工程科学学报2017，Vol.39Issue(8)：1198-1206,9.DOI:10.13374/j.issn2095-9389.2017.08.009
基于Lemaitre模型的辊式冲裁工艺断面质量分析
Analysis of sheared edge quality in rotary blanking process based on Lemaitre damage model
刘倩 1韩静涛 2田亚强 1郑小平 1宋进英 1陈连生1
作者信息
- 1. 华北理工大学冶金与能源学院现代冶金技术教育部重点实验室, 唐山 063210
- 2. 北京科技大学材料科学与工程学院, 北京 100083
- 折叠
摘要
Abstract
To accurately describe the material degradation process from elastoplastic deformation to final rupture, an elastoplastic constitutive model was established to feature damage and crack initiation. A user-defined material subroutine VUMAT was developed, based on the Abaqus/ Explicit platform, and its reliability was validated with an example. The damage parameter values were deter-mined in cyclic loading-unloading tensile tests, using the Young's modulus weakening method. To predict the sheared edge quality, a finite element model of rotary blanking coupling with a Lemaitre damage model was built and the numerical results were compared with experimental results. The influences of blanking clearance, die wear and sheet metal thickness on the sheared edge quality, blanking force and torque were investigated. The results show that the sheared edge quality of the leading cutting edge is generally better than that of the trailing cutting edge, but the burnish depth of the leading cutting edge tilts at an angle. The rollover is larger, as is the die clearance. There is an extreme increase in the burr height when the degree of die wear is higher. The highest blanking force and torque values increase as the sheet metal thickness increases.关键词
冲裁工艺/断面质量/Lemaitre损伤模型/VUMAT/模具磨损Key words
blanking process/sheared edge quality/lemaitre damage model/VUMAT/die wear分类
矿业与冶金引用本文复制引用
刘倩,韩静涛,田亚强,郑小平,宋进英,陈连生..基于Lemaitre模型的辊式冲裁工艺断面质量分析[J].工程科学学报,2017,39(8):1198-1206,9.
