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Nonlinear stability and vibration of imperfect CNTs by Doublet mechanics
Faculty
Engineering
Year:
2020
Type of Publication:
ZU Hosted
Pages:
Authors:
Nazira Mohamed Mansour Mosa
Staff Zu Site
Abstract In Staff Site
Journal:
Applied Mathematics and Computation Elsevier
Volume:
Keywords :
Nonlinear stability , vibration , imperfect CNTs , Doublet
Abstract:
This manuscript exploited a bottom to up modelling nano-mechanics theory to investigate the nonlinear stability and dynamic behaviors of perfect and imperfect carbon nanotubes (CNTs) in pre-buckling and post-buckling domains, for the first time. The Doublet Mechanics (DM) theory is exploited to induce the length scale of CNTs, micro-strain, and micro-stress effects, which are negligible in classical continuum theory. The Euler-Bernoulli kinematic and nonlinear mid-plane stretching effect are considered through analysis. The imperfection of CNTs is described by a harmonic function through spatial direction. The nonclassical sixth order nonlinear integro-partial-differential equation of CNTs is derived in detail. Based on the static equilibrium equation, analytical solutions for smallest buckling loads, as well as, nonlinear static response of perfect and imperfect CNTs in pre-buckling and post-buckling regimes are deduced. The equation of motion of linear vibration problem is solved analytically to get natural frequencies and corresponding mode shapes. Numerical studies investigate the impact of length scale parameter, imperfection amplitude and shear foundation constant on static and dynamic stabilities of CNTs with both fully clamped and simply supported conditions. The current model is effective in designing of NEMS, nano-sensor and nano-actuator manufactured by CNTs.
Author Related Publications
Nazira Mohamed Mansour Mosa, "Exponential higher-order compact scheme for 3D steady convection–diffusion problem", sciencedirect, 2014
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Nazira Mohamed Mansour Mosa, "EXPONENTIAL HIGHER-ORDER COMPACT SCHEME FOR STEADY INCOMPRESSIBLE NAVIER-STOKES EQUATIONS: STREAMFUNCTION-VORTICITY FORMULATION", conferrnce, 2013
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Nazira Mohamed Mansour Mosa, "Numerical analysis of nonlinear free and forced vibrations of buckled curved beams resting on nonlinear elastic foundations", Elsevier, 2018
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Nazira Mohamed Mansour Mosa, "Numerical analysis of nonlinear free and forced vibrations of buckled curved beams resting on nonlinear elastic foundations", international journal of nonlinear mechanics, 2018
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Nazira Mohamed Mansour Mosa, "Periodic and nonperiodic modes of postbuckling and nonlinear vibration of beams attached to nonlinear foundations", Elsevier, 2019
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Department Related Publications
Adel Fathy Meselhy Ibrahiem, "Effect of some manufacturing parameters on mechanical properties of extruded Al-alumina composites", لايوجد, 1900
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Ashraf Abdelfattah Ali Hassanein, "A novel 3-D graphite structure from thermally stabilized electrospun MWCNTs/PAN nanofibril composite fabrics", International Journal of Advanced Manufacturing Technology, 2014
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Amal Elhosaieny Meselhy Alshorbagy, "Free vibration characteristics of a functionally graded beam by finite element method", www.elsevier.com/locate/apm, 2010
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Mohammed Abdelmoniem Mohamed Eltaher , "Static and buckling analysis of functionally graded Timoshenko nanobeams", www.elsevier.com, 2014
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Tamer Ali Abdella Sebaee, "AN EXPERIMENTAL STUDY ON THE BOLTED JOINT CONNECTIONS IN GFRE [0/90]2S LAMINATES", Minoufiya University, 2009
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