TY - JOUR

T1 - A new approach for user-independent determination of formability of a steel sheet sheared edge

AU - Schneider, Matthias

AU - Peshekhodov, Ilya

AU - Bouguecha, Anas

AU - Behrens, Bernd Arno

N1 - 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.

PY - 2016/6

Y1 - 2016/6

N2 - 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.

AB - 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.

KW - Edge-crack

KW - Formability

KW - Hole expansion

KW - Numerical simulation

KW - Sheared edge

KW - Steel

UR - http://www.scopus.com/inward/record.url?scp=84966354968&partnerID=8YFLogxK

U2 - 10.1007/s11740-016-0677-4

DO - 10.1007/s11740-016-0677-4

M3 - Article

AN - SCOPUS:84966354968

VL - 10

SP - 241

EP - 252

JO - Production Engineering

JF - Production Engineering

SN - 0944-6524

IS - 3

ER -