A phenomenological approach based on a combination of a damage mechanism and a crystal plasticity model is proposed to model a process of stain localization in Ti-6AI-4V at a high strain rate of 103 s-1. The proposed model is first calibrated employing a 3D 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.
Funding
Engineering and Physical Sciences Research Council (UK) through grant EP/P027555/1, project H2 Manufacturing.
History
School
Mechanical, Electrical and Manufacturing Engineering
Published in
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume
378
Issue
2162
Citation
ZHOU, R. ... et al, 2019. Modelling strain localization in Ti-6Al-4V at high loading rate: A phenomenological approach. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378 (2162), 20190105.
This paper was accepted for publication in the journal Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences and the definitive published version is available at https://doi.org/10.1098/rsta.2019.0105.