Paper Title:
Damage-Based Finite Element Modeling of Stretch Flange Forming of Aluminium-Magnesium Alloy
  Abstract

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, M. J. Worswick, D. J. Lloyd, "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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$32.00
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