重轨全万能轧制显式动力学有限元分析  

Explicit kinetic finite element analysis of universal rolling for heavy rail

作　　者：石俊[1] 邹洋[2] 余志伟[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,江西抚州344000 [2]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《锻压技术》2009年第6期42-46,共5页Forging & Stamping Technology

摘　　要：基于ANSYS/LS-DYNA非线性显式有限元软件,以60kg.m-1重轨为研究对象,采用三维弹塑性热力耦合的有限元方法模拟了重轨在万能轧机组中的变形过程,有效的解决了轧制咬入难、网格畸变量大等难题。分析了典型道次的应力、应变分布和轧制力的变化情况,结果表明:刚咬入时轧件所受的纵向压力和横向压力均为压应力,应变与塑性变形的程度有关,轧制力与速度呈负相关关系。Based on nonlinear explicit finite element soft ANSYS/LS-DYNA and taking 60 kg ·m^-1 heavy rail as a subject, some puzzles were solved effectively, such as entering difficulty of rolling and large mesh distortion , ect. , while taking advantage of 3D elastic-plastic thermal-mechanical coupled FEM to simulate the rolling process of heavy rail in universal mill. The variational situation of stress, strain distribution and draught pressure in typical pass was analyzed. The result shows that both of the vertical pressure and horizontal stress that work on the workpiece at the beginning of entering are compressive stress, strain is related to the degree of plastic deformation, and a negative correlation between rolling force and speed is found as well.

关 键 词：重轨 全万能轧制 应力场 显式有限元 

分 类 号：TG335[金属学及工艺—金属压力加工]