Molecular dynamics investigation into the oscillatory behavior of double-walled boron-nitride nanotubes

• Molecular dynamics study of oscillatory behavior of BNNTs.
• Exploring effects of friction, flexibility, velocity and outer length-to-inner length ratio.
• Flexibility is shown to increase the frequency during the simulation.
• An increase in the initial velocity results in the frequency reduction.
• Rocking motion phenomenon is observed for length ratio bigger than unity.

In this paper, the oscillatory behavior of double-walled boron-nitride nanotubes is investigated based on the molecular dynamics (MD) simulations. The MD simulations are performed using the Lennard-Jones and Tersoff-like potential functions. The influences of friction between the walls of inner and outer tubes, flexibility, velocity and outer length-to-inner length ratio on the frequency of oscillations are studied. The results show that the flexibility increases the frequency during the simulation. Furthermore, it is observed that by increasing the initial velocity, the frequency decreases.