General Solutions of the Bond Rolling of Unbounded Sandwich Sheet with Outer Soft and Inner Hard Layers

摘要

This study mainly aims at the bond rolling of unbounded sandwich sheet with outer soft and inner hard layers. Constant shear friction ( τ = mk ) between the rolls and the sandwich sheet is assumed. Due to the sandwich sheet unbounded before rolling, three-layer sheets are not bonded at the entrance of the roll gap. Therefore the stress field of the roll gap for this study is different from that for the sandwich sheet bonded firmly before rolling. The neutral point between the roll and the sandwich sheet, the horizontal stress of whole sandwich sheet, the horizontal stresses in the component layers of sandwich sheet, the shear stress at the interface of sandwich sheet, the rolling force, and rolling torque etc., are easily and effectively calculated via this model. Especially, the stress field of this model is discussed in three cases: the initial thickness ratio of sandwich sheet (β_i) is greater than, less than, and equal to reduction (r), respectively. It is important to obtain the bonding point at the interface and the thickness ratio of sandwich sheet at the exit. This study offers useful knowledge to conduct the experimental bonding conditions.