Abstract
Automotive stampings undergo complex strain paths during drawing, stretching, and bending operations which develop large plastic strain gradients within the material. Aluminum sheet alloys are increasingly used for vehicle structure lightweighting, but limited formability and high levels of springback present challenges to the manufacturing and assembly processes. The current work explores the springback levels in AA6016-T4 sheet after pure bending operations. Finite element modeling is performed using both isotropic and elasto-plastic self-consistent (EPSC) crystal plasticity approaches. The EPSC model incorporates backstresses informed by GND content, as measured via high-resolution EBSD. Its predictions are shown to be more accurate than those of the isotropic model. The benefits and limitations of the current EPSC model are discussed.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Eggertsen, P.A. and K. Mattiasson, On the modelling of the bending–unbending behaviour for accurate springback predictions. International Journal of Mechanical Sciences, 2009. 51(7): p. 547–563.
Gau, J.-T. and G.L. Kinzel, A new model for springback prediction in which the Bauschinger effect is considered. International Journal of Mechanical Sciences, 2001. 43(8): p. 1813–1832.
Papeleux, L. and J.-P. Ponthot, Finite element simulation of springback in sheet metal forming. Journal of Materials Processing Technology, 2002. 125-126: p. 785–791.
Zecevic, M. and M. Knezevic, A dislocation density based elasto-plastic self-consistent model for the prediction of cyclic deformation: Application to AA6022-T4. International Journal of Plasticity, 2015. 72: p. 200–217.
Zecevic, M. and M. Knezevic, Latent hardening within the elasto-plastic self-consistent polycrystal homogenization to enable the prediction of anisotropy of AA6022-T4 sheets. International Journal of Plasticity, 2018. 105: p. 141–163.
Zecevic, M. and M. Knezevic, An implicit formulation of the elasto-plastic self-consistent polycrystal plasticity model and its implementation in implicit finite elements. Mechanics of Materials, 2019. 136: p. 103065.
Zecevic, M., et al., Dual-phase steel sheets under cyclic tension–compression to large strains: experiments and crystal plasticity modeling. Journal of the Mechanics and Physics of Solids, 2016. 96: p. 65–87.
Cantara, A.M., et al., Predicting elastic anisotropy of dual-phase steels based on crystal mechanics and microstructure. International Journal of Mechanical Sciences, 2019. 151: p. 639–649.
Sharma, R.S., Dane; Darujo, Sowmya; Knevevic, Marko; Miles, Michael; Fullwood, David;, Multi-strain path deformation behavior of AA6016-T4: Experiments and crystal plasticitymodeling. International Journal of Solids and Structures, 2021.
Benson, S. Bending Basics: The hows and whys of springback and springforward. [Article] 2014 July 9, 2014 [cited 2021 7/8/2021]; Available from: https://www.thefabricator.com/thefabricator/article/bending/bending-basics-the-hows-and-whys-of-springback-and-springforward.
Bakhshivash, S., et al., Effect of Bending Angle and Punch Tip Radius on Spring-Forward in an Al-Mg-Si Alloy. 2016.
Zecevic, M., I.J. Beyerlein, and M. Knezevic, Coupling elasto-plastic self-consistent crystal plasticity and implicit finite elements: applications to compression, cyclic tension-compression, and bending to large strains. International Journal of Plasticity, 2017. 93: p. 187–211.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2022 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Sargeant, D., Zahidul, M., Sharma, R., Kenezevic, M., Fullwood, D.T., Miles, M.P. (2022). Modeling of Springback Behavior in AA6016-T4 Sheet via an Elastoplastic Self-consistent Model Incorporating Backstress. In: Eskin, D. (eds) Light Metals 2022. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92529-1_37
Download citation
DOI: https://doi.org/10.1007/978-3-030-92529-1_37
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-92528-4
Online ISBN: 978-3-030-92529-1
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)