An upper bound analysis of rolling process of non-bonded sandwich sheets  

非粘接夹层板轧制过程的上界分析（英文）

作　　者：Heshmatollah HAGHIGHAT Pedram SAADATI 

机构地区：[1]Mechanical Engineering Department, Razi University

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第5期1605-1613,共9页中国有色金属学报（英文版）

摘　　要：Rolling process of symmetrical non-bonded sandwich sheets was investigated by the method of upper bound. A deformation model was proposed and the mathematical relations of the velocity components were developed. The internal, shear and frictional power terms were derived and used in the upper bound model. Through the analysis, the rolling force, mean contact pressure and final thickness of each layer were determined. The validity of the proposed analytical model was discussed by comparing the theoretical predictions with the experimental data found in the literatures. Effects of various rolling conditions such as the flow stress ratio, initial thickness ratio of the raw sheets and total thickness reduction upon the rolling torque were analyzed. The accuracy of the developed analytical model was very high.利用上界方法研究非粘接夹层板的轧制过程。提出了一个变形模型,建立各速率分量间的数学关系。将获得的内功。剪切功和摩擦功的表达式应用到上界模型中。通过分析,得到了轧制力、平均接触压强和各层的最终厚度。通过对比理论预测结果和文献中的实验数据,讨论了分析模型的有效性。分析了不同轧制条件(流变应力比,原料板材初始厚度比,总压下量)对轧制力矩的影响。建立的分析模型具有高的准确性。

关 键 词：flat rolling sandwich sheet upper bound method 

分 类 号：TG331[金属学及工艺—金属压力加工]