couple stress theory
Bending and vibration analysis of delaminated Bernoulli–Euler micro-beams using the modified couple stress theory
... beam theory are less than half of those predicted by the modied couple stress ...classical theory are not accurate enough for the present system, since the role of length-scale parameter is ...
14
Size Effect on Free Transverse Vibration of Cracked Nano-beams using Couple Stress Theory
... from either ab initio studies or molecular dynamics calculations in the classic theory [11]. However, considering size-dependency mechanical properties in nanoscale of structure or length scale parameters they ...
9
Free Vibration Analysis of Nonuniform Microbeams Based on Modified Couple Stress Theory: an Analytical Solution
... Utilizing variable cross section beside the significant behavior of mirco scale structures could lead to a more reliable design. There have been some great studies in order to model the vibration in nonuniform ...
10
Free vibration analysis of multi-cracked micro beams based on Modified Couple Stress Theory
... 206 electromechanical systems (MEMS) such as microswitches. [1, 2]There are several studies on microbeams using the size-dependent theories. Kong et al.[3] showed the size effect of microbeam in the natural frequency of ...
18
Free vibration analysis of functionally graded stiffened micro-cylinder based on the modified couple stress theory
... the couple stress elasticity theory [11-13]. In this theory, some higher-order material length scale parameters appear, in addition to the two classical Lame ...modied couple ...
18
A Size-dependent Bernoulli-Euler Beam Formulation based on a New Model of Couple Stress Theory
... of couple stress theory presented by Hadjesfandiari and ...classical couple stress ...present couple stress model are higher than those predicted by the classical ...
10
Study of Volumetric Flow Rate of a Micropump Using a Non-classical Elasticity Theory
... classical theory of elasticity does not touch the accurate and definite characterizations of deformation occurrence due to not including the size ...classical theory (CT) make them impossible to predict ...
11
Finite Element Model and Size Dependent Stability Analysis of Boron Nitride and Silicon Carbide Nanowires/Nanotubes
... beam theory (CT), Nonlocal Elasticity Theory (NET), Surface Elas- ticity Theory (SET), Modied Couple Stress Theory (MCST), Modied Strain Gradient Theory (MSGT), nite ...
21
Effect of MHD on Pivoted Curved Slider Bearing Lubricated with Non-Newtonian Fluid
... with couple stress fluid. Based on the Stokes couple stress theory, the modified Reynolds equation is derived which governs the fluid pressure in the flow ...and couple ...
16
Chaotic convection in couple stress liquid saturated porous layer
... proposed couple stress theory in the sim- plest polar fluid ...fluids, couple stress fluids have differ- ent features such as polar effects, having large ...
10
Electro osmotic flow of couple stress fluids in a microchannel propagated by peristalsis
... of couple stresses is to introduce a length-dependent effect, which is absent in the classical nonpolar fluid dynamics (Navier-Stokes) ...the couple stress model is that although it introduces extra ...
28
An assessment of couple stress theories
... primary couple stress theories: original Mindlin-Tiersten-Koiter couple stress theory (MTK-CST), modified couple stress theory (M-CST) and consistent couple ...
30
Couple Stress Effect on Micro/Nanocantilever-based Capacitive Gas Sensor
... In this paper, the behavior of a micro/nano-beam under electrostatic actuation is modeled by considering the couple stress theory and then the sensory behavior of the micro/nanocantilever due to the ...
10
An explicit solution for the size-dependent large amplitude transverse vibration of thin functionally graded micro-plates
... The structure of this article is organized as fol- lows: Section 2 presents the displacement eld and material properties of FG micro plates. In Section 3, the nonlinear dynamic governing equation of function- ally graded ...
14
Analyzing dynamical snap-through of a size dependent nonlinear micro-resonator via a semi-analytic method
... order theory that takes the size effect into account is the couple-stress theory presented by Koiter [5] and Mindlin and Tiersten ...the couple-stress theory. The modified ...
18
The size-dependent electromechanical instability of double-sided and paddle-type actuators in centrifugal and Casimir force fields
... Abstract. The present research is devoted to theoretical study of the pull-in performance of double-sided and paddle-type NEMS actuators fabricated from cylindrical nanowire operating in the Casimir regime and in the ...
14
Effect of size dependency on in-plane vibration of circular micro-rings
... modied couple stress theory, the size-dependent dynamic behavior of circular rings on elastic foundation is ...modied couple stress are considerably more than those predicted based on ...
13
Strain gradient elasticity with geometric nonlinearities and its computational evaluation
... and γ by torsion. However, the correctness of simplifi- cations based on these assumptions is difficult to test. The third difficulty arises by varying the material param- eters in order to comprehend their roles ...
11
STABILITY ANALYSIS OF THREE LOBE HYDRODYNAMIC JOURNAL BEARING: COUPLE STRESS FLUID EFFECTS
... hydrodynamic theory has failed to model various modern lubricants which have developed as a result of technological advancement and several practical lubrication ...applications. Couple stress fluids ...
10
The effectiveness of stress management training on blood glucose control in patients with type 2 diabetes
... that stress and psychological distress play an important role in the development, intensification, and chronicity of diabe- tes ...[8]. Stress plays a dual role (cause and effect) in its relationship with ...
9