( 1. 株洲工学院 机械学院, 株洲 412008;
2. 中南大学 机电学院, 长沙 410083)
摘 要: 针对快速超薄铸轧材料、 几何、 摩擦等多重非线性， 将铸轧辊与板坯之间的力学行为视为热弹塑性接触问题， 应用无网格—有限元耦合方法建立了计算模型，该模型较好地解决了板坯剧烈变形有限元网格畸变问题。 对轧制过程中轧制压力分布进行了分析， 得到其分布规律为轧制压力在变形区中间区达到最大值， 而在入口和出口处逐渐减少。计算结果基本与实测结果吻合， 说明该计算模型和计算是比较有效和可靠的。
关键字: 轧制压力； 接触问题； 耦合模型
thin gauge roll-casting
（ Powder Metallurgy and Special Materials Department,
General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract: As regarding the non-linearity of thin roll-casting materials, geometry and friction. The mechanics beheavior was taken as thermo-elastoplastic contact problem between the roller and slab. By using Element-Free Galerkin-Finite Element(EFG-FE) coupling method, computation model was established to overcome the inconvenience of applying remesh method, for the slab is deformed greatly which leads to the mesh distortion with the the traditional finite element simulation. The rolling force distribution was analyzed to obtain its character which reaches the maximum value in the centre of the rolling zone, while at the entrance and exit, the stress fades away. The results show that the calculated results by the coupling model are close to the measured ones.
Key words: rolling-force; contact problem; coupling model
