Dynamic analysis of carbon nanotubes under electrostatic actuation using modified couple stress theory

2013 ◽  
Vol 225 (6) ◽  
pp. 1523-1535 ◽  
Author(s):  
Mir Masoud Seyyed Fakhrabadi ◽  
Abbas Rastgoo ◽  
Mohammad Taghi Ahmadian ◽  
Mahmoud Mosavi Mashhadi
Keyword(s):  
Carbon Nanotubes ◽  
Dynamic Analysis ◽  
Couple Stress ◽  
Couple Stress Theory ◽  
Modified Couple Stress Theory ◽  
Electrostatic Actuation ◽  
Stress Theory ◽  
Modified Couple Stress

Application of Modified Couple Stress Theory and Homotopy Perturbation Method in Investigation of Electromechanical Behaviors of Carbon Nanotubes

2016 ◽  
Vol 9 (1) ◽  
pp. 23-42 ◽  
Author(s):  
Mir Masoud Seyyed Fakhrabadi
Keyword(s):  
Carbon Nanotubes ◽  
Perturbation Method ◽  
Couple Stress ◽  
Homotopy Perturbation Method ◽  
Couple Stress Theory ◽  
Modified Couple Stress Theory ◽  
Governing Equations ◽  
Stress Theory ◽  
Homotopy Perturbation ◽  
Modified Couple Stress

AbstractThe paper presents the size-dependant behaviors of the carbon nanotubes under electrostatic actuation using the modified couple stress theory and homotopy perturbation method. Due to the less accuracy of the classical elasticity theorems, the modified couple stress theory is applied in order to capture the size-dependant properties of the carbon nanotubes. Both of the static and dynamic behaviors under static DC and step DC voltages are discussed. The effects of various dimensions and boundary conditions on the deflection and pull-in voltages of the carbon nanotubes are to be investigated in detail via application of the homotopy perturbation method to solve the nonlinear governing equations semi-analytically.

scholarly journals Size-dependent characteristics of electrostatically actuated fluid-conveying carbon nanotubes based on modified couple stress theory

2013 ◽  
Vol 4 ◽  
pp. 771-780 ◽  
Author(s):  
Mir Masoud Seyyed Fakhrabadi ◽  
Abbas Rastgoo ◽  
Mohammad Taghi Ahmadian
Keyword(s):  
Carbon Nanotubes ◽  
Couple Stress ◽  
Dynamic Properties ◽  
Couple Stress Theory ◽  
Modified Couple Stress Theory ◽  
Stress Theory ◽  
Electrostatically Actuated ◽  
Size Dependent ◽  
Nanoscale System ◽  
Modified Couple Stress

The paper presents the effects of fluid flow on the static and dynamic properties of carbon nanotubes that convey a viscous fluid. The mathematical model is based on the modified couple stress theory. The effects of various fluid parameters and boundary conditions on the pull-in voltages are investigated in detail. The applicability of the proposed system as nanovalves or nanosensors in nanoscale fluidic systems is elaborated. The results confirm that the nanoscale system studied in this paper can be properly applied for these purposes.

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