  The nonlinear mechanical response of carbon nanotubes, referred to as their
"buckling" behavior, is a major topic in the nanotube research community.
Buckling means a deformation process in which a large strain beyond a threshold
causes an abrupt change in the strain energy vs. deformation profile. Thus far,
much effort has been devoted to analysis of the buckling of nanotubes under
various loading conditions: compression, bending, torsion, and their certain
combinations. Such extensive studies have been motivated by (i) the structural
resilience of nanotubes against buckling and (ii) the substantial influence of
buckling on their physical properties. In this contribution, I review the
dramatic progress in nanotube buckling research during the past few years.
