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<p>Hammer peening is one of the peening technologies that use a hammer as the peening medium. Peening residual stress is the most important outcome of the peening treatment, as it determines the fatigue resistance and deformation of a component. Finite element simulation is often utilized to predict residual stress. However, numerous peening parameters and their wide range lead to a significant amount of simulation time. This paper aims to propose an algorithm to predict the peening residual stress using a small amount of simulation work. By investigating the influence of the target material models, Johnson–Cook model and Chaboche model, on the evolution of peening stress and strain, we found that the material model determines the cumulative rate of plastic deformation and the upper limit of the residual stress. Under a certain material model, the kinetic energy of the hammer is converted into plastic strain energy at a nearly constant ratio, and the plastic strain is linearly correlated with impact density. Based on these findings, a quadratic curve is introduced to represent the peening compressive stress field, and an algorithm is proposed to determine the coefficients of the curve. The predicted stress profiles agree well with the simulation values, and the simulations are verified by hammer peening experiments.</p>

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Prediction of Compressive Residual Stress of Hammer Peening with Representative Simulation Work

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Xudong Xiao,
  • Jian Du,
  • Guoqiang Gao,
  • Yiqing Zhang,
  • Yibo Li,
  • Renfeng Zhao

摘要

Hammer peening is one of the peening technologies that use a hammer as the peening medium. Peening residual stress is the most important outcome of the peening treatment, as it determines the fatigue resistance and deformation of a component. Finite element simulation is often utilized to predict residual stress. However, numerous peening parameters and their wide range lead to a significant amount of simulation time. This paper aims to propose an algorithm to predict the peening residual stress using a small amount of simulation work. By investigating the influence of the target material models, Johnson–Cook model and Chaboche model, on the evolution of peening stress and strain, we found that the material model determines the cumulative rate of plastic deformation and the upper limit of the residual stress. Under a certain material model, the kinetic energy of the hammer is converted into plastic strain energy at a nearly constant ratio, and the plastic strain is linearly correlated with impact density. Based on these findings, a quadratic curve is introduced to represent the peening compressive stress field, and an algorithm is proposed to determine the coefficients of the curve. The predicted stress profiles agree well with the simulation values, and the simulations are verified by hammer peening experiments.