .
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING, 2013, 37 (M1) :1-9
[10]   Nonlinear size-dependent pull-in instability and stress analysis of thin plate actuator based on enhanced continuum theories including nonlinear effects and surface energy [J].
Karimipour, Iman ;
Beni, Yaghoub Tadi ;
Zeighampour, Hamid .
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, 2018, 24 (04) :1811-1839