Modern Approach to Determine the Stress State in the Deformation Zone under Local Loading

Determining the stress state in the deformation zone under surface plastic deformation is an important issue to consider when implementing the technological process. It has a direct impact on the technological quality and the operational characteristics of the machine parts and products in general. The mathematical model of local hardening is built based on the small elastic-plastic deformation theory and the finite element method using ANSYS software. The model can be used for determining the stress state in the deformation zone and residual stresses in the hardened part. The influence of various factors on the stress state is considered such as the ball diameter, depth of penetration, material of the sample and diameter of the cylindrical sample. The results obtained have shown that the application of the finite element method for the analysis of the technological processes of hardening allows better understanding of the stress formation processes happening when the workpiece is deformed.

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