Features of solving technological problems in mechanics of bodies with non-uniform metal structure transformed in thermo-force loading

Solution for the actual problems of mechanics, materials science and related sciences of formation of the metal body in high-technological processes was proposed. The paper is related to using pulsed electro-mechanical treatment (EMT) as an example of analysis of production and related problems of structure formation and mechanical properties of the treated body. The algorithm for solving the thermo-elasto-plasticity problem taking into account changes in the thermo-structural state of metal, dynamic, mechanical effects and surface deformation changes in the space of intensity of stresses, strains and temperature was developed. The necessity of formulating and solving specific problems of material science of structure, based on existing empirical correlations was shown. The procedure of time grid confirming the correct numerical solution of various-related thermal, structural and mechanical processes was offered. The convergence, stability and adequacy of the proposed numerical method for solving the technological problems for EMT of steels were developed. Particular attention is paid to the problem of physical processes connectivity and inertial effects in a dynamically changing thermal, structural and stress-strain fields during EMT. Calculation examples of the structural areas and elasto-plastic stress distribution during EMT of steel bodies simulated by semi-infinite regions with a homogeneous structure and a non-uniform two-layer composition of the sample with hardened surface layer were shown. Comparison of the results has allowed identifying and describing the effects in the stress-strain distribution in inhomogeneous bodies with the transforming structure during EMT.