Elastic waves propagation in stressed SWCNT

摘要

This paper presents the study on the behaviour of deformed singe wall carbon nanotubes associated to the conditions of mechanical treatments. We investigate the time evolution of the deformation wave, propagating along the carbon nanotube, and reflected at both clamped ends by using large atomistic models based on molecular dynamics calculation. The system is turned into a non-homogeneous one by the quick deformation applied at one extremity, determining local changes of elastic properties. Processes concerning mechanic wave propagation and elastic energy accumulation at specific moments and places, culminating with the tube fracture are analysed in relation with the stress-strain characteristic of the single wall carbon nanotube.