Simulation of generation and development of localized plastic deformation in steel specimens with welded joints
In the paper we simulate the generation and development of localized plastic deformation in low-carbon steel specimens with welded joints. Luders band propagation is described using a model based on the two-limit criterion of plastic flow. We study the behavior of 3D welded specimens with the gradient and abrupt change of mechanical properties in the heat-affected zone. The plastic deformation evolution in welded specimens is shown to depend on mechanical characteristics of the heat-affected zone and competitive processes of stress concentration near the testing machine grips and weld - heat affected zone - base metal interfaces.