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Journal of Applied Metalworking

, Volume 1, Issue 1, pp 41–49 | Cite as

Evaluating the GMR-Limiting Dome Height Test as a new measure of press formability near plane strain

  • Robert A. Ayres
  • William G. Brazier
  • Vincent F. Sajewski
Article

Abstract

A number of tests have been proposed as predictors of press shop formability. The most common of these are the Olsen cup, tensile, and hardness tests. However, none of these tests are very successful. Recently, A.K. Ghosh proposed the Limiting Dome Height test (LDH) to predict formability since this test modifies specimens to produce the same strain state at failure as found in a particular stamping. This report describes a correlation study in which specimens were collected from lots of steel and aluminum which exhibited either good or bad press performance in automotive stampings. The failure mode, in all cases, was splitting which initiated within ± 2 pct of plane strain. These specimens were evaluated by the LDH, Olsen, and tensile tests and compared to the actual press performance. Only the LDH test adequately separated the acceptable sheets from the bad.

Keywords

Sheet Metal Press Performance Total Elongation Minor Strain Apply Metalworking 
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

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    S.S. Hecker:Metals Eng. Quart., 1974, vol. 14, p. 30.Google Scholar
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    J.D. Jevons,The Metallurgy of Deep Drawing and Pressing, John Wiley and Sons, Inc., 1942.Google Scholar
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    A.K. Ghosh,Metals Eng. Quart., 1975, vol. 15, p. 53.Google Scholar
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    W.A. Backofen, I.R. Turner, and D.H. Avery,Trans. ASM, 1964, vol. 57, p. 980.Google Scholar
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    Mechanics of Sheet Metal Forming, D.P. Koistinen and N.M. Wang, eds. Plenum Press, New York, in press.Google Scholar

Copyright information

© American Society for Metals 1979

Authors and Affiliations

  • Robert A. Ayres
    • 1
  • William G. Brazier
    • 2
  • Vincent F. Sajewski
    • 3
  1. 1.General Motors Research LaboratoriesWarren
  2. 2.Body and Electrical Product EngineeringFord Motor CompanyDearborn
  3. 3.Fisher Body DivisionGeneral Motors CorporationWarren

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