A discussion of recently developed theoretical basis of the inelastic behav
ior of fullerene nanotubes is presented. Defect formation by a Stone-Wales
bond rotation, its topology, and energy is calculated as a function of nano
tube type, and an analytical equation is derived. Inter-defect interaction
is analyzed due to its importance in the relaxation process. Strength of th
e nanotube-bundle is estimated for a broad range of parameters. (C) 2000 El
sevier Science Ltd. All rights reserved.