Abstract

The problem of determining the stress-strain state of the rod with non-circular cross-section in torsion considering creep was solved. The solution is based on the hypothesis of Saint-Venant used in the theory of elastic torsion of rods. In contrast to the elastic problem, warping function in creep is not a harmonic function. The problem has reduced to the Poisson differential equation for the stress function. The solution is made numerically by using the finite difference method. An example of the calculation for the polymeric rod from recycled PVC is given. It was found that the shear stresses during creep virtually unchanged, and the relative twist angle increased by 14%.

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