MECHANICAL ANALYSIS OF CYLINDERS BEING UPSET BETWEEN SPHERICAL CONCAVE PLATEN AND CONCAVE SUPPORTING PLATE  

作　　者：LIU Guohui XIAO Wenhui NI Liyong LIU Zhubai 

机构地区：[1]College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China [2]College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China [3]College of Engineering,Guangdong Ocean University, Zhanjiang 524088, China

出　　处：《Chinese Journal of Mechanical Engineering》2008年第3期99-102,共4页中国机械工程学报（英文版）

基　　金：National Natural Science Foundation of China(No.59235101)

摘　　要：Mechanical analysis of cylinders being upset between spherical concave platen and concave supporting plate is conducted. Rigid-plastic mechanical models for cylinders are presented. When the ratio of height to diameter, is larger than 1, there exists two-dimensional tensile stress in the deformed body, when the ratio is smaller than 1, there exists shear stress in static hydraulic zone. The former breaks through the theory that there is three-dimensional compressive stress irrespective of any ratio of height to diameter. The latter satisfactorily explains the mechanism of layer-like cracks in disk-shaped forgings and the flanges of forged gear axles. The representation of the two models makes the upsetting, theory into correct and perfect stage.Mechanical analysis of cylinders being upset between spherical concave platen and concave supporting plate is conducted. Rigid-plastic mechanical models for cylinders are presented. When the ratio of height to diameter, is larger than 1, there exists two-dimensional tensile stress in the deformed body, when the ratio is smaller than 1, there exists shear stress in static hydraulic zone. The former breaks through the theory that there is three-dimensional compressive stress irrespective of any ratio of height to diameter. The latter satisfactorily explains the mechanism of layer-like cracks in disk-shaped forgings and the flanges of forged gear axles. The representation of the two models makes the upsetting, theory into correct and perfect stage.

关 键 词：Spherical concave platen Concave supporting plate UPSETTING Tensile stress Shear stress 

分 类 号：TH133[机械工程—机械制造及自动化]