Y型三辊轧制变形过程有限元模拟与实验

Deformation Simulation of 3-Roll Rolling with Finite Element Method and Visual-plasticity Approach

在弹塑性有限变形理论的基础上，应用大型通用有限元分析软件ANSYS对平三角孔型中轧件的变形进行了模拟．该分析软件是基于Newton－Raphson法的迭代过程，用一系列近似值逐渐收敛于实际的非线性解．为验证有限元模拟的准确性，还应用视塑性方法进行了实验研究．为保证实验精度，采用数控技术和激光技术刻制网格，并采用体视显微镜放大网格，以及采用计算机图像处理系统自动采集数据．计算结果与实验符合较好．

The deformation characteristics are complicated in 3-roll rolling process. The deformation ofthe workpiece in round-flat pass was simulated with the general FEM software package ANSYS, on the basisof the elastic-plastic deformation theory. The Newton-Raphson method is used to the actual nonlinear result.In order to verify the finite element simulation, the same deformation process was experimentally investigatedwith the visual-plasticity aPProach. In the experiment the digital control technology and the laser marking system were used to make the grids, the microscope to enlarge the grids and the computer image analysis systemto read the original data automatically. The FEM results agree with the experiment well.