METHOD FOR DETERMINING THE ENDURANCE LIMIT OF THE MATERIAL OF A CYLINDRICAL PART UNDER TORSION Russian patent published in 2022 - IPC G01N3/40 

FIELD: material research.

SUBSTANCE: invention relates to the field of determining the yield strength during torsion without destroying the material of parts operating under torque loading conditions. Essence: the surface of the tested material is loaded by means of an indenter at a 90° crossing angle of the axis of the cylindrical indenter to the axis of the cylindrical part with a load whose value corresponds to the hardness measurement range, measuring the depth of the resulting residual imprint, determining the critical load, and calculating the yield point of the tested material of the cylindrical part under torsion according to the dependence , where F is the load on the cylindrical indenter (H); F_cr is the critical load, (H); h is the depth of the residual imprint, (mm); R_mis is the mismatch radius of curvature in contact; c is the coefficient of plasticity under torsion.

EFFECT: simplification of the method for determining the yield point of the material of a cylindrical part during torsion and increasing its accuracy.

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