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铜/铝/铜复合板异步轧制变形行为有限元分析
英文标题:Finite element analysis on deformation behavior of Cu/Al/Cu clad sheet during asynchronous rolling
作者:王振华 刘元铭  李旭 
单位:太原理工大学 东北大学 
关键词:铜/铝/铜复合板 异步轧制 搓轧区 摩擦应力 等效应变 
分类号:TG335.81
出版年,卷(期):页码:2022,47(7):175-183
摘要:

 采用ANSYS/LS-DYNA软件建立了铜/铝/铜复合板异步轧制成形弹塑性有限元模型,将有限元模型仿真结果同实际轧制实验结果进行对比,证明有限元模型的准确性。通过对异步轧制变形区进行分析和研究发现,在相同条件下,与同步轧制相比,异步轧制可以有效地减小轧制正应力,并增大后滑区摩擦应力;异步轧制搓轧区可以促进复合板结合界面的金属流动,在其他轧制条件相同的情况下,压下率越大,搓轧区越小,异步速比越大,搓轧区越大;靠近快速辊一侧结合界面铜板的等效应变要大于靠近慢速辊一侧结合界面铜板的等效应变,中间铝板的等效应变大于两侧铜板。随着异步速比的增大,复合板结合界面上两种金属的等效应变的差距逐渐缩小,变形将会更加协调,有利于增强复合板的结合强度。整体研究对铜铝复合板制备工艺的优化提供了理论依据。

 An elastic-plastic finite element model of asynchronous rolling for Cu/Al/Cu clad sheet was established by software ANSYS/LS-DYNA, and the accuracy of the finite element model was proved by comparing the simulation results of finite element model with the actual rolling experiment results. Then, through the analysis and study of asynchronous rolling deformation zone, it is found that under the same conditions, compared with synchronous rolling, the asynchronous rolling effectively reduces the rolling normal stress and increases the friction stress in the backward slip zone, and the cross-shear zone of asynchronous rolling promotes the metal flow at the bonding interface of clad sheet. Under the same conditions of other rolling, the larger the reduction rate is, the smaller the cross-shear zone is, the larger the asynchronous speed ratio is, and the larger the cross-shear zone is. The equivalent strain of the bonding interface copper sheet near the fast roll side is greater than that near the slow roll side, and the equivalent strain of the intermediate aluminum sheet is greater than that of copper sheets on both sides. With the increasing of asynchronous speed ratio, the equivalent strain difference between the two metals on the bonding interface of the clad sheet is gradually reduced, and the deformation becomes more coordinated, which is conducive to enhancing the bonding strength of the clad sheet. The research provides theoretical basis for the preparation process optimization of copper-aluminum clad sheet.

基金项目:
国家重点研发计划项目(2018YFA0707300);国家自然科学基金资助项目(51904206,51974196)
作者简介:
作者简介:王振华(1990-),男,博士,助理研究员 E-mail:wangzhenhua@tyut.edu.cn
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