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Published in: International Journal of Material Forming 1/2017

04-09-2015 | Original Research

Numerical and experimental analysis of wrinkling during the cup drawing of an AA5042 aluminium alloy

Authors: D. M. Neto, M. C. Oliveira, R. E. Dick, P. D. Barros, J. L. Alves, L. F. Menezes

Published in: International Journal of Material Forming | Issue 1/2017

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Abstract

The recent trend to reduce the thickness of metallic sheets used in forming processes strongly increases the likelihood of the occurrence of wrinkling. Thus, in order to obtain defect-free components, the prediction of this kind of defect becomes extremely important in the tool design and selection of process parameters. In this study, the sheet metal forming process proposed as a benchmark in the Numisheet 2014 conference is selected to analyse the influence of the tool geometry on wrinkling behaviour, as well as the reliability of the developed numerical model. The side-wall wrinkling during the deep drawing process of a cylindrical cup in AA5042 aluminium alloy is investigated through finite element simulation and experimental measurements. The material plastic anisotropy is modelled with an advanced yield criterion beyond the isotropic (von Mises) material behaviour. The results show that the shape of the wrinkles predicted by the numerical model is strongly affected by the finite element mesh used in the blank discretization. The accurate modelling of the plastic anisotropy of the aluminium alloy yields numerical results that are in good agreement with the experiments, particularly the shape and location of the wrinkles. The predicted punch force evolution is strongly influenced by the friction coefficient used in the model. Moreover, the two punch geometries provide drawn cups with different wrinkle waves, mainly differing in amplitude.

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Metadata
Title
Numerical and experimental analysis of wrinkling during the cup drawing of an AA5042 aluminium alloy
Authors
D. M. Neto
M. C. Oliveira
R. E. Dick
P. D. Barros
J. L. Alves
L. F. Menezes
Publication date
04-09-2015
Publisher
Springer Paris
Published in
International Journal of Material Forming / Issue 1/2017
Print ISSN: 1960-6206
Electronic ISSN: 1960-6214
DOI
https://doi.org/10.1007/s12289-015-1265-4

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