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TECHNICAL PAPERS

Stress and Strain Histories of Multiple Bending-Unbending Springback Process

[+] Author and Article Information
H.-M. Huang, S.-D. Liu

National Steel Corporation, 12261 Market St., Livonia, MI 48150

S. Jiang

DaimlerChrysler Corporation, 800 Chrysler Dr., Auburn Hills, MI 48326

J. Eng. Mater. Technol 123(4), 384-390 (Jul 24, 2001) (7 pages) doi:10.1115/1.1395574 History: Received July 24, 2001
Copyright © 2001 by ASME
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References

Makinouchi, A., Nakamachi, E., Onate, E., and Wagoner, R. H., 1993, “Numerical Simulation of 3-D Sheet Metal Forming Processes,” Proc. 2nd International Conference, NUMISHEET93, Isehara, Japan.
Lee, J. K., Kinzel, G. L., and Wagoner, R. H., 1996, “Numerical Simulation of 3-D Sheet Metal Forming Processes,” Proc. 3rd International Conference, NUMISHEET96, Dearborn, U.S.A.
Huetink, J. and Baaijens, F. P. T., 1998, “Simulation of Materials Processing: Theory, Methods and Applications,” Proc. Numiform’98, Enschede, the Netherlands.
Gelin, J.-C. and Brunet, M., 1999, “Numerical Simulation of 3-D Sheet Metal Forming Processes,” Proc. 4th International Conference, NUMISHEET99, Besancon, France.
Stein, J. J., 1998, “The Effect of Process Variables on Sheet Metal Springback,” IBEC’98 Paper 982299.
S. Jiang, M. Garnett and S.-D. Liu, 2000, “Springback of Sheet Metal Subjected to Multiple Bending-unbending Cycles,” SAE Technical Paper No. 2000-01-1112.
S.-D. Liu, Jiang, S., and Garnett, M., 2000, “Experimental and Numerical Studies of Multiple Bending-Unbending Springback Processes,” Proc. IDDRG2000. PP203-213.
Habbitt, Kalsson & Sorensen, Inc., 1998, Abaqus/Standard User’s Manual, Version 5.8.
Rama, S., Zhang, J. Du. C., Hu, Y., Shih, H.-C., and Liu, S.-D., 2000, “A Study on the Effects of Simulation Parameters on Springback Prediction,” SAE Technical Paper No. 2000-01-1109.
Sanchez, L. R., 1994, “Experimental Simulation of the Sheet Metal Response to Clamping During Forming,” SAE Technical Paper Series 940942.

Figures

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The corresponding locations of a material element on the blank at five loading steps
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Strain distributions through the thickness predicted by the isotropic hardening model
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Strain distributions through the thickness predicted by the kinematic hardening model
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Stress distributions through the thickness predicted by the isotropic hardening model
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Stress distributions through the thickness predicted by the kinematic-hardening model
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Yield Loci of the lower surface at the bending radii at die-gap 2t based on the isotropic and kinematic hardening models. Notes: TYLC-Trace of Yield Locus Center
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The stress versus strain curves of the lower surface at die gap 2t based on the isotropic and kinematic hardening models
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Strain distributions through the thickness predicted by the solid element
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Stress distributions through the thickness predicted by the solid element
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Comparisons of the strain histories of the lower surface predicted by the shell and the solid elements
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Modified drawbead simulator used in the experiments
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Comparisons between experiments and predicted results
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Comparisons of predicted curvature histories for an element passing through drawbead under different die gaps
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Comparisons of predicted strain histories of the lower surface for an element passing through drawbead under different die gaps

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