We present coarse-grained simulations of torsion induced rippling deformation morphology of multiwalled carbon nanotubes (MWCNTs). Our simulations reveal that beyond the torsional bifurcation, the rippling pattern propagates from outer to inner layers, with the two innermost layers acting as a hard core that hardly ripples. Despite the highly nonlinear rippling deformation, the mechanical response of MWCNTs follows a simple bilinear law, with a nearly constant ratio (∼60%) of post- to prerippling torsional rigidities. The bifurcation torsion scales inversely with the square of tube radius. This bilinear constitutive relation may be exploited by large-scale simulations of MWCNT-based materials and devices.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)