Methodical Features of Tensile Testing of Ring Samples

Experimental and computational studies of the deformation behavior of ring samples under stretching with the use of cylindrical supports have been performed. Methodological errors of this type of testing have been analyzed. The deformation accumulated upon straightening a ring sample and also the gauge length thereof depending on the dimensions of the sample and supports have been determined. Relations that describe the error in determining the gauge length of a ring sample and the plastic deformation accumulated in the course of its straightening have been established.