A physically-based mixed hardening model for the prediction of the ductility limits of thin metal sheets using a CPFE approach
Article dans une revue avec comité de lecture
Date
2024-03-21Journal
International Journal of PlasticityAbstract
An advanced Crystal Plasticity Finite Element (CPFE) approach is developed to accurately predict the ductility limit strains of thin metal sheets. This method uses polycrystalline unit cells to represent the metal sheets at the macroscopic level. The macroscopic behavior of these unit cells is determined based on that of the constituent single crystals using the periodic
homogenization multiscale scheme. At the single crystal scale, the constitutive framework follows a finite strain rate-independent formulation, with the flow rule governed by the Schmid law. The evolution of the single crystal yield surface is described through a physically based mixed hardening model, where isotropic hardening is characterized by a dislocation density-based formulation, while kinematic hardening is described by the nonlinear Armstrong–Frederick model. The unit cell ductility limit strains are predicted by the Rice bifurcation criterion. The reliability of the mixed hardening model in accurately reproducing mechanical behavior is confirmed through simulations of uniaxial tension/compression loading. Then, the developed computational strategy is used to investigate the impact of key microstructural hardening parameters on the initiation of localized necking under linear strain paths. The numerical predictions reveal the significant influence of these parameters on the formability of thin metal sheets. Additionally, the analysis of ductility limits under non-linear strain paths demonstrates a strong dependency of the numerical predictions on strain path changes. The numerical predictions obtained by the developed CPFE multiscale strategy are compared with experimental results from the literature. In summary, the proposed approach provides a reliable tool for accurately predicting the ductility limits of thin metal sheets, offering valuable insights for engineering applications.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Ductility limit prediction for polycrystalline aggregates using a CPFEM-based multiscale framework Article dans une revue avec comité de lectureThe ductility of polycrystalline aggregates is usually limited by two main phenomena: plastic strain localization and void coalescence. The goal of this contribution is to develop a new multiscale framework, based on the ...
-
Article dans une revue avec comité de lectureThe current contribution investigates the effect of some relevant microstructural parameters (specifically, morphological and crystallographic textures) on the ductility limits of polycrystalline aggregates using the Crystal ...
-
Chapitre d'ouvrage scientifiqueJEDIDI, Mohamed Yassine; BEN BETTAIEB, Mohamed; BOUGUECHA, Anas; ABED-MERAIM, Farid ; KHABOU, Mohamed Taoufik; HADDAR, Mohamed (Springer International Publishing, 2019)In many engineering applications (automotive, computer and mobile device industries, etc.), magnesium alloys have been widely used owing to their interesting physical and mechanical parameters. However, magnesium alloys ...
-
Article dans une revue avec comité de lectureJEDIDI, Mohamed Yassine; BEN BETTAIEB, Mohamed; ABED-MERAIM, Farid ; KHABOU, Mohamed Taoufik; BOUGUECHA, Anas; HADDAR, Mohamed (Elsevier, 2020)In the present contribution, a two-surface plasticity model is coupled with several diffuse and localized necking criteria to predict the ductility limits of hexagonal closed packed sheet metals. The plastic strain is ...
-
An Anisotropic Model with Linear Perturbation Technique to Predict HCP Sheet Metal Ductility Limit Chapitre d'ouvrage scientifiqueJEDIDI, Mohamed Yassine; BEN BETTAIEB, Mohamed; ABED-MERAIM, Farid ; KHABOU, Mohamed Taoufik; BOUGUECHA, Anas; HADDAR, Mohamed (Springer International Publishing, 2022)In this paper, hexagonal closed packed (HCP) sheet metal ductility for a viscoplastic material is analyzed by using a linear perturbation technique. It can be used for the analysis of local-ized necking. This technique is ...