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Unconstrained springback behavior of Al-Mg-Si sheets for different sitting times

De Sousa, R. J.Alves; Correia, Joao; Simoes, Fabio; Ferreira, Jorge; Cardoso, Rui P.R.; Gracio, Jose; Barlat, Frederic

Authors

R. J.Alves De Sousa

Joao Correia

Fabio Simoes

Jorge Ferreira

Rui P.R. Cardoso

Jose Gracio

Frederic Barlat



Abstract

In this work, the springback behavior of the commercial 6022 aluminum alloy in temper aging (T4) is investigated taking into account that the sheets, prior to deformation process, are initially pre-strained and then submitted to various sitting times at room temperature. The unconstrained cylindrical bending test based on the NUMISHEET2002 proceedings as presented by Yoon et al. [Yoon JW, Pourboghrat F, Chung K, Yang DY. Springback prediction for sheet metal forming process using a 3D hybrid membrane/shell method. International Journal of Mechanical Sciences 2002;44:2133-53] is selected as validation benchmark. For finite element simulations, the geometry is modeled by solid-shell finite elements using the formulation of Alves de Sousa et al. [Alves de Sousa RJ, Yoon JW, Cardoso RPR, Fontes Valente RA, Grácio JJ. On the use of a reduced enhanced solid-shell (RESS) element for sheet forming simulations. International Journal of Plasticity 2007;23:490-515; Alves de Sousa RJ, Cardoso RPR, Fontes Valente RA, Yoon J-W, Natal Jorge RM, Grácio JJ. A new one-point quadrature enhanced assumed strain (EAS) solid-shell element with multiple integration points along thickness: Part I - Geometrically linear applications. International Journal for Numerical Methods in Engineering 2005;62:952-77; Alves de Sousa RJ, Cardoso RPR, Fontes Valente RA, Yoon JW, Grácio JJ, Natal Jorge RM. A new one-point quadrature enhanced assumed strain (EAS) solid-shell element with multiple integration points along thickness: Part II - Nonlinear applications. International Journal for Numerical Methods in Engineering 2006;67:160-88]. The material behavior is described based on the work of Correia et al. [Correia JPM, Simões F, Gracio JJ, Barlat F, Ahzi S. A simple hardening rule accounting for time-dependent behavior in Al-Mg-Si alloys. Materials Science Engineering A 2007;456:170-9]. The results of conducted experiments and numerical simulations are compared. It can be concluded about the good agreement between experiments and simulations attesting the effectiveness of the material model utilized to describe the time-dependent hardening behavior. © 2008 Elsevier Ltd. All rights reserved.

Citation

De Sousa, R. J., Correia, J., Simoes, F., Ferreira, J., Cardoso, R. P., Gracio, J., & Barlat, F. (2008). Unconstrained springback behavior of Al-Mg-Si sheets for different sitting times. International Journal of Mechanical Sciences, 50(9), 1381-1389. https://doi.org/10.1016/j.ijmecsci.2008.07.008

Journal Article Type Article
Publication Date Jan 1, 2008
Deposit Date Sep 25, 2012
Journal International Journal of Mechanical Sciences
Print ISSN 0020-7403
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 50
Issue 9
Pages 1381-1389
DOI https://doi.org/10.1016/j.ijmecsci.2008.07.008
Keywords Springback, solid-shell, enhanced assumed strain, aluminium alloys, finite element
Public URL https://uwe-repository.worktribe.com/output/1010638
Publisher URL http://dx.doi.org/10.1016/j.ijmecsci.2008.07.008




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