Thermal Effect on the Torsional Buckling of Double Walled Carbon Nanotube Embedded in Pasternak Foundation

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 2، دوره 4، شماره 1، آذر 2011، صفحه 11-16   

نوع مقاله: Persian

نویسندگان

Ali Ghorbanpour Arani^{* 1}؛ Mohammad Sharif Zarei²؛ Mehdi Mohammadimehr³

¹Associate Professor, Faculty of Engineering, Kashan University, Kashan

²Ph.D. Student, Faculty of Engineering, Kashan University, Kashan

³Assistant Professor, Faculty of Engineering, Kashan University, Kashan

چکیده

In this study the effect of thermal stress on the torsional buckling of double walled carbon nanotubes is investigated. Moreover based on nonlocal continuum mechanic the buckling governing equations are obtained and equilibrium of Equations is generalized to double wall nanotubes. Also in this study the elastic medium, small scale effect and van der Walls force are considered. Also for simulation of the interaction between the polymer matrix and external tube Pasternak model is used. The numerical results indicate that critical buckling load occurs in the middle modes. Moreover for the Winkler related the Pasternak model the buckling occurs earlier. Results show that for rigid elastic medium in both case of Pasternak and Winkler models the buckling load is independent of their values Moreover from the result it can be seen that the buckling load has been increase as the thermal effect change.

کلیدواژه‌ها

Double walled carbon nanotube؛ Thermal buckling؛ Nonlocal continuum mechanic؛ Elastics medium؛ Pasternak model

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