FIELD: test equipment.
SUBSTANCE: invention relates to mechanical testing of structural materials and can be used in determining mechanical characteristics of sheet materials under conditions of planar deformation. Essence: smooth planar rectangular specimen is loaded prior to failure by replaceable semi-cylindrical punches in slot-type wedge-type matrix with wall angle of 60°, minimum bending radius and thickness of the working part of sample are set near crack formed, on basis of which magnitude of ultimate plasticity of its material is calculated.
EFFECT: technical result: increasing test accuracy and reducing its labor intensity.
1 cl, 1 dwg
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