Transactions of Materials and Heat Treatment

Title：Forming limit research and application of digital image correlation method in sheet metal forming process

Authors： WANG Yong-xin DING En-wei LIANG Jin CUI Xue-long YU Miao

Unit： Xi'an Jiaotong University

KeyWords： sheet deformation limitation digital image correlation method limit strain measurement

ClassificationCode：TG386

year,vol(issue):pagenumber：2013,38(3):15-18

Abstract：

In order to overcome the deficiencies in recent forming limit measuring method of sheet metal， a new method based on digital image correlation method was achieved using XJTUDIC three\|dimensional digital speckle strain measurement system. First, the measurement system was set on the cupping testing machine, the online and audience measurement of the strain were realized by recording a series of images from the initial to the rupture of the experimental process. Then, through intercepting lines on the last image before rupture and fitting the data，and the ultimate strain was gained by interpolating the necking region，so the forming limit curves were obtained. The feasibility and effectiveness of this method were verified by measuring the forming limit curve of carbon steel SPCC36.

Funds：

国家自然科学基金资助项目（51275389）；江苏省科技创新项目(SBC201210069)

Reference：

［1］张德海，梁晋，郭成. 板料成形回弹三维光学测量技术研究[J]. 西安交通大学学报，2009,43(9) 51-55.Zhang D H, Liang J, Guo C. 3D optical measuring technique for springback measurement in sheet forming[J]. Journal of Xian Jiaotong University, 2009,43(9) 51-55.
［2］陈银莉, 余伟, 黄秀声. 数字图像处理技术进行方形网格应变测量[J]. 塑性工程学报, 2009, 16(3): 182-186.Chen Y L, Yu W, Huang X S. Application of digital image processing for strain analysis by square grid method[J]. Journal of Plasticity Engineering, 2009, 16(3): 182-186.
［3］魏红芹, 于德弘. 基于立体视觉的坐标网格分析法[J]. 塑性工程学报, 2002, 9(2): 52-55.Wei H Q, Yu D Y. Coordinate grid analysis method based on stereo vision[J]. Journal of Plasticity Engineering, 2002, 9(2): 52-55.
［4］GB/T 24171.22009，金属材料薄板和薄带成形极限曲线的测定第2部分:实验室成形极限曲线的测定[S].GB/T 24171.2—2009，Metallic materials. Sheet and strip.Determination of forming limit curves. Part 2:Determinations of forming limit curves in laboratory[S].
［5］Yoneyama S, Morimoto Y. Accurate displacement measurement by correlation of colored random patterns [J]. JSME Int. J. A\|Solid M., 2003,46(2):178-184.
［6］孟利波，金观昌，姚学峰，等. 数字散斑相关方法及其在碳纤维复合材料压力容器变形测量中的应用[J]. 光学技术，2006，32(2): 163-170.Meng L B, Jin G C, Yao X F, et al. The digital speckle correlation method and the application in deformation measurement of carbon fiber composite pressure vessel[J]. Optical Technique, 2006，32(2): 163-170.
［7］丁恩伟,蔡勇,梁晋,等.基于Geomagic和UG的快速参数化逆向建模方法[J].机械研究与应用,2012,(3):173-175.Ding E W, Cai Y, Liang J, et al. Rapid parametric reverse modeling based on Geomagic and UG[J]. Mechanical Research ＆ Application, 2012,(3):173-175.
［8］谢英，万敏，韩非. 板料成形极限应力图研究[J]. 机械工程学报，2005,41(7): 45-48.Xie Y, Wan M, Han F. Investigation of forming limit stress metals[J]. Chinese Journal of Mechanical Engineering, 2005,41(7): 45-48.
［9］杜生亚.陈炜. 应力应变分析在覆盖件成形工艺设计中的实际应用[J]. 锻压技术，2000,25(6):10-13.Du S Y, Chen W. Practical application of stress and strain analysis in forming process design for automobile panel[J].Forging & Stamping Technology, 2000,25(6):10-13.

Service：

【This site has not yet opened Download Service】【Add Favorite】