Abstract
1. Regularities of elastoplastic deformation and failure for welded joints in steel 13KhCMF made by manual welding, electroslag, and mechanized welding are governed by the nonuniformity of material static and cyclic properties for individual zones and the external configuration of welds. 2. The effect of nonuniformity in mechanical properties on the supporting capacity of joints in steel 13KhGMF is most marked in the quasistatic failure region. The resistance of a welded joint to low-cycle fatigue failure is governed to a considerable degree by the level of stress and strain concentration created by reinforcement of a weld made by a given technology. 3. Calculation of the supporting capacity of welded joints for steels of increased strength in the low endurance region may be carried out in nominal stresses using a deformation criterion for strength in the zone of structural stress and strain concentration.
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