FIELD: testing.
SUBSTANCE: method for determination of strength of carbon substance relates to physical and mechanical tests of materials having a brittle fracture mode. The method for determination of strength of carbon substance consists in that samples of at least two granulometric fractions of a different size within 0.4-5 mm are selected, each fraction is placed in turn to a container with a volume V, deformed, a value of load σ is fixed for each fraction as a function of relative sample deformation ε. A dependence of the difference of relative deformations for fractions of a different size with the same value of load Δε(σ) is determined, while an extremum point is isolated from the resulting dependencies, and it is considered that a load corresponding to this point is ultimate strength of carbon substance.
EFFECT: increase in the accuracy of determination of strength of carbon substance and reduction in labor intensity of the manufacture of samples.
1 cl, 6 dwg
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