Ural Federal University (Ekaterinburg, Russia):

M. V. Erpalov, Cand. Eng., Associate Prof., Chair “Metal Forming”, m.v.erpalov@urfu.ru
D. A. Pavlov, Cand. Eng., Associate Prof., Chair “Metal Forming”, d.a.pavlov@urfu.ru

A review of existing methods for torsion testing samples has been presented in order to study the rheological properties of various materials, as well as approaches to the processing of experimental data obtained in the course of testing in the form of dependence of torque on the sample twist angle. The need to develop the universal and reliable method to determine the resistance to shear deformation of materials sensitive to the strain rate, in particular at high temperatures, has been shown. A new solution has been proposed for the task, which includes testing of cylindrical samples of continuous section for torsion with variable acceleration. It has been shown that the method proposed in the middle of the 20^th century will be valid for determining the resistance to shear deformation of the material under study.
The study has been supported by the program 211 of the Government of the Russian Federation (agreement No. 02.A03.21.0006).

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