FIELD: nondestructive strength testing.
SUBSTANCE: method comprises loading the articles and determining strain and stress in the section of maximum stress. The turns of the string of an instrument for measuring perimeter is wound on the article so that the intermediate turn is in the section of maximum strength and the other turns are arranged symmetrically with respect to the intermediate turn. The integral strain in the section is determined, this value is used for determining the effective modulus of longitudinal elasticity of the article material, and the value of strength is calculated from the equation presented. The article is additionally loaded in the elastic-plastic region in intervals multiple to the destructive effective stress. The value of plastic strain is fixed at each stage.
EFFECT: enhanced reliability.
5 dwg
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