А carbon nanotube of the "zigzag" approximation to the valence-force field and the field of central forces-in different schemes of loading is considered (longitudinal tension-comprexsion, uniform presstire-to the side wall and bending the circular ring with two concentrated forces acting along the diameter). The geometry is calculated and digitization with the elements of elastic segment and elastic corner is made. Numerical exper iments to determine the Young's modulus and Poisson's ratio as a function of the geometric parameters were carried out.