A study on bending deformation behavior induced by shot peening based on the energy equivalence. (March 2023)

• Record Type: Journal Article
• Authors: Wang, T.; Wang, J.B.; Zhang, X.J.; Liu, C.
• Is Part Of: Thin-walled structures. Volume 184(2023)
• Publication Date: 2023-03
• Subjects: Shot peen forming -- Energy equivalence -- Theory of thin plates; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.110519
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Shot peening is an essential process for forming large thin-walled components in aerospace industries. However, it is challenging to determine directly the mapping relationship between shot peening parameters and deformation response because of the complex elastic–plastic deformation of shot-peened components. In this paper, a computational model of bending deformation of peened plate samples is established by examining the shot peening behavior from the aspect of energy equivalence, in which the deformation energy of the shot-peened plate is determined by the total kinetic energy input due to the shot impacts and a correction factor that takes into account the influences of oblique impact, shot interaction and shot overlap on the peen forming process in practice. It is proven that the square of curvature radius is proportional to the cube of the thickness but inversely proportional to the indentation coverage and the average kinetic energy input of a single shot. For the effect of a single shot impact in peen forming, the average kinetic energy input of a single shot is a power function with the indentation diameter. Highlights: Deformation of peened plate is explained from the aspect of energy equivalence. The square of curvature radius is proportional to the cube of the thickness. The square of curvature radius is inversely proportional to the coverage. The square of curvature radius is inversely proportional to the kinetic energy. Kinetic energy input is a power function with the indentation diameter.