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<p>Spinning of A356 aluminum alloy wheel, a hot extrusion-based technique, enhances wheel performance through grain texture strengthening. To provide a foundation for dynamic simulations, this work investigated the mechanical properties of the A356 spinning wheel rim material. Initial quasi-static tests at 25 °C compared cast and spinning rim materials, followed by an in-depth study of the superior spinning rim material via uniaxial tensile tests across various strain rates (0.001-100/s) and temperatures (25-400 °C). Experimental results revealed that flow characteristics are highly sensitive to both strain rate and temperature. Fracture mechanisms under different conditions were characterized using scanning electron microscope (SEM) analysis. Furthermore, a modified Johnson-Cook (MJC) dynamic constitutive model was developed from the original Johnson-Cook (OJC) model, reducing the prediction error of material flow stress to within 1 %. The accuracy of the MJC model was validated by tensile simulations showing excellent agreement with experimental data and further confirmed via a wheel radial impact test, where it improved rim deformation prediction accuracy by 17 percentage points relative to the OJC model. These findings serve as an essential basis for the structural design and crashworthiness analysis of high-performance aluminum wheels, ensuring more reliable safety assessments throughout the design cycle.</p>

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Dynamic Mechanical Behavior and Modified Johnson-Cook Modeling of A356 Aluminum Alloy for Spinning Rim Applications

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • Zheming Tong,
  • Mengqiang Li,
  • Zhenming Li,
  • Yue Yu,
  • Shuiguang Tong

摘要

Spinning of A356 aluminum alloy wheel, a hot extrusion-based technique, enhances wheel performance through grain texture strengthening. To provide a foundation for dynamic simulations, this work investigated the mechanical properties of the A356 spinning wheel rim material. Initial quasi-static tests at 25 °C compared cast and spinning rim materials, followed by an in-depth study of the superior spinning rim material via uniaxial tensile tests across various strain rates (0.001-100/s) and temperatures (25-400 °C). Experimental results revealed that flow characteristics are highly sensitive to both strain rate and temperature. Fracture mechanisms under different conditions were characterized using scanning electron microscope (SEM) analysis. Furthermore, a modified Johnson-Cook (MJC) dynamic constitutive model was developed from the original Johnson-Cook (OJC) model, reducing the prediction error of material flow stress to within 1 %. The accuracy of the MJC model was validated by tensile simulations showing excellent agreement with experimental data and further confirmed via a wheel radial impact test, where it improved rim deformation prediction accuracy by 17 percentage points relative to the OJC model. These findings serve as an essential basis for the structural design and crashworthiness analysis of high-performance aluminum wheels, ensuring more reliable safety assessments throughout the design cycle.