FIELD: test.
SUBSTANCE: invention relates to test equipment, in particular to samples for evaluation of strength of materials at complex stress-strain state (SSS), characterized by biaxial tension or compression. Disk sample is made in form of plate, which is part of circular disc formed by its truncation by two planes, symmetrical relative to geometrical centre of disc and perpendicular to its middle surface, having support surface limited by external contour, a loading surface, as well as a groove located on one of said surfaces, formed by movement of U- or V-shaped section of the groove along its guide line.
EFFECT: technical result is expansion of possibility of obtaining biaxial type of SSS occurring in working zone of disk sample due to change of its geometrical parameters.
1 cl, 5 dwg
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