Shear banding from lattice kinetic models with competing interactions

Benzi, Roberto; Sbragaglia, Mauro; Bernaschi, Massimo; Succi, Sauro

doi:10.1098/rsta.2011.0058

Cited by 1 publication

(1 citation statement)

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“…Certainly, a study of the phenomena of strain localization is crucial in developing a predictive capability for the analysis of nucleation of instability in the microstructure and material failure. Some attempts at modelling strain localization and shear band phenomenon were reported in the literature [13][14][15][16][17]. Constitutive isotropic material description, employing a modified form of a Johnson-Cook model, is popularly used in such simulations [13,14], which do not account for the underlying anisotropy related to the crystal orientation.…”

Section: Introductionmentioning

confidence: 99%

Modelling strain localization in Ti–6Al–4V at high loading rate: a phenomenological approach

Zhou

Pang

Bisht

et al. 2019

Phil. Trans. R. Soc. A.

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A phenomenological approach, based on a combination of a damage mechanism and a crystal plasticity model, is proposed to model a process of strain localization in Ti–6AI–4V at a high strain rate of 10 3 s −1 . The proposed model is first calibrated employing a three-dimensional representative volume element model. The calibrated parameters are then employed to investigate the process of onset of strain localization in the studied material. A suitable mesh size is chosen for the proposed model by implementing a mesh-sensitivity study. The influence of boundary conditions on the initiation of the strain localization is also studied. A variation of crystallographic orientation in the studied material after the deformation process is characterized, based on results for different boundary conditions. The study reveals that the boundary conditions significantly influence the formation of shear bands as well as the variation of crystallographic orientation in the studied material. Results also indicate that the onset of strain localization can affect considerably the material's behaviour. This article is part of the theme issue ‘Modelling of dynamic phenomena and localization in structured media (part 2)’.

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