Avtomaticheskaya Svarka (Automatic Welding), #4, 2019, pp. 7-14
Stress concentration in the butt welded joints with a one-sided reinforcement (Review)
A.V. Moltasov, P.M. Tkach, I.G. Tkach, V.V. Verushkin
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine.
The strength of parts and structural elements in the presence of welds largely depends on the design of their joints and assemblies. A sharp change in the geometric shape in their vicinity causes the appearance of additional local stresses or their concentration. The value of these stresses depends on the structural shape of mating of separate elements. That is why they can affect the strength of welded structures in a different way. Stress concentration of in the zone of transition from the weld to the base metal has a significant effect on the resistance of fatigue welds. At the elastic deformation, as a quantitative level of stress concentration, the theoretical stress concentration factor serves, which does not depend on properties of the material, and at a preset type of deformation its value is influenced only by geometric parameters of the stress concentrator, such as its shape and relative dimensions. In practice, the theoretical stress concentration factor is determined by approximate dependencies, as well as by analytical, experimental and numerical methods for investigation of stressed state. The description and analysis of these methods are the aim of the presented review. 37 Ref., 2 Fig.
butt welded joint, one-sided reinforcement, axial load, stressed state, tension, bending, stress concentration
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