In the article the questions connected with modeling of isotropic material on an
example of carbon steel St3ps  for subsequent use in analysis of power protective frames of
cabins of agricultural machinery in accordance with regulatory requirements are considered
. The choice of the Johnson-Cook (JC) material model for performing tasks of this type is
substantiated. Full-scale tests of steel specimens were carried out, on the basis of which the
mathematical model of material was validated.
Keywords: isotropic material; carbon steel; Johnson-Cook material model.
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