Effects of Mechanical Strain Applied on an Outer Tube on Oscillatory Behavior of Oscillators Built from Double-walled Carbon Nanotubes

The oscillatory behavior of oscillators built from double-walled carbon nanotubes (DWCNTs) containing an outer tube subject to tensile pre-strain or compressive pre-strain is investigated using the classical molecular dynamics (MD) simulation method. The MD results show that the oscillatory behavior of the DWCNT-based oscillators is closely related to the pre-strain. Whatever the outer tube is subject to tensile pre-strain or compressive pre-strain, with the increase in the pre-strain, the energy dissipation of the oscillators is significantly accelerated, leading to faster amplitude attenuation. It is also found that the pre-strain applied on the outer tube will increase the oscillation frequency of the inner tube.