FIELD: testing equipment. SUBSTANCE: invention relates to plants testing samples for tensile testing. Power elements are integrated into parallel and series circuits. Relationship y of rigidity of series circuit to rigidity of one branch of parallel circuit is determined by expression t γ 2(i+n) - (g-i)(i+n)J/g-i, where i is number of samples tested simultaneously, g is permissible value of dynamics factor with simultaneous rupture of 1-i samples; n is multiplicity of rigidity of power element for centering of application of load relative to rigidity of one branch of parallel circuit. EFFECT: increased loading accuracy by reduction of rupture of some samples on load on to unruptured samples. 1 dwg
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