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

چکیده مقاله

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 [1] 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 vdw force [2] are considered and for simulation of the interaction between the polymer matrix and external tube using Pasternak model [3]. The numerical results indicate that critical buckling load occurs in the middles modes. Moreover for the Winkler related the Pasternak model the buckling occurs sooner. Also the results show that for the rigid elastic medium for the both of Pasternak and Winkler models the buckling load is independent of their values moreover from the result can be seen that the buckling load increased with the thermal change.