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Size-dependent crystal plasticity: from micro-pillar compression to bending

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journal contribution
posted on 2016-06-27, 11:00 authored by Qiang Liu, Anish RoyAnish Roy, Vadim SilberschmidtVadim Silberschmidt
Size-dependent crystal plasticity of metal single crystals is investigated using finite-element method based on a phenomenological crystal-plasticity model, incorporating both first-order and second-order effects. The first-order effect is independent of the nature of the loading state, and described by three phenomenological relationships based on experimental results. The second-order effect is considered in terms of storage of geometrically necessary dislocations, affected significantly by the loading state. The modelling approach is shown to capture the influence of loading conditions on the sample size effect observed in compression and bending experiments. A modelling study demonstrates the subtleness and importance of accounting for first-order and second-order effects in modelling crystalline materials in small length-scales.

Funding

Funding from the Engineering and Physical Sciences Research Council (UK) through grant EP/K028316/1 and Department of Science and Technology (India), project MAST, is gratefully acknowledged.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Mechanics of Materials

Volume

100

Pages

31 - 40

Citation

LIU, Q., ROY, A. and SILBERSCHMIDT, V.V., 2016. Size-dependent crystal plasticity: from micro-pillar compression to bending. Mechanics of Materials, 100, pp. 31 - 40.

Publisher

© Crown copyright. Published by Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016

Notes

This paper was accepted for publication in the journal Mechanics of Materials and the definitive published version is available at http://dx.doi.org/10.1016/j.mechmat.2016.06.002

ISSN

0167-6636

Language

  • en