Transactions of Materials and Heat Treatment

Title：Constructing curvilinear equation of bulging profile for tube based on digital speckle correlation method

Authors： Liu Jianwei Liu Xinyu Yang Lianfa Hu Guolin Jia Huijie

Unit： Guilin University of Electronic Technology Central South University

KeyWords： digital speckle correlation method bulging profile tube hydroforming flow stress

ClassificationCode：

year,vol(issue):pagenumber：2014,39(4):31-35

Abstract：

In order to obtain the curvilinear equation of bulging profile in constitutive relation and realize convenient measurement, a novel approach, which is an on-line and non-contact measurement, was proposed based on digital speckle correlation method. At first, the DSCM basic principle and application were introduced in brief. Then, a simple and practical tooling, including an apparatus of tube hydroforming and a 3D digital speckle analysis system whose measurement accuracy was 0.001 mm, was introduced. Free-bulged tests were performed for 304 stainless steel and H62 brass alloy tubes at several internal pressure levels, and deformation parameters were output from the measuring system. The equation of bulging profile for tube at several internal pressure levels was obtained by means of point cloud building 3-D reconstructing and generatrix extracting. Compared with direct measurement method, the relative error is less than 10%. The results show that the developed approach is acceptable to define the bulging profile parameter of tube.

Funds：

国家自然科学基金资助项目（51065006，51271062）；广西自然科学基金资助项目（2013GXNSFBA019245）

刘建伟(1978-)，男，博士研究生，高级实验师

Reference：

［1］Fuchizawa S, Narazaki M, Yuki H. Bulge test for determining stress-strain characteristics of thin tubes
［J］. Advanced Technology of Plasticity, 1993, 2(1): 488-493.

［2］Strano M, Altan T. An inverse energy approach to determine the flow stress of tubular materials for hydroforming applications
［J］. Journal of Materials Processing Technology, 2004, 146: 92-96.

［3］林艳丽, 何祝斌, 苑世剑.管材自由胀形时胀形区轮廓形状的影响因素
［J］. 金属学报, 2010, 46(6): 729-735.

Lin Yanli, He Zhubin, Yuan Shijian. The factors affecting the profile of middle bulge region during tube bulge test
［J］. Acta Metallurgica Sinica, 2010, 46(6):729-735.

［4］Yang Lianfa, Guo Cheng. Determination of stress-strain relationship of tubular material with hydraulic bulge test
［J］. Thin-Walled Structures, 2008, 46: 147-154.

［5］杨连发, 郭成.液压胀形薄壁管材料流动应力方程的构建
［J］. 西安交通大学学报, 2006, 40(3): 332-336.

Yang Lianfa, Guo Cheng. Stress strain relationship of tubular metal in hydraulic bulging test
［J］. Journal of Xian Jiaotong U-niversity, 2006, 40(3):332-336.

［6］Sokalowski T, Gerke K, Ahmetoglu M, et al. Evaluation of tube formability and material characteristics: hydraulic bulge testing of tubes
［J］. Journal of Materials Processing Technology, 2000, 98: 34-40.

［7］Peters W H, Ranson W F, Sutton M A, et al. Application of digital correlation methods to rigid body mechanics
［J］. Opt. Eng.,1983,22(6):738-742.

［8］陈涛, 刘检华, 马寅佶. 基于数字散斑相关法的弯管残余应力测量系统
［J］. 仪器仪表学报, 2011, 32(10): 2382-2387.

Chen Tao, Liu Jianhua, Ma Yinji. Residual stress measurement system of bend tube based on DSCM
［J］. Chinese Journal of Scientific Instrument, 2011，32(10):2382-2387.

［9］张德海, 梁晋, 唐正宗, 等.板料变形三维数字散斑应变测量分析系统研究
［J］. 锻压技术, 2010, 35(4): 27-31.

Zhang Dehai, Liang Jin, Tang Zhengzong, et al. 3D digital speckle analysis system for dynamic strain measurement in sheet deformation
［J］. Forging & Stamping Technology, 2010, 35(4):27-31.

［10］陈华. 基于数字散斑相关方法的视觉变形测量技术研究
［D］. 哈尔滨: 哈尔滨工业大学, 2008.

Chen Hua. Study of Vision Deformation Measurement Technologies Based on Digital Speckle Correlation Method
［D］. Harbin: Harbin Institute of Technology, 2008.

［11］Jin G C, Wu Z, Bao N K, et al. Digital speckle correlation method with compensation technique for strain field measurements
［J］. Optics and Lasers in Engineering, 2003, 39: 457-464.

［12］Meng L B, Jin G C, Yao X F, et al. 3D full-field deformation monitoring of fiber composite pressure vessel using 3D digital speckle correlation method
［J］. Polymer Testing, 2006, 25:42-48.

［13］梁晋, 胡浩, 唐正宗, 等.数字图像相关法测量板料成形应变
［J］. 机械工程学报,2013, 49(10): 77-83.

Liang Jin, Hu Hao, Tang Zhengzong, et al. Digital image correlation method for strains measurement of metal sheet forming
［J］. Journal of Mechanical Engineering, 2013, 49(10):77-83.

［14］王永信, 丁恩伟, 梁晋, 等. 数字图像相关法的板料成形极限研究与应用
［J］. 锻压技术, 2013, 38(3): 15-18.

Wang Yongxin, Ding Enwei, Liang Jin, et al. Forming limit research and application of digital image correlation method in sheet metal forming process
［J］. Forging & Stamping Technology, 2013, 38(3): 15-18.

［15］Tang Z Z, Liang J, Xiao Z Z, et al. Three-dimensional digital image correlation system for deformation measurement in experimental mechanics
［J］. Optical Engineering, 2010, 49(10):1-8.

Service：

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