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朱然,张永康,孙桂芳,沈旭婷,李普.多点激光冲击强化表面粗糙度的有限元分析[J].稀有金属材料与工程(英文),2018,47(1):33~38.[Zhu Ran,Zhang Yongkang,Sun Guifang,Shen Xuting and Li Pu.Finite Element Analysis of Surface Roughness Generated by Multiple Laser Shock Peening[J].Rare Metal Materials and Engineering,2018,47(1):33~38.]
Finite Element Analysis of Surface Roughness Generated by Multiple Laser Shock Peening
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Received:May 17, 2017  Revised:June 11, 2017
DOI:
Key words: laser shock peening  surface roughness Ra  numerical simulation
Foundation item:中国博士后科学基金
Author NameAffiliation
Zhu Ran,Zhang Yongkang,Sun Guifang,Shen Xuting and Li Pu  
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Abstract:
      Laser shock peening (LSP) is a novel surface processing technique for improving the fatigue properties of metal parts, surface roughness is a critical parameter when fatigue strength resistance is concerned. In this paper, a three-dimensional (3D) finite element model was developed in order to assess the surface roughness evolution induced by multiple LSP. A modified finite element analysis (FEA) method was utilized to compute the vertical displacements profiles, discrete data obtained from the numerical simulations were subsequently input to the proposed discretized formula to calculate the surface roughness Ra. The results obtained from the numerical simulations were in good agreement with the experiment data from open literatures, which validates the proposed approach. After the validation of the numerical model, a parametric study was conducted in order to predict the effects of overlap rates, number of impacts, and pulse energy on surface roughness Ra.