Investigation of the Free Longitudinal Vibration of Single-Walled Coiled Carbon Nanotubes (SWCCNTs) using Molecular Dynamics Simulation

In this paper, the free longitudinal vibration of single-walled coiled carbon nanotubes (SWCCNTs) with various boundary conditions (BCs) is investigated via Molecular Dynamics (MD) simulation method. Subsequently the detection of carbon nanotubes, their uses advantage to a wide range of engineering, biophysics and materials areas, because of their great mechanical and electrical properties. Heretofore vibration behavior of the single-walled coiled carbon nanotubes had not been studied with this technique, so using this method, longitudinal fundamental frequencies of single-walled coiled carbon nanotubes has been obtained by applying Reactive Empirical Bond Order (REBO) potential without considering thermal effects. In order to parametric study, the influence of the coiled carbon nanotubes diameter, number of pitch and boundary conditions on the fundamental frequencies is evaluated. The results indicated that increasing the tubes diameter and number of pitch (or length of single-walled coiled carbon nanotubes) lead to reducing the fundamental frequencies. Furthermore, the clamped–clamped single-walled coiled carbon nanotubes’s fundamental frequency is always higher than cantilevered one. The results of this study can be used in vibration analysis of the Nano sensor and Nano actuator with coiled carbon nanotubes elements.