Buckling analysis of bonded double walled boron nitride nanotube Based on nonlocal Timoshenko beam theory

چکیده مقاله

In this article, buckling of two double walled boron nitride nanotubes (BDWBNNT) under combined loadings of electro-thermo-mechanic has been investigated as Fig. 1. The two BDWBNNTs are assumed to be bonded by an enclosing elastic medium. DWBNNTS have been simulated by Timoshenko beam model [1] where the piezoelectricity is inherent properties of Boron-Nitride nanotube. Nonlocal elasticity [2-3], Pasternak modulus parameter [4], the effects of temperature change, van der Waals forces between the inner and outer nanotubes and aspect ratio are utilized for modeling the BDWBNNTs. It is assumed that the displacement of BDWBNNT is in the one plane for in-phase buckling state that the nanotube are buckled in the same direction (synchronous) and in out-of-phase sequence of buckling the nanotube is buckled in opposite direction (asynchronous). The small-scale parameter has influence on the instability (or buckling) of BDWBNNTs.