Modeling the shot peening process of machine parts

The paper concerns computer modeling and simulation of the shot peening process of machine parts. An application was developed in the ANSYS/LS-DYNA software for time-domain simulation of physical phenomena occurring in the contact zone between the peening element and the workpiece. The influence of the mutual distance between ball impacts on the state of stress and permanent deformation in the workpiece was investigated.Example results of numerical simulations are presented. An important problem in modern manufacturing techniques is the issue of improving the technological quality of a product while minimizing costs.
Research shows that the surface layer has the greatest impact on the functional quality of a product; if poorly formed, it is the cause of over 80% of part failures, and can also be the cause of increased resistance and thus energy loss of approximately 50%.
Therefore, it is extremely important to use technologies for finishing parts that significantly improve the properties of the surface layer while not causing a significant increase in manufacturing costs.
Underestimated surface treatments that allow for the shaping of surface layers with favorable properties are plastic working processes. One of them, used for machining parts with curved surfaces, is shot peening. Shot peening, or blasting, is carried out using fine round shot, striking the surface at high speed. (…)

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