INVESTIGATION OF RESIDUAL STRESS FIELD IN THE CURVED SURFACE OF ROUND ROD SUBJECTED TO MULTIPLE LASER SHOCK PEENING

Xingquan Zhang, Wenwu Niu, Yuande Yin, Jinxiu Fang, Syed Sohail Ahmad Shah and Yuanchao Yu
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Xingquan Zhang: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China
Wenwu Niu: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China
Yuande Yin: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China
Jinxiu Fang: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China
Syed Sohail Ahmad Shah: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China
Yuanchao Yu: AnHui Province Key Laboratory of Special Heavy Load Robot, School of Mechanical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 05, 1-11

Abstract: Laser shock peening (LSP) was employed to squeeze compressive residual stress (CRS) into the curved surface of the round rod with diameter of 16mm. The residual stress field was induced by nine laser shots irradiating at different locations along the specified path. The developing process of the residual stress field was investigated with finite element analysis, and the corresponding experiments were also carried out to validate the calculated results. Results demonstrate that multiple LSP with 50% overlapping rate can result in residual stress field with the maximum CRS varying from 155.2MPa to 198.8MPa along the direction of the rod axis. The peened surface appears wavy in shape and the maximum depth of plastic deformation in the curved surface is 13.41μm. The value of surface roughness increases from 3.87μm to 4.65μm.

Keywords: Multiple laser shock peening; curved surface; residual stress; plastic deformation (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500293

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