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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.7 P.532-542

http://doi.org/10.1631/jzus.A1000458


Analytical model for straight hemming based on minimum energy method


Author(s):  Qian Wang, Xiang-huai Dong, He-zong Li, Hai-ming Zhang

Affiliation(s):  National Engineering Research Center of Die & Mold CAD, Shanghai Jiao Tong University, Shanghai 200030, China

Corresponding email(s):   dongxh@sjtu.edu.cn

Key Words:  Analytical model, Minimum energy method, Defects, Large deformation, Hemming


Qian Wang, Xiang-huai Dong, He-zong Li, Hai-ming Zhang. Analytical model for straight hemming based on minimum energy method[J]. Journal of Zhejiang University Science A, 2011, 12(7): 532-542.

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author="Qian Wang, Xiang-huai Dong, He-zong Li, Hai-ming Zhang",
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%A Xiang-huai Dong
%A He-zong Li
%A Hai-ming Zhang
%J Journal of Zhejiang University SCIENCE A
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%P 532-542
%@ 1673-565X
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000458

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T1 - Analytical model for straight hemming based on minimum energy method
A1 - Qian Wang
A1 - Xiang-huai Dong
A1 - He-zong Li
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J0 - Journal of Zhejiang University Science A
VL - 12
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SP - 532
EP - 542
%@ 1673-565X
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PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1000458


Abstract: 
An analytical model for straight hemming was developed based on minimum energy method to study the effect of flanging die corner radius on hemming qualities. In order to calculate plastic strain and strain energy more exactly, the neutral layer of specimen corner after hemming is assumed to be a half ellipse with its major semi-axis unknown. Isotropic hardening rule is adopted to describe bending and reverse bending processes neglecting Bauschinger effect. The model takes into account the material property parameters in order to satisfy a wide application range of different materials. Specimen profile, creepage/growing (roll-in/roll-out) and maximum equivalent strain are predicted, which are greatly influenced by the flanging die corner radius. Experimental facilities were designed and hemming experiments were undertaken. The predicted results of the present analytical model were compared to experimental data as well as finite element (FE) simulation results. It was confirmed that they are in good agreement, and the model can be used to evaluate whether the material used as an outer panel for hemming is appropriate and to optimize process parameters when the material used for hemming is changed.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Buranathiti, T., Cao, J., 2004. An effective analytical model for springback prediction in straight flanging processes. International Journal of Materials and Product Technology, 21(1-3):137-153.

[2]Hu, P., Li, D.Y., Li, Y.X., 2003. Analytical models of stretch and shrink flanging. International Journal of Machine Tools and Manufacture, 43(13):1367-1373.

[3]Hu, X., Lin, Z.Q., Li, S.H., Zhao, Y.X., 2010. Fracture limit prediction for roller hemming of aluminum alloy sheet. Materials and Design, 31(3):1410-1416.

[4]Lin, G.S., Hu, S.J., Cai, W., 2009. Evaluation of formability in bending/hemming of aluminum alloys using plane-strain tensile tests. Journal of Manufacturing Science and Engineering, 131(5):051009-051018.

[5]Livatyali, H., 1998. Computer Aided Process Design of Selected Sheet Metal Bending Process-Flanging & Hemming. PhD Thesis, The Ohio State University, Ohio, USA.

[6]Livatyali, H., Altan, T., 2001. Prediction and elimination of spring back in straight flanging using computer aided design methods. Part 1: experimental investigation. Journal of Materials Processing Technology, 117(1-2):262-268.

[7]Livatyali, H., Larris, S.J., 2004. Experimental investigation on forming defects in flat surface-convex edge hemming: roll, recoil and warp. Journal of Materials Processing Technology, 153-154:913-919.

[8]Livatyali, H., Muderrisoglu, A., Ahmetoglu, M.A., Akgerman, N., Kinzel, G., Altan, T., 2000. Improvement of hem quality by optimising flanging and pre-hemming operations using computer aided die design. Journal of Materials Processing Technology, 98(1):41-52.

[9]Livatyali, H., Wu, H.C., Altan, T., 2002. Prediction and elimination of springback in straight flanging using computer-aided design methods Part 2: FEM predictions and tool design. Journal of Materials Processing Technology, 120(1-3):348-354.

[10]Livatyali, H., Laxhuber, T., Altan, T., 2004. Experimental investigation of forming defects in flat surface-convex edge hemming. Journal of Materials Processing Technology, 146(1):20-27.

[11]Maoût, N.L., Thuillier, S., Manach, P.Y., 2009. Aluminum alloy damage evolution for different strain paths-application to hemming process. Engineering Fracture Mechanics, 76(9):1202-1214.

[12]Muderrisoglu, A., Murata, M., Ahmetoglu, M.A., Kinzel, G., Altan, T., 1996. Bending, flanging, and hemming of aluminum sheet-an experimental study. Journal of Materials Processing Technology, 59(1-2):10-17.

[13]Song, N., Qian, D., Cao, J., Liu, W.K., Li, S.F., 2001. Effective models for prediction of springback in flanging. Journal of Engineering Materials and Technology, 123(4):456-461.

[14]Wang, C.T., Kinzel, G., Altan, T., 1994. Wrinkling criterion for an anisotropic sheet with compound curvatures in sheet forming. International Journal of Mechanical Sciences, 36(10):945-960.

[15]Wang, C.T., Kinzel, G., Altan, T., 1995. Failure and wrinkling criteria and mathematical modeling of shrink and stretch flanging operations in sheet metal forming. Journal of Materials Processing Technology, 53(3-4):759-780.

[16]Wang, N.M., Wenner, M.L., 1974. An analytical and experimental study of stretch flanging. International Journal of Mechanical Sciences, 16(2):137-143.

[17]Zhang, G.H., 2001. Analysis and Optimization of Sheet Metal Flanging and Hemming Processes. PhD Thesis, The University of Michigan, Michigan, USA.

[18]Zhang, G.H., Hao, H.Q., Wu, X., Hu, S.J., Harper, K., Faitel, W., 2000. An experimental investigation of curved surface-straight edge hemming. Journal of Manufacturing Processes, 2(4):241-246.

[19]Zhang, G.H., Wu, X., Hu, S.J., 2001. A study on fundamental mechanisms of warp and recoil in hemming. Journal of Engineering Materials and Technology, 123(4):436-441.

[20]Zhang, G.H., Hu, S.J., Wu, X., 2003. Numerical analysis and optimization of hemming processes. Journal of Manufacturing Processes, 5(1):87-96.

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