Curvature Based Forming Limit Prediction of High-Strength Steel Components with Superimposed Stretching and Bending in the Deep Drawing Process

Daniela Schalk-Kitting; Wolfgang Weiß; Bettina Suhr; Michael Koplenig

doi:10.4028/www.scientific.net/KEM.651-653.181

Paper Titles

Research of Dynamic Recrystallization Processes in Heat-Resistant Ni-Based Alloy
p.156

Anisotropic Behavior in Plasticity and Ductile Fracture of an Aluminum Alloy
p.163

A Comparative Study of the Identification Methods for Tube Hydroforming Process
p.169

Deformation Characteristics of Advanced High Strength Steel under Cyclic Bending and Reversed Bending
p.175

Curvature Based Forming Limit Prediction of High-Strength Steel Components with Superimposed Stretching and Bending in the Deep Drawing Process
p.181

Lode Parameter Dependence and Quasi-Unilateral Effects in Continuum Damage Mechanics: Models and Applications in Metal Forming
p.187

Forming Limit Diagram Predictions Using a Self-Consistent Crystal Plasticity Model: A Parametric Study
p.193

Room Temperature Forming of AA7075 Aluminum Alloys: W-Temper Process
p.199

Numerical Modeling of Thermal Evolution in Hot Strip Rolling of Magnesium Alloy
p.207

HomeKey Engineering MaterialsKey Engineering Materials Vols. 651-653Curvature Based Forming Limit Prediction of...

Curvature Based Forming Limit Prediction of High-Strength Steel Components with Superimposed Stretching and Bending in the Deep Drawing Process

Abstract:

The state of deformation in deep drawing operations is characterized by superimposed stretching and bending (i.e. stretch-bending). Bending effects, especially for Advanced High Strength Steels (AHSS) are known to influence the material formability. Traditional formability measures such as the Forming Limit Curve (FLC) fail to reliably predict stretch-bending formability. Consequently, to ensure an efficient and economical use of AHSS in the industrial application, current research work is focusing on the reliable numerical prediction of stretch-bending formability of AHSS sheets.Within this work, a phenomenological concept to predict the forming limit (e.g. the onset of necking) in deep drawing processes taking bending effects into account is presented. The proposed concept is based on curvature-dependent (i.e. regarding the principle curvatures κ₁ and κ₂ of the stretch-bend (convex) sheet surface) forming limit surfaces representing the probability of failure and is calibrated with experimental results from stretch-bending tests and conventional forming test such as a Nakazima test. The results of the phenomenological forming limit criterion are promising and show a more accurate prediction of the drawing depth at failure than the conventional FLC approach. The method contributes also to a probabilistic view on the forming limit of deep drawing parts.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 651-653)

Pages:

181-186

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.651-653.181

Citation:

Cite this paper

Online since:

July 2015

Authors:

Daniela Schalk-Kitting*, Wolfgang Weiß, Bettina Suhr, Michael Koplenig

Keywords:

Advanced High Strength Steels, AHSS, Deep Drawing, Formability, Stretch-Bending

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] D. Kitting, A. Ofenheimer, H. Pauli, E.T. Till: Experimental Characterization of Stretch-Bending Formability of AHSS Sheet, American Institute of Physics (AIP) Conference Proceedings 1353, Belfast, Ireland; G. Menary (Ed. ), (2011), 1589-1594.

DOI: 10.1063/1.3589743

Google Scholar

[2] D. Kitting, A. Ofenheimer, M Jain, H. Pauli and G. Rabler: Experimental characterisation of failure of stretch-bend steel sheets in Numisheet 2008, Conference Proceedings, Part A (2008) 315-320.

Google Scholar

[3] E.H. Atzema, E. Fictorie, A.H. van den Boogaard, J.M.M. Droog: The influence of curvature on FLC's of mild steel, (A)HSS and aluminium, Proceedings of IDDRG 2010, Graz, Austria; R. Kolleck (Ed. ), (2010), 519-528.

Google Scholar

[4] D. Kitting, A. Ofenheimer, H. Pauli, E.T. Till: Experimental Characterization of Stretch-Bending Formability of AHSS Sheet, AIP conference Proceedings 1353, Belfast, Ireland (2011), pp.1589-1594.

DOI: 10.1063/1.3589743

Google Scholar

[5] W. Weiss et al.: Enhanced formability assessment of AHSS sheets, (ENFASS – Rearch Fund for Coal and Steel) –RFSR-CT-2011-00020 – Report, (2015) – to be published.

Google Scholar

[6] ISO Standard ISO/DIS 12004-2: Metallic materials - Sheet and strip - Determination of forming-limit curves - Part 2: Determination of forming-limit curves in the laboratory.

DOI: 10.3403/30150423u

Google Scholar

[7] D. Kitting, A. Ofenheimer, H. Pauli, E.T. Till: Forming Limits of Stretch-Bent Steel Sheets, IDDRG 2009 (Golden (CO), USA), Conference Proceedings, pp.425-435 (2009).

DOI: 10.1007/s12289-009-0483-z

Google Scholar