Study on the Effect of Anisotropy on Plastic Flow Localization of Third Generation Advanced High Strength Steel

Abstract:

The aim of this work is to analyze the effect of the anisotropy on the formability of the third generation of advanced high strength steel (3genAHSS) from experimental and theoretical point of view. The reference material is the USS CR980XG3TM️ AHSS, a 3genAHSS 980T/600Y-retained austenite bearing-high elongation steel grade. A careful experimental work on the selected 3genAHSS characterization has been performed. The anisotropy factors and the yield stresses have been identified from tensile tests at several orientations with respect to the rolling direction. The experimental forming limit diagram under linear strain paths has been determined using Nakajima tests and the Erichson test for the equibiaxial stretching, respectively. The Marciniak-Kuczynski analysis is used to simulate the onset of localized necking through an advanced sheet metal forming limit model. YLD00-2d yield condition gives the initial shape of the yield locus. Swift strain–hardening power law is used to describe the strain hardening of the material. The effect of the anisotropy on the forming limits of 3genAHSS steel is analyzed. It was achieved proper reproducibility of the experimental tendencies of anisotropic factor distribution and the yield stress as a function of the tensile loading axis by the selected constitutive equations. A good accuracy of the FLDmodel on the prediction of the experimental results is found.

• Periodical: Key Engineering Materials (Volume 926)
• Pages: 1100-1107
• DOI: https://doi.org/10.4028/p-zquocn
• Online since: July 2022
• Authors: Marilena Butuc*, Gabriela Vincze, Rafael Santos, António Pereira, Abel dos Santos, Rui Amaral
• Keywords: Anisotropy, Constitutive Equation, Formability, MK Model, Numerical Simulation, Third Generation of Advanced High Strength Steel

References

[1] M. Gensamer, Strength and ductility, Transactions of the American Society for Metals 36(1946) 30-60.

[2] D. Banabic D, A. Kami, D.S. Comsa and P. Eyckens, Developments of the Marciniak-Kuczynski model for sheet metal formability: A review, J. Mat. Proc. Tech. 287(2021) Article number 116446.

DOI: 10.1016/j.jmatprotec.2019.116446

[3] Z. Marciniak and K. Kuczyski, Limit strains in the processes of stretch-forming sheet metal, 1967 Int. J. Mech. Sciences 9(1967) 609-620.

DOI: 10.1016/0020-7403(67)90066-5

[4] F. Barlat, J.C. Brem, J.W. Yoon, K. Chung, R.E. Dick, D.J. Lege, F. Pourboghrat, S-H Choi and E. Chu, Plane stress yield function for aluminum alloy sheets. Part 1: theory, J. Plast. 19(2003) 1297-1319.

DOI: 10.1016/s0749-6419(02)00019-0

[5] M.C. Butuc, C. Teodosiu, F. Barlat, J.J. Grácio, Analysis of sheet metal formability through isotropic and kinematic hardening models, European Journal of Mechanics /A Solids 30(2011) 532–546.

DOI: 10.1016/j.euromechsol.2011.03.005

[6] Z. Marciniak, Analysis of necking preceding fracture of sheet metal under tension, Met Ital. 60(1968) 701-709.

[7] M.C. Butuc, A. Barata da Rocha, J.J. Gracio, A theoretical study on Forming Limit Diagrams Prediction, J. Mat. Proc. Tech. 142 (2003) 714-724.

DOI: 10.1016/s0924-0136(03)00813-6

[8] J. Woodthorpe and R. Pearce, The anomalous behaviour of aluminium sheet under balanced biaxial tension, Int. J. Mech. Sci. 12(1970) 341-347.

DOI: 10.1016/0020-7403(70)90087-1

[9] Z. Marciniak, J.L. Duncan, S.J. Hu, Mechanics of sheet metal forming, Publisher, Oxford, Boston, Butterworth-Heinemann, (2002).

[10] M.C. Butuc, F. Barlat and G. Vincze, The formability of twinning—Induced plasticity steels predicted on the base of Marciniak-Kuczynski theory, J. Mat. Proc. Tech. 287(2021) Article number 116496.

DOI: 10.1016/j.jmatprotec.2019.116496