Abstract
The results of the experimentally and theoretically studying the fatigue life of the 08Х18Н10Т austenitic steel under regular and block cyclic modes of low-cycle loading are presented. In the frame of damaged medium mechanics, processes of fatigue damage accumulation for low-cycle fatigue are modeled. The presented model of the methodology for evaluating fatigue life of structural steels has been verified by comparing the results of numerically modeling deformation and failure processes in laboratory specimens with experimental data. The comparison of computational and experimental data makes it possible to corroborate the adequacy of the determining relations of damaged medium mechanics and the methodology for determining material parameters under the effect of the low-cycle fatigue mechanism. A number of characteristic features accompanying the fatigue failure process under block modes of low-cycle loading are noted. Keywords: stressed-strained state, plasticity, fatigue, failure, damage accumulation, number of cycles to failure, fatigue life, resource.
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