Numerical and experimental determination of cut-edge after blanking of thin steel sheet of DP1000 within use of stress based damage model

verfasst von: Bernd Arno Behrens, Anas Bouguecha, Milan Vucetic, Richard Krimm, Tobias Hasselbusch, Christian Bonk
Abstract: The proposed study focuses on blanking of thin steel sheets of Dogal1000DP +Z100MBO. Numerical and experimental investigations of the influence of clearance and punch speed on the cutting force and the geometry of the sheared edge were done. Tensile and stack compression test at elevated temperatures has been chosen to determine the flow and fracture behavior of Dogal1000DP +Z100MBO at different stress states. It is shown that the flow curve determined by stack compression test leads to better results in force - displacement prediction of a blanking process compared to determination of flow curve by tensile test. Stress based fracture criterion were chosen to describe damage behaviour. Moreover significant influence of fracture locus for negative stress triaxialities on the geometry of the numerically predicted sheared edge is shown.
Organisationseinheit(en): Institut für Umformtechnik und Umformmaschinen
Typ: Konferenzaufsatz in Fachzeitschrift
Journal: Procedia Engineering
Band: 81
Seiten: 1096-1101
Anzahl der Seiten: 6
ISSN: 1877-7058
Publikationsdatum: 15.10.2014
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemeiner Maschinenbau
Elektronische Version(en): https://doi.org/10.1016/j.proeng.2014.10.200 (Zugang: Offen)
: Details im Forschungsportal „Research@Leibniz University“

BibTeX

@article{ce234c74b0ca4b1694e54900929cac5a,
title = "Numerical and experimental determination of cut-edge after blanking of thin steel sheet of DP1000 within use of stress based damage model",
abstract = "The proposed study focuses on blanking of thin steel sheets of Dogal1000DP +Z100MBO. Numerical and experimental investigations of the influence of clearance and punch speed on the cutting force and the geometry of the sheared edge were done. Tensile and stack compression test at elevated temperatures has been chosen to determine the flow and fracture behavior of Dogal1000DP +Z100MBO at different stress states. It is shown that the flow curve determined by stack compression test leads to better results in force - displacement prediction of a blanking process compared to determination of flow curve by tensile test. Stress based fracture criterion were chosen to describe damage behaviour. Moreover significant influence of fracture locus for negative stress triaxialities on the geometry of the numerically predicted sheared edge is shown.",
keywords = "Blanking, Damage, Dual phase steel, FE-simulation, Stack-compression test, Tensile test",
author = "Behrens, {Bernd Arno} and Anas Bouguecha and Milan Vucetic and Richard Krimm and Tobias Hasselbusch and Christian Bonk",
note = "Funding information: Though it was shown, that force versus time can be accurately predicted with the flow curve determined by a stack compression test. If only a tensile test is available Ludwig extrapolation brings insufficiently accurate results and another extrapolation should be used to handle high plastic strains. The modification of the fracture locus for negative stress triaxialities leads to some improvement of the determined sheared edge. Moreover, experiments show that velocity of punch does not influence the punching force. One possible explanation could be that the temperature increase in shearing zone leads to significant increase of yield stress and quasi adiabatic conditions. In the future further investigations should be carried out to determine real temperature field in shearing zone. The authors thank the DFG (German Research Foundation) for the financial support of the project “Experimentelle Analyse und Entwicklung eines Finite Elemente Modells zur verbesserten numerischen Abbildung des Scherschneidprozesses” (BE-1691/133-1).; 11th International Conference on Technology of Plasticity, ICTP 2014 ; Conference date: 19-10-2014 Through 24-10-2014",
year = "2014",
month = oct,
day = "15",
doi = "10.1016/j.proeng.2014.10.200",
language = "English",
volume = "81",
pages = "1096--1101",
journal = "Procedia Engineering",
issn = "1877-7058",
publisher = "Elsevier BV",
}