Fundamentals of Bending AA6xxx Sheet

Laurent Mattei; Helmut Klocker; Dominique Daniel; Gilles Guiglionda; Julian Driver

doi:10.4028/www.scientific.net/MSF.794-796.547

Paper Titles

Influence of Temperature and Strain Rate on the Mechanical Behaviour of Aluminium Alloy AA6060
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A Super-Ductile Alloy for the Diecasting of Aluminium Automotive Body Structural Components
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Mechanical Behaviour of an AA6082 Aluminium Alloy at Low Temperatures
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Tensile Properties of 7075 Aluminum Alloys Subjected to Pre-Fatigue in Humid Environment
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Fundamentals of Bending AA6xxx Sheet
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Crystal-Plasticity Simulation of the Evolution of the Matt Surface in Pack Rolling of Aluminium Foil
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Modeling of Bending and Bend-Stretching of Laminated Aluminum Sheets
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Slip System Interaction Matrix and its Influence on the Macroscopic Response of Al Alloys
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Effect of Aging Precipitates on the Bendability of an Al-Mg-Si Alloy
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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Fundamentals of Bending AA6xxx Sheet

Fundamentals of Bending AA6xxx Sheet

Abstract:

This paper describes recent experimental results on the strain distributions developed during bending of AA6xxx sheet for automotive applications, together with a new model for the mechanics and metallurgy of strain localization during bending. A detailed microscopic study (optical and SEM/EBSD) shows that damage development during bending to strains of order unity is controlled by through-thickness shear banding at the grain scale. A new finite element microstructure-based model is introduced to predict this strain localization during practical bending. The sheet metal is modelled as a grain aggregate, each grain having its own flow stress. After validation, the model is applied to the experimental results through an analysis of the critical plastic strain at the outer surface during bending of AA6016 sheet alloys. It correctly describes the respective influences of sheet thickness, grain size and shape, and work hardening. In particular the model brings out the primary importance of large-strain hardening and the spread of the flow stress distribution.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

547-552

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.547

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Online since:

June 2014

Authors:

Laurent Mattei, Helmut Klocker, Dominique Daniel, Gilles Guiglionda, Julian Driver*

Keywords:

Aluminum (Al), Bending, Damage, Modeling, Shear Band

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* - Corresponding Author

References

[1] D.J. Lloyd, A.K. Gupta, in: T. Chandra, T. Sakai (Eds. ), Thermec'97, TMS, (1997) 99-107.

Google Scholar

[2] W.S. Miller, 1. Zhuang, J. Bottema, AJ. Wittebrood, P. De Smet, A. Haszler and A Vieregge, Mater. Sci. Eng. A2S0 (2000) 37-49.

DOI: 10.1016/s0921-5093(99)00653-x

Google Scholar

[3] N. Triantafyllidis, A. Needleman, Int. J. Solids Structures 18, 2 (1982) 121-138.

Google Scholar

[4] M. Kuroda, V. Tvergaard, J. Mech. Phys. Solids 49 (2001) 1239-1263.

Google Scholar

[5] L. Mattei, D. Daniel, G. Guiglionda, H. Klöcker, in J. Hirsch, B. Skrotzki, G. Gottstein (Ed. ), ICAA 11, Aluminium Alloys, Their Physical and Mechanical Properties, 2008, pp.1829-1835.

Google Scholar

[6] A. Bacha, M. Feuerstein, Ch. Desrayaud, H. Klöcker, J. Eval. Test. 35 (2007) 157-166.

Google Scholar

[7] L. Mattei, D. Daniel, G. Guiglionda, H. Klöcker, J. Driver, Mater. Sci. Eng., A559 (2013) 812–821.

Google Scholar

[8] L. Mattei, D. Daniel, G. Guiglionda, N. Moulin, H. Klöcker, J. Driver , Mater. Sci. Eng., A583 (2013) 96-104.

Google Scholar