纯铜叠轧的刚塑性有限元模拟

Finite Element Simulation of Rigid-plastic on Roll-bonding Copper Sheets

采用大型有限元软件Deform-3D对纯铜双板同步和异步叠轧制备超细晶块材过程进行数值模拟,分析了板厚为0.8 mm和2 mm、压下量50%的叠轧过程中纯铜的应力应变场、温度场以及金属流动线速度分布。结果表明,在异步轧制时,应力场和金属流动线速度的非对称分布导致在变形区形成了一个搓轧区,使得异步叠轧比同步叠轧的轧制力低、应变量大和温度高,说明采用异步叠轧更有利于制备超细晶块材,为后续异步叠轧研究提供数据支持。

This paper simulates the symmetrical roll-bonding and asymmetrical roll-bonding （ARB） process of bimetal composite sheet by FEM software Deform-3D. And then the stress-strain and temperature and metal flow rate in process of roll-bonding that the copper thickness is 0.8mm and 2mm and reduction is 50%. The numerical simulation indicate that, a rolling rubbing is formed in the deformation zone because the asymmetry distribution of stress-stain and metal flow rate. This area makes rolling force reduce,strain increase and higher temperature under ARB process. This results show that the ARB is more conducive for prepared ultra-fine grain bulk,and can provide data to support the follow-up ARB experiment.