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<p>This work evaluates the influence of rolling parameters on the stress leading to plastic instability in steel strips by identifying a constitutive law to model their mechanical response. The study is conducted on A9M steel samples taken after each stand of a tandem rolling mill. Cold-rolling conditions are studied within a velocity-independent plasticity framework, incorporating a plasticity criterion and the Hollomon hardening law. An experimental campaign, including thirty tensile tests, is carried out to characterize the mechanical behavior of the material. Using the shooting and Runge–Kutta methods, an algorithm was developed to incorporate friction and differential mechanical behavior laws by integrating the Karman equation. The model’s reliability was validated by comparing its predictions with experimental data, confirming that the considered parameters significantly impact the sheet metal rolling process. The results indicate that the material behavior can be modeled using the von Mises criterion for the first two stands, which are characterized by weak anisotropy. In contrast, the Hill criterion is recommended for the other stands. Metallographic observations further support this recommendation, which reveals pronounced hardening effects and a distinct rolling.</p>

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Experimental Analysis and Modeling of the Mechanical Behavior of an A9M Steel during Rolling

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Amina Grairia,
  • Walid Ghennai,
  • Billel Smili,
  • Afef Azzi,
  • Alima Mebrek,
  • Mounir Sakmeche,
  • El Fahem Sakher,
  • Mohammed Zaaf,
  • Mosbah Zidani

摘要

This work evaluates the influence of rolling parameters on the stress leading to plastic instability in steel strips by identifying a constitutive law to model their mechanical response. The study is conducted on A9M steel samples taken after each stand of a tandem rolling mill. Cold-rolling conditions are studied within a velocity-independent plasticity framework, incorporating a plasticity criterion and the Hollomon hardening law. An experimental campaign, including thirty tensile tests, is carried out to characterize the mechanical behavior of the material. Using the shooting and Runge–Kutta methods, an algorithm was developed to incorporate friction and differential mechanical behavior laws by integrating the Karman equation. The model’s reliability was validated by comparing its predictions with experimental data, confirming that the considered parameters significantly impact the sheet metal rolling process. The results indicate that the material behavior can be modeled using the von Mises criterion for the first two stands, which are characterized by weak anisotropy. In contrast, the Hill criterion is recommended for the other stands. Metallographic observations further support this recommendation, which reveals pronounced hardening effects and a distinct rolling.