Mechanical Behaviors of Carbon Nanotubes

(4.86)

where $r_I$ is the radius of a basic circular support. The radius $r_I$ is determined by searching for sufficient adjacent nodes to satisfy the basis. For example, we can designate the support to cover just the three nearest neighboring nodes.

The size of a rectangular support can be defined by

$\{\begin{array}{c}{a}_{1I}=D_{\max }{c}_{1I}\\ a_{2I}=D_{\max }{c}_{2I}\end{array},I=1,\dots ,n,$ (4.87)

(4.87)