Study using the method of characteristic creep parameters of orthotropic rods under torsion

The Bhatnagar–Gupta method is used to consider a solution to the problem of torsion of a rod with a circular cross section cut in the longitudinal direction from a transversally isotropic plate under creep conditions is considered. It is shown that the solution agrees satisfactorily with the lower and upper estimates of the twisting angular velocity obtained on the basis of the principles of minimum total power and additional scattering, as well as with the results of numerical simulation in the Ansys finite element program. Based on the Bhatnagar–Gupta solution, the possibility of using the method of characteristic parameters for estimating the stress-strain state and the rate of the twist angle of a rod under the action of a constant moment is shown.