Calculated Assessment of Crack Development Under Cyclic Loading of the Plate Using the Parameters of Dispersed Damage of the Material

The reliable operation of structures and energy machines is related to ensuring thermal strength and durability of their elements and assemblies. Currently, a difficult situation has developed in the modern energy market; the equipment works in difficult conditions and, as a result, it is operated in variable modes, which causes accelerated wear of the resource. Ensuring the reliable use of power machines and structures of various complexity requires a calculated assessment of the thermal strength and durability of their elements, which is based on the application of new methods and calculation models taking into account a number of important factors, including damage, heterogeneity of material properties, the influence of non-stationary temperature fields and the presence of cracks. This paper is devoted to the development of the methodology for crack growth calculations in plate elements of structures under cyclic loading in an elastic-plastic setting using the concept of the accumulation of dispersed damage in the material. At the top of the crack, the processes of sign-changing elastic-plastic deformation and crack resistance of the material are simulated using data from fatigu