Free Transverse Vibration of Nickel Coated Carbon Nanotubes

Abstract

Transverse vibration of nickel coated carbon nanotubes is investigated by using molecular dynamics simulations. The simulations are carried out for armchair and zig-zag carbon nanotubes with various lengths. Uncoated and nickel coated carbon nanotubes having same lengths are analyzed and their vibrational behaviors are compared. Free transverse vibrations of nickel coated carbon nanotubes are modelled by using a two-phase local–nonlocal Euler–Bernoulli beam model and solved by finite element method. Nonlocal parameter of the beam model is calibrated based on molecular dynamics simulation results. It is seen that for the same length diameter ratio, the nickel coated carbon nanotubes have similar vibrational characteristics with the uncoated carbon nanotubes but their natural frequencies are smaller than the uncoated ones. Also, it is shown that by using proper nonlocal parameters for each radius length ratio, the two-phase local–nonlocal Euler–Bernoulli beam model can successfully predict the natural frequencies of both short and long nanotubes. Besides natural frequencies and mode shapes, the clustering of nickel atoms depend on simulation temperature which is discussed during oscillation of nickel coated carbon nanotubes.

Topology optimization of scale-dependent non-local plates

“…All these forms with their enhanced versions are widely employed to model size-dependent behaviour of, especially nano and micro, structures with prominent neighbour relations (e.g. carbon nanotubes, graphene sheets, atomic chains/ arrays) (Polizzotto 2001;Ansari et al 2011;Rafii-Tabar et al 2016;Tuna and Kirca 2021;Tuna et al 2019;Eroglu 2020;Pisano et al 2021;Danesh et al 2021;Naderi et al 2021;Günay 2021). Nevertheless, their limitations must be acknowledged to avoid the improper practice leading to paradoxical results which are comprehensively reported in a current review article by Ceballes et al (2021).…”