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

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journal contribution
posted on 18.06.2019 by Rongxin Zhou, Ka-Ho (Xavier) Pang, Anuj Bisht, Anish Roy, Satyam Suwas, Vadim Silberschmidt
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.

Publisher

Royal Society © The authors

Version

AM (Accepted Manuscript)

Publisher statement

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.

Acceptance date

10/06/2019

Publication date

2019-11-25

Copyright date

2019

ISSN

1364-503X

eISSN

1471-2962

Language

en

Article number

20190105

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