سال انتشار: ۱۳۹۱

محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک

تعداد صفحات: ۴

نویسنده(ها):

Ali Lashkari Zadeh – Master of science, Department of Mechanical Engineering, Shahrood University of Technology
Mahmoud Shariati – Associate professor, Department of Mechanical Engineering, Shahrood University of Technology
Javad Lashkari Zadeh – Master of science, Department of Civil Engineering, Ferdowsi University of Mashhad

چکیده:

In this paper, to evaluate the torsional buckling behavior of nanotubes, the effects of van der Waals forces are modeled using a newly proposed nonlinear spring element. This method, designated as structural mechanics approach, is thus proved to be an efficient means to simulate the mechanical behaviors of carbon nanotubes. Due to the application of carbon nanotubes in different fields such as NEMS, where they are subjected to different loading, an investigation of buckling behavior of nanotube is necessary. This model is a combination of other structural model and isdesigned to eliminate the deficiencies inherent in each of the individual approaches.A structural mechanics model is employed for the investigation of the buckling behavior of CNT bundles of three SWCNTs in the CAE space of ABAQUS. To evaluate the buckling loads of carbon nanotube bundles, the effects of Van-der Waals forces are further modeled using a nonlinear spring element. The structural mechanics simulations reveal that CNT bundles comprising longer SWCNTs will exhibit lower critical buckling torque