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This paper is devoted to a numerical modelling of water droplets shock on an Al 7075-T6 alloy surface in order to simulate the waterjet peening process effects. This simulation enables the prediction of the main surface properties resulting from high-velocity water droplet impingement. This investigation focuses on examining the effects of waterjet peening on the surface properties of Al 7075-T6 using different material models to simulate its elastic-plastic behaviour. The hardening laws tested in this work include the isotropic, kinematic, nonlinear isotropic-kinematic, and Johnson-Cook models. It was found that the most precise numerical results are obtained with the Johnson–Cook hardening model, while the other material models overestimated the experimental surface properties, particularly in terms of residual stress, roughness parameters and plastic strain.

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Material Model Validation for Waterjet Peening Process Simulation

  • 会议论文

  • 发表日期：

    2025年

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  • Rihem Amri,
  • Adnen Laamouri,
  • Raouf Fathallah

摘要

This paper is devoted to a numerical modelling of water droplets shock on an Al 7075-T6 alloy surface in order to simulate the waterjet peening process effects. This simulation enables the prediction of the main surface properties resulting from high-velocity water droplet impingement. This investigation focuses on examining the effects of waterjet peening on the surface properties of Al 7075-T6 using different material models to simulate its elastic-plastic behaviour. The hardening laws tested in this work include the isotropic, kinematic, nonlinear isotropic-kinematic, and Johnson-Cook models. It was found that the most precise numerical results are obtained with the Johnson–Cook hardening model, while the other material models overestimated the experimental surface properties, particularly in terms of residual stress, roughness parameters and plastic strain.