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Journal of Materials Shaping Technology

, Volume 6, Issue 2, pp 91–101 | Cite as

Stretch flanges: Formability and trimline development

  • Stephen Dudra
  • Sanjay Shah
Article

Abstract

This article investigates the applicability of stretch flanging models to predict the peak strain and the trimline for nonaxisymmetric flanges. Two models used were: (a) a closed form solution for the axisymmetric case and (b) a finite element method for the non-axisymmetric case. To verify the models, flanging experiments using 1008 AK steel were carried out. The peak strain (which governs the flange formability) and the final flange length (which determines the location of the trimline) were measured and compared to the corresponding model results. Based on this study, design graphs expressed in terms of the geometrical parameters are constructed. These graphs are intended to aid the part designer and the die designer to determine the flange formability and to determine the trimline location.

Keywords

Flange Free Edge Peak Strain Form Limit Diagram Finite Element Method Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Sheet Steel Formability, American Iron and Steel Institute, Washington, D.C., 1984.Google Scholar
  2. 2.
    A. Kasper: Advanced Engineering Staff, General Motors Technical Center, private communication, 1986.Google Scholar
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    N.M. Wang and M.L. Wenner:International Journal of Mechanical Sciences, 1974, vol. 16, pp. 135–143.CrossRefGoogle Scholar
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    N.M. Wang:Novel Techniques in Metal Deformation Testing, R.H. Wagoner, ed., AIME, 1983, pp. 309–321.Google Scholar
  5. 5.
    M. Tharrett: General Motors Research Labs—Mathematics Dept., unpublished research, 1984.Google Scholar

Copyright information

© Springer-Verlag New York Inc 1988

Authors and Affiliations

  • Stephen Dudra
    • 1
  • Sanjay Shah
    • 2
  1. 1.Physics Dept.GM Research LaboratoriesUSA
  2. 2.GM Technical CenterManufacturing Building A/MD-31WarrenUSA

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