Modifying Residual Stresses Occurring under Laser Shock Processing through the Generation of Preliminary Stresses

A finite element model has been developed, in which in the course of laser shock processing an elastic preliminary stress is generated in the material. The results are compared with the experimental results, which shows their satisfactory convergence. It is shown that there is a linear relationship...

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Bibliographic Details
Published in:Journal of machinery manufacture and reliability 2023-12, Vol.52 (Suppl 2), p.S132-S140
Main Author: Sakhvadze, G. Zh
Format: Article
Language:English
Subjects:
Compressive properties
Engineering
Finite element method
Laser shock processing
Machines
Manufacturing
Penetration depth
Processes
Reliability
Residual stress
Strength
Wear Resistance of Machines and Structures
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Summary:A finite element model has been developed, in which in the course of laser shock processing an elastic preliminary stress is generated in the material. The results are compared with the experimental results, which shows their satisfactory convergence. It is shown that there is a linear relationship between preliminary stresses and compressive residual stresses in the case when the final compressive residual stresses are in the range of [–20%, –100%] with respect to the yield strength. It has been established that the presence of preliminary tensile stresses in the material leads to a higher value of the final compressive residual stresses and the penetration depths thereof.
ISSN:1052-6188
1934-9394
DOI:10.1134/S1052618823100126