ИСТИНА

Work is devoted to the experimental study of the behavior of structural steels on the postcritical deformation stage at different types of the stress-strain state. Postcritical deformation stage of materials connected with the structural failure and fracturing processes and reflected on the strain curve as a descending section. Experimental and theoretical investigation of the postcritical deformation stage is very important for different materials, especially for heterogeneous materials, and necessary for forecasting of the behavior materials in emergency cases and failure processes propagation. Realization of the postcritical deformation stage allows to use the reserves of load-carrying ability, increase vitality and safety of the deformable systems. Results of uniaxial tension, proportional tension with torsion and complex tension-torsion loading is carried out.