楔横轧多楔轧制展宽段应力与应变有限元分析

楔横轧多楔轧制是主楔和侧楔同时对轧件进行径向压下、横向扩展并轴向延伸的塑性成形。多楔轧制与单楔轧制相比 ,其成形过程中应力场、应变场变化规律更加复杂。针对楔横轧多楔轧制特点 ,在LS/DYNA有限元软件基础上进行二次开发 ,成功地仿真了楔横轧多楔轧制过程 ,并对其展宽段的应力、应变场变化规律进行详细分析 ,得到了在料既不堵又不拉情况下多楔轧制应力比单楔轧制应力变化时间长、变化幅度大的结论

Finite Element Analysis of Stress and Strain during Stretching Stage for Multi - wedge Cross Wedge Rolling

Multi-wedge Cross Wedge Rolling(MCWR), is one kind of plastic deformation, including radial compressiing, axial stretching and horizontal enlarging by both wedges at the same time.Compared with the Single-wedge Cross Wedge Rolling, the fields of stress and strain distributions in MCWR are more complicaterd. In this paper, a new and innovative numerical model of MCWR was developed, using advanced explicit dynamic finite element method (FEM).The rolling process under stretching stage in MCWR was simulated successfully, the three-dimensional regularities of stress and strain distributions was analyzed at length, and illuminated in figures. Experimental studies were conducted in order to validate the FEM model and its result. The according conclusion was drawn in contrast to the Single-wedge Cross Wedge Rolling,i.e, the variation extent and time in stress in MCWR are more.