Effect of Thickness Stress in Stretch-Bending

Antonius H. van den Boogaard, W.C. Emmens, Han Huetink

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)

Abstract

In any situation where a strip is pulled over a curved tool, locally a contact stress acts on the strip in thickness direction. This contact stress changes the stress state in the material, which will influence the deformation. One effect is that the yield stress in the plane of the strip is reduced. Predictions by a simple model agree with observation from a 90-degree bending test found in literature, and indirectly with observation from a stretch-bend test found in literature. The change in stress state also affects the formability. This is analyzed by applying the maximum force condition on this situation. The predictions agree with a more thorough analysis of the effect of thickness stress in general, but the predictions of both methods are lower than actually observed in tests.
Original languageUndefined
Title of host publicationNumiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes
EditorsF Barlat, Y.H. Moon, M.G. Lee
Place of PublicationPohang
PublisherAIP
Pages504-511
ISBN (Print)978-0-7354-0799-2
Publication statusPublished - 13 Jun 2010
Event10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010 - Pohang, Korea, Republic of
Duration: 13 Jun 201017 Jun 2010
Conference number: 10

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics
Volume1252
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010
Abbreviated titleNUMIFORM
CountryKorea, Republic of
CityPohang
Period13/06/1017/06/10

Keywords

  • METIS-266994
  • IR-71871

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