锥形模圆柱体超塑性挤压非局部摩擦分析  

Superplastic wire Extrusion of Cylindrical Body Through a Cone-shaped Using Nonlocal Friction Law

作　　者：李茂林[1] 扶名福[1] 闫小青[1] 

机构地区：[1]南昌大学机电学院

出　　处：《南昌大学学报（理科版）》2007年第6期586-589,共4页Journal of Nanchang University(Natural Science)

基　　金：教育部博士点基金资助项目(20050403002)

摘　　要：为了考虑金属材料表面微凸结构对模具与工件接触区域上的非局部摩擦效应,在锥形模圆柱体超塑性挤压加工分析中,采用Oden等提出的非局部摩擦定律代替经典的库仑摩擦定律,利用主应力法或工程法建立了相应问题的积微分形式的力平衡方程。在简化的情况下,采用摄动法求得所论问题的近似解,并分析了影响应力的非局部效应的相关因素。The nonlocal friction law proposed by oden et al is adopted in order to consider the nonlocal friction effect of the asperities on the stress distribution about superplastic wire extrusion of cylindrical body through a cone - shaped die. The mechanical equilibrium equation with the integral -differential form is obtained by using the engineering method or slab method, and solved approximately by using the pert - urbation method. The stresses with nonlocal friction law are obtained, and the factors which affect the nonlocal friction effect are analyzed.

关 键 词：超塑性挤压 圆柱体 非局部摩擦 近似解 

分 类 号：TG3[金属学及工艺—金属压力加工]