Synopsis of development of wagon materials fatigue failure.

The basic part of the rolling stock consists of the freight wagons. However, they are used under heavy conditions (large-tonnage loads, severe atmospheric conditions, aggressive effect of loads, etc.). The load bearing capacity of the wagons should be provided throughout their service life. The main factors affecting the load bearing capacity of wagons are the properties of the corresponding materials and the cross sections shape of the parts. Therefore, the study of fatigue failure of the wagon materials is an important and relevant topic. The paper presents the features and results of the investigated synopsis of the development of the wagon materials fatigue failures. Thus, the work presents: the factors affecting fatigue limit of wagon parts; the impact of the external factors on the wagon parts strength; the influence of stress concentration; the influence of the absolute dimensions of the part cross-section; the effect of part deformation type and the cycle asymmetry; the effect of temperature; the dependence of strength on time; the influence of the service life of the part and the load condition. [ABSTRACT FROM AUTHOR]