Cold Formability of Automotive Sheet Metals: Anisotropy, Localization, Damage and Ductile Fracture

Jun He Lian; Deok Chan Ahn; Dong Chul Chae; Sebastian Münstermann; Wolfgang Bleck

doi:10.4028/www.scientific.net/KEM.639.353

Paper Titles

Structural and Frictional Performance of Fused Deposition Modelled Acrylonitrile Butadiene Styrene (P430) with a View to Use as Rapid Tooling Material in Sheet Metal Forming
p.325

A New Approach to the Evaluation of Forming Limits in Sheet Metal Forming
p.333

Analysis of Tensile Test of Titanium EBW Sheet
p.339

Effect of Pre-Compressive Strain on Work-Hardening Behavior upon Two-Step Loading in a Magnesium Alloy Sheet
p.347

Cold Formability of Automotive Sheet Metals: Anisotropy, Localization, Damage and Ductile Fracture
p.353

Investigation on the Strain Behaviour of a Precipitation-Hardenable Aluminium Alloy through a Temperature Gradient Based Heat Treatment
p.361

Identification of Plasticity Model Parameters of the Heat-Affected Zone in Resistance Spot Welded Martensitic Boron Steel
p.369

Influence of Stress Relaxation after Uniaxial Pre-Straining on Subsequent Plastic Yielding in the Uniaxial Tensile Test of Sheet Metal
p.377

Validation of Kinematic Hardening Parameters from Different Stress States and Levels of Plastic Strain with the Use of the Cyclic Bending Test
p.385

HomeKey Engineering MaterialsKey Engineering Materials Vol. 639Cold Formability of Automotive Sheet Metals:...

Cold Formability of Automotive Sheet Metals: Anisotropy, Localization, Damage and Ductile Fracture

Abstract:

Experimental and numerical investigations on the characterization and prediction of cold formability of two different types of automotive steel sheets, a ferritic stainless steel sheet (AISI 439) and a dual-phase steel sheet (DP600) are performed in this study. Due to the different microstructure configurations, these two steels show significant differences in plasticity behavior as well as failure mechanisms. The ferritic stainless steel shows strong anisotropic plastic deformation in terms of both yielding and hardening, whereas the dual-phase steel behaves quite isotropic resulting from the mixture of two phases. However, unlike the localization dominant failure mechanism of the ferritic stainless steel, the incompatible deformation due to the distinctions of the mechanical properties of two phases naturally results in early damage and extensive damage development prior to localization, or ductile fracture without localization. In this study, all these features are taken into account for an accurate prediction of formability. A general modelling framework with specifications for these separate features is formulated and applied to the two steels.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 639)

Pages:

353-360

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.639.353

Citation:

Cite this paper

Online since:

March 2015

Authors:

Jun He Lian*, Deok Chan Ahn, Dong Chul Chae, Sebastian Münstermann, Wolfgang Bleck

Keywords:

Damage, Fracture, Metal Forming

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] J. Lian, M. Sharaf, F. Archie and S. Münstermann, A Hybrid Approach for Modelling of Plasticity and Failure Behaviour of Advanced High-Strength Steel Sheets, Int. J. Damage Mech. 22 (2013) 188-218.

DOI: 10.1177/1056789512439319

Google Scholar

[2] S.P. Keeler, A Valuable Aid for Evaluation Sheet Forming, Sheet Metal Industries 45 (1969) 633-640.

Google Scholar

[3] G.M. Goodwin, Application of Strain Analysis to Sheet Metal Forming Problems, La Metallurgica 60 (1968) 767-771.

Google Scholar

[4] W. Bleck, Z. Deng, K. Papamantellos and C.O. Gusek, A Comparative Study of the Forming-Limit Diagram Models for Sheet Steels, J. Mater. Process. Technol. 83 (1998) 223-230.

DOI: 10.1016/s0924-0136(98)00066-1

Google Scholar

[5] H.W. Swift, Plastic Instability under Plane Stress, J. Mech. Phys. Solids 1 (1952) 1-18.

Google Scholar

[6] R. Hill, On Discontinuous Plastic States, with Special Reference to Localized Necking in Thin Sheets, J. Mech. Phys. Solids 1 (1952) 19-30.

DOI: 10.1016/0022-5096(52)90003-3

Google Scholar

[7] P. Hora, L. Tong and J. Reissner A Prediction Method for Ductile Sheet Metal Failure. In: J.K. Lee, G.L. Kinzel, R.H. Wagoner (eds) NUMISHEET 1996, Dearborn, 1996. pp.252-256.

Google Scholar

[8] J. Lian, P. Liu and S. Münstermann, Modeling of Damage and Failure of Dual Phase Steel in Nakajima Test, Key Eng. Mater. 525-526 (2012) 69-72.

DOI: 10.4028/www.scientific.net/kem.525-526.69

Google Scholar