FIELD: test equipment.
SUBSTANCE: invention relates to the field of mechanical tests of constructional materials and can be used for determination of mechanical characteristics of sheet materials in the conditions of plain strain. The method of testing of constructional material for plasticity consists in that a squared smooth flat sample is loaded until destruction with a replaceable punch with semi-cylindrical shape in a dismountable slot-hole matrix, the minimum bending radius and the thickness of the sample working part near the formed crack are determined on the basis of which the value of limit plasticity of its material is determined.
EFFECT: improvement of accuracy of test by forming on the working part of the sample of the uniform strained state.
1 dwg
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