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<p>In rolling models, the accurate prediction of stress and velocity distributions, as well as torque and force, significantly depends on the friction generated in the contact area.</p><p>Classical friction models such as Tresca, Coulomb, and Norton-Hoff often rely on empirical constants that must be experimentally determined for each run, as it significantly affects the model’s accuracy. In this paper, a hydrodynamic friction model based on the hydrodynamic approach, which was developed by Li et al. (Steel Res Int 88:1–7, 2016; Int J Adv Manuf Technol 88:2053–2059, 2017) and then improved and generalized by Mimoune et al. (Int J Adv Manuf Technol 122:4165–4178, 2022; Int J Mater Form 17:60, 2024), has been introduced in the classical rolling model based on the slab method, resulting in the development of a mixed model. Comparisons have been made with the classical rolling model, which incorporates classical friction models, the generalized hydrodynamic rolling model, and the mixed model to assess its performance. The results of this study demonstrate that the mixed model provides more accurate predictions, aligning closely with experimental data compared to other models. Moreover, it offers the advantage of computing the stresses, the velocities, and the neutral-point position as a function of thickness throughout the deformation zone.</p>

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Perturbation of the slab method by incorporating shear effects using a friction model based on a hydrodynamic approach: application to strip rolling

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Aimen Aouni,
  • Salma Sadoune,
  • Mohamed Zaaf

摘要

In rolling models, the accurate prediction of stress and velocity distributions, as well as torque and force, significantly depends on the friction generated in the contact area.

Classical friction models such as Tresca, Coulomb, and Norton-Hoff often rely on empirical constants that must be experimentally determined for each run, as it significantly affects the model’s accuracy. In this paper, a hydrodynamic friction model based on the hydrodynamic approach, which was developed by Li et al. (Steel Res Int 88:1–7, 2016; Int J Adv Manuf Technol 88:2053–2059, 2017) and then improved and generalized by Mimoune et al. (Int J Adv Manuf Technol 122:4165–4178, 2022; Int J Mater Form 17:60, 2024), has been introduced in the classical rolling model based on the slab method, resulting in the development of a mixed model. Comparisons have been made with the classical rolling model, which incorporates classical friction models, the generalized hydrodynamic rolling model, and the mixed model to assess its performance. The results of this study demonstrate that the mixed model provides more accurate predictions, aligning closely with experimental data compared to other models. Moreover, it offers the advantage of computing the stresses, the velocities, and the neutral-point position as a function of thickness throughout the deformation zone.