圆形工件等通道转角挤压应变分布和塑性变形区的三维有限元分析_李豪.pdf

DOI:10.14158/ki.1001-3814.2009.23.037 年 月 金属铸锻焊技术 · · 2009 12 Casting Forging Welding 圆形工件等通道转角挤压应变分布和 塑性变形区的三维有限元分析 李豪， 李赛毅 （华南理工大学机械与汽车工程学院，广东广州510640 ） 摘 要：利用三维有限元方法模拟了圆形工件的等通道转角挤压过程，分析了工件上应变分布情况，其与理 论值和二维模拟的结果符合较好。 通过对稳定变形阶段塑性变形区的分析，探讨了应变分布不均匀的原因，所得 结果有利于理解工件变形过程和优化工艺设计。 关键词： 等通道转角挤压；有限元；应变分布；塑性变形区 中图分类号： 文献标识码： 文章编号： TG376 A 1001-3814(2009)23-0142-03 3-D Finite Element Analysis of Strain Distribution and Plastic Deformation Zone in Equal Channel Angular Extrusion of Cylinder Workpiece LI Hao, LI Saiyi (School of Mechanics and Automobile Engineering, South China University of Technology, Guangzhou 510640, China) Abstract ： Equal channel angular extrusion (ECAE) of cylinder workpiece was simulated using 3D finite element method. The distribution of plastic strain in the workpiece was analyzed and the results agreed well with those of theoretical analysis and 2D simulations. The origin of the strain inhomogeneity was explored from the perspective of plastic deformation zone in the steady state. The results thus obtained contribute to a better understanding of the deformation behavior and the process design in ECAE. Key words ： equal channel angular extrusion (ECAE); finite element ； strain distribution; plastic deformati