A new approach for user-independent determination of formability of a steel sheet sheared edge

authored by: Matthias Schneider, Ilya Peshekhodov, Anas Bouguecha, Bernd Arno Behrens
Abstract: It is common to use a forming limit curve (FLC) for a feasibility study of a deep-drawn steel part based on a finite element analysis (FEA). However, in such an approach a neglected fact is that a blank edge in industrial production is often produced by shear cutting. Especially, for many high strength steel grades, this cutting process notably reduces edge formability. An overestimation of formability of the blank edge, with an FLC, is the consequence that may lead to cracks at the sheared edge of a part. The following paper describes a new approach to determine formability of a sheet-steel sheared edge by hole expansion test that uses an FLC tool set. This approach delivers a hole expansion ratio with considerably lower scattering compared to the hole expansion according to ISO 16630. Additionally, information on the planar isotropy, flow and necking behavior of the material, is supplied. Finally, a pragmatical way of transferring test results into an FEA of the forming process for a sheet blank with a sheared edge is presented.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Salzgitter Mannesmann Forschung GmbH
Type: Article
Journal: Production Engineering
Volume: 10
Pages: 241-252
No. of pages: 12
ISSN: 0944-6524
Publication date: 06.2016
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanical Engineering, Industrial and Manufacturing Engineering
Electronic version(s): https://doi.org/10.1007/s11740-016-0677-4 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{6ecc3545a9d54b5a938a9bafed395731,
title = "A new approach for user-independent determination of formability of a steel sheet sheared edge",
abstract = "It is common to use a forming limit curve (FLC) for a feasibility study of a deep-drawn steel part based on a finite element analysis (FEA). However, in such an approach a neglected fact is that a blank edge in industrial production is often produced by shear cutting. Especially, for many high strength steel grades, this cutting process notably reduces edge formability. An overestimation of formability of the blank edge, with an FLC, is the consequence that may lead to cracks at the sheared edge of a part. The following paper describes a new approach to determine formability of a sheet-steel sheared edge by hole expansion test that uses an FLC tool set. This approach delivers a hole expansion ratio with considerably lower scattering compared to the hole expansion according to ISO 16630. Additionally, information on the planar isotropy, flow and necking behavior of the material, is supplied. Finally, a pragmatical way of transferring test results into an FEA of the forming process for a sheet blank with a sheared edge is presented.",
keywords = "Edge-crack, Formability, Hole expansion, Numerical simulation, Sheared edge, Steel",
author = "Matthias Schneider and Ilya Peshekhodov and Anas Bouguecha and Behrens, {Bernd Arno}",
note = "Funding Information: The research Project P 830/01/2010/S24/10170/09 {"}Investigation of damage and formability of the sheared edge of dual-phase steels with the help of the multiscale finite element analysis{"} has been carried out at the Institute of Forming Technology and Machines of the Leibniz Universit?t Hannover and the Salzgitter Mannesmann Forschung GmbH. FOSTA has accompanied the research work and has organized the project funding from the Foundation for Steel Application Research. The authors also thank B. Acun, M. Baeck and J. Parschukow for helping to build up SZMF-ARAMIS -macro and SZMF-EXCEL -macro for HET -NAK postprocessing in framework of their student thesis and H. Friebe, T. M?ller and C. Blumenthal from GOM mbH for their work on usability of GOM-ARAMIS -macro.",
year = "2016",
month = jun,
doi = "10.1007/s11740-016-0677-4",
language = "English",
volume = "10",
pages = "241--252",
journal = "Production Engineering",
issn = "0944-6524",
publisher = "Springer Verlag",
number = "3",
}