Zhou, R and Pang, KH and Bisht, A and Roy, A and Suwas, S and Silberschmidt, VV (2020) Modelling strain localization in Ti–6Al–4V at high loading rate: A phenomenological approach. In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378 (2162).
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Abstract
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 103 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)’
| Item Type: | Journal Article |
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| Publication: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| Publisher: | Royal Society Publishing |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Boundary conditions; Finite element method; Mesh generation; Plasticity, Crystal plasticity; Crystal plasticity models; Crystallographic orientations; Different boundary condition; Localization; Phenomenological approach; Representative volume element (RVE); Strain localizations, Strain rate |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 23 Jan 2023 05:40 |
| Last Modified: | 23 Jan 2023 05:40 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79240 |
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