Analytical Modelling of Crack Formation Potential in Thermomechanical Processing of Materials

Thermomechanical processes that accompany the processing of products made of structurally inhomogeneous materials are considered. The presence of stress concentrators in the surface layer of processed products in various types of heterogeneities of hereditary origin introduced in obtaining the workpiece and subsequent mechanical processing types are the leading indicators of working surfaces’ bearing capacity. The lack of research on the influence of inhomogeneities formed in the surface layer of products during mechanical processing on their functional properties and, in particular, on the bearing capacity or wear resistance, their optimization determines the relevance of constructing a mathematical model of defect formation in the physical and technical processing of structural elements using optimal criteria of fracture mechanics. A numerical and analytical model is developed to determine the thermomechanical state of structurally inhomogeneous materials containing inhomogeneities such as interfacial cracks and inclusions during mechanical processing. Based on this model, the crack resistance criterion's functional relationships with the technological control parameters are determined to ensure products' processed surfaces' quality characteristics.