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Developing an Equivalent Shell Model Based on Classical and Nonlocal Theory for Vibration Analysis of Carbon Nanoscrolls
, Ph.D. Dissertation Sharif University of Technology ; Ahmadian, Mohammad Taghi (Supervisor) ; Asghari, Mohsen (Supervisor)
Abstract
Carbon nanoscroll (CNS) is a graphene sheet rolled into a spiral structure. The Equilibrium structure of a CNS depends on the elastic bending energy and van der Waals interactions between layers. In recent decade, research on CNSs received high attention after discovering new techniques to produce high purity CNSs. Modal analysis of the CNS is essential in various applications like sensors and actuators. Therefore, in this research, a shell model for free vibration analysis of the CNS is proposed. After considering CNS as an equivalent shell, the assumed mode technique is used to extract natural frequencies and mode shapes of CNSs in different boundary conditions. The effect of geometric...
Vibrational Analysis of Carbon Nanoscroll tubes
, M.Sc. Thesis Sharif University of Technology ; Ahmadian, Mohammad Taghi (Supervisor) ; Assempour, Ahmad (Supervisor)
Abstract
In recent year carbon nanostructures (CNS) has been the pinnacle of academic and industrial research. After development and refinement of better methods of controlled fabrication of high-quality CNS, these structures started substituting nanotubes in their renowned applications including nanochannels and nanocarriers. Due to the tunable core size of CNS using electric fields, they can be used as controlled ion channels and nanocarriers with controlled drug release as well as more dynamics oriented applications including nano-oscillators, nano-actuators and artificial muscle tissue. However lack of vibrational studies on CNS has hindered researchers in this path. In this thesis vibrational...
A shell model for free vibration analysis of carbon nanoscroll
, Article Materials ; Volume 10, Issue 4 , 2017 ; 19961944 (ISSN) ; Ahmadian, M. T ; Asghari, M ; Pugno, N. M ; Sharif University of Technology
Abstract
Carbon nanoscroll (CNS) is a graphene sheet rolled into a spiral structure with great potential for different applications in nanotechnology. In this paper, an equivalent open shell model is presented to study the vibration behavior of a CNS with arbitrary boundary conditions. The equivalent parameters used for modeling the carbon nanotubes are implemented to simulate the CNS. The interactions between the layers of CNS due to van der Waals forces are included in the model. The uniformly distributed translational and torsional springs along the boundaries are considered to achieve a unified solution for different boundary conditions. To study the vibration characteristics of CNS, total energy...