Damage-Based Finite Element Modeling of Stretch Flange Forming of Aluminium-Magnesium Alloy

Abstract:

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The numerical simulation of the stretch flange forming operation of Al-Mg sheet AA5182 was conducted with an explicit finite element code, LS-DYNA. A Gurson-Tvergaard- Needleman (GTN)-based material model was used in the finite element calculation. A strain controlled void nucleation rule was adopted with void nucleating particle fraction measured directly from the as-received Al-Mg sheet. Parametric study was performed to examine the effect of void nucleation strain on the predicted onset of ductile fracture. Critical porosity levels determined through quantitative metallurgical analysis were adopted to predict the commencement of void coalescence in the GTN model. The numerical results were compared to the experimental ones and an applicable void nucleation strain was suggested.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

815-820

DOI:

10.4028/www.scientific.net/MSF.519-521.815

Citation:

Z. T. Chen et al., "Damage-Based Finite Element Modeling of Stretch Flange Forming of Aluminium-Magnesium Alloy", Materials Science Forum, Vols. 519-521, pp. 815-820, 2006

Online since:

July 2006

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Price:

$35.00

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