Nonlinear Vibration of Double-Walled Carbon Nanotubes Subjected to Mechanical Impact and Embedded on Winkler–Pasternak Foundation

Abstract

This study was devoted to an investigation on the dynamics of double-walled carbon nanotubes (DWCNTs) under the influence of Winkler–Pasternak foundation near the primary resonance. Two Euler–Bernoulli beams embedded on nonlinear foundation, interacting through van der Waals forces, subjected to mechanical impact are considered. By means of Hamilton’s principle, Eringen’s nonlocal elastic theory, and taking into account the moving nanoparticles, the Galerkin–Bubnov method is applied and accordingly, governing partial differential equations are reduced to two differential equations with variable coefficients. The nonlinear damped and forced vibration is studied using the optimal auxiliary functions method (OAFM). An explicit and very accurate analytical solution is obtained by means of OAFM without considering simplifying hypotheses. An accurate analysis is for the first time reported considering the cumulated effects of nonlinearities simultaneously induced by the Winkler–Pasternak foundation, the curvature of beams and van der Waals force, and also the effect of discontinuities marked by the presence of the Dirac function. Finally, a stability analysis of the considered model is developed by means of the homotopy perturbation method (HPM) using the condition of existence of the two frequencies. It was shown that an increasing of some constitutive parameters substantially reduces the area of stability, all these being of much help in guiding the design of advanced nanoelectromechanical devices, in which nanotubes act as basic elements.

Longitudinal–Transverse Vibration of a Functionally Graded Nanobeam Subjected to Mechanical Impact and Electromagnetic Actuation

“…As we mentioned in [41][42][43][44][45], the expression from the right side of Equation ( 55) is not unique. Also, we can choose any of the following forms of the equation for the first approximation:…”

“…In this section, we will remark on how we found approximate analytical solutions to Equations ( 42) and ( 43) using the OAFM [41][42][43][44][45]. With the help of the following transformation:…”

Characteristics and Applicability Analysis of Nanomorphological Structures for Chemosensors: A Systematic Review

“…An accurate analysis was first reported, taking into account the cumulative effect of the nonlinearity induced simultaneously by the curvature of the beam, the van der Waals forces, the Winkler-Pasternak foundation, and the effects of the discontinuities that were indicated by the presence of Dirac functions. Increasing certain configuration parameters significantly reduces the stability area, all of which have been shown to be of great help in guiding the design of advanced nanoelectromechanical devices where nanotubes act as the primary element [99].…”