Formulas for calculating at any point the stress state of binding material of rods reinforced with elastic fibres are presented in this paper. The proposed solution method is called "conservation laws of differential equations". It allows one to construct an elastic-plastic boundary in a twisted rod and thereby evaluate its bearing capacity. The obtained relations provide the basis for developing computer programs that allow one to find the elastic-plastic boundary of the rod under study. As an example results of calculations for rods of the "H-beam" type profile are presented for various values of the torque parameter a and parameter λ
Cherepanova et al. (Thu,) studied this question.