Purpose The purpose of this study is to focus on numerical simulation investigations of deformation analysis of asymmetric break-down rolling of a hollow steel, which seriously affects the service life of the final product. Design/methodology/approach The 3D rigid-plastic thermo-mechanical coupled finite element method (FEM) for a large strain was used to analyze metal deformation in the deformation zone for asymmetric rolling with different roller diameters. Findings The distribution of stress, strain and dimension accuracy for different diameters was obtained. The results show that the additional shear strain which is different from the normal compression deformation is generated in an asymmetric rolling process. The higher the ratio between upper and lower diameters, the greater the additional shear deformation. Originality/value Asymmetric rolling is an important factor affecting the dimensional accuracy of the hollow steel. This study can provide a theoretical basis for developing a reasonable rolling process of the hollow steel.

中文翻译：

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空心钢不对称破断轧制变形分析

目的本研究的目的是对严重影响最终产品使用寿命的空心钢不对称断裂轧制变形分析进行数值模拟研究。设计/方法/途径 大应变的 3D 刚塑性热机械耦合有限元法 (FEM) 用于分析不同辊径不对称轧制变形区中的金属变形。结果 获得了不同直径的应力、应变和尺寸精度的分布。结果表明，非对称轧制过程中产生了不同于法向压缩变形的附加剪切应变。上下直径之比越高，附加剪切变形越大。原创性/价值 不对称轧制是影响空心钢尺寸精度的重要因素。该研究可为制定合理的中空钢轧制工艺提供理论依据。