作　　者： ; ; ; ;

机构地区： 北京科技大学机械工程学院

出　　处： 《北京科技大学学报》 2003年第6期563-567,共5页

摘　　要： 采用ANSYS/LS-DYNA软件,建立了斜轧零件基本变形过程的三维有限元分析模型,对不同工况下的斜轧过程进行了计算机数值模拟分析。仿真结果揭示了斜轧过程中轧件内部应力应变场的分布规律;导致Mannesmann缺陷的主要原因是在发生大塑性应变变形情况下,金属内部在承受交变应力作用下产生低周疲劳损伤和破坏。 The 3-dimensional finite element models of tool and workpiece in the skew rolling process were built up with ANSYS/LS-DYNA software. Computer simulations on the ladder shaft in skew rolling under different parameters were conducted. The stress and strain of workpiece in skew rolling were obtained and the forming mechanism of interior defect in the billet was studied. An explanation to the mechanism of Mannesmann effect is that low cycle fatigue damage, in the condition of deformation with large plastic strain, occurs inside the workpiece due to the alternately-changing stress and strain.

关 键 词： 斜轧零件 应力 应变 低周疲劳 损伤机制 内部缺陷 金属成形

领　　域： [金属学及工艺]