Agarkov O. The forecasting of the railway track rails service-life that is based on the criterion of the internal fatigue crack occurence in the rail head

The object is the serive-life of railway rails, the purpose is the development of the method for the assessment of service-life of railway rails based on a mathematical model of the forecasting of contact-fatigue origin cracks in the rail head; to determine the stress-strain state of the rails numerical methods of solid mechanic had been used in the work. During the experimental explanation of the model of elastic-plastic material deformation numerical methods of mathematical analysis had been used. To predict the service-life of rails the kinetic theory of damage accumulation had been used, the novelty is that a new method for prediction the service-life of railway rails by formation of internal cracks in the rail head is developed, the model of deformation of cyclically unstable elastic-plastic material is designed and experimentally justified, the method for calculating the volume of the stress-strain state during the contact with the rail wheels which allows for real mechanical properties of the wheel and rail is established, , and as the results there is a method of assessment of service-life of railway rails based on a mathematical model of forecasting of the contact-fatigue cracks in the rail head origin, the scope of use are the enterprises of railway track facilities, research and educational institutions.