employee
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
BBK 392 Железнодорожный транспорт
The issues of the influence of stress concentrators in load-bearing structures of railway rolling stock on their fatigue life and survivability are considered. It is found out that not only welded joints act as stress concentrators, but also structural zones that have been damaged in operation, have internal defects or have been subjected to thermal or mechanical treatment with breakdowns in process. It is advisable to consider the limiting energy density of deformation as a rational criterion for material damage, taking into account elastic-plastic deformation of the material in the stress concentration zone. The analysis of the damage to load-bearing structures shows that the concentration of fatigue damage is fixed in the near-weld zones of joints. Based on the conducted analysis of the damage to the load-bearing structures of the rolling stock, there is a need found to exclude stress concentration zones and ensure continuous monitoring and timely troubleshooting.
stress-strain state (SSS), density, energy, deformation, joints, microcracks, damages
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