Modeling of Sheet Metal Forming Based on Implicit Embedding of the Elasto-Plastic Self-Consistent Formulation in Shell Elements: Application to Cup Drawing of AA6022-T4

This article is concerned with multilevel simulations in sheet metal forming using a physically based polycrystalline homogenization model that takes into account microstructure and the directionality of deformation mechanisms acting at single-crystal level. The polycrystalline-level model is based...

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Bibliographic Details
Published in:JOM (1989) 2017-05, Vol.69 (5), p.922-929
Main Authors: Zecevic, Milovan, Knezevic, Marko
Format: Article
Language:English
Subjects:
Aluminum base alloys
Chemistry/Food Science
Computer simulation
Deformation
Earth Sciences
Engineering
Environment
Forming
Homogenization
Homogenizing
Mathematical analysis
Mathematical models
Metal forming
Multilevel
Physics
Sheet metal
Simulation
Yield stress
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Summary:This article is concerned with multilevel simulations in sheet metal forming using a physically based polycrystalline homogenization model that takes into account microstructure and the directionality of deformation mechanisms acting at single-crystal level. The polycrystalline-level model is based on the elasto-plastic self-consistent (EPSC) homogenization of single-crystal behavior providing a constitutive response at each material point, within a boundary value problem solved using shell elements at the macro-level. A recently derived consistent tangent stiffness is adapted here to facilitate the coupling between EPSC and the implicit shell elements. The underlining EPSC model integrates a hardening law based on dislocation density, which is calibrated to predict anisotropic hardening, linear and nonlinear unloading, and the Bauschinger effect on the load reversal for AA6022-T4. To illustrate the potential of the coupled multilevel finite element elasto-plastic self-consistent (FE-EPSC) model, a simulation of cup drawing from an AA6022-T4 sheet is performed. Results and details of the approach are described in this article.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-017-2255-4