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An integrated approach to model strain localization bands in magnesium alloys

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journal contribution
posted on 2017-10-05, 09:47 authored by Konstantinos BaxevanakisKonstantinos Baxevanakis, C. Mo, M. Cabal, A. Kontsos
Strain localization bands (SLBs) that appear at early stages of deformation of magnesium alloys have been recently associated with heterogeneous activation of deformation twinning. Experimental evidence has demonstrated that such “Lüders-type” band formations dominate the overall mechanical behavior of these alloys resulting in sigmoidal type stress–strain curves with a distinct plateau followed by pronounced anisotropic hardening. To evaluate the role of SLB formation on the local and global mechanical behavior of magnesium alloys, an integrated experimental/computational approach is presented. The computational part is developed based on custom subroutines implemented in a finite element method that combine a plasticity model with a stiffness degradation approach. Specific inputs from the characterization and testing measurements to the computational approach are discussed while the numerical results are validated against such available experimental information, confirming the existence of load drops and the intensification of strain accumulation at the time of SLB initiation.

Funding

The corresponding author acknowledges the financial support provided by the National Science Foundation through the CMMI #1434506 award to Drexel University.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Computational Mechanics

Volume

61

Issue

1-2

Pages

119 - 135

Citation

BAXEVANAKIS, K.P. ... et al, 2018. An integrated approach to model strain localization bands in magnesium alloys. Computational Mechanics, 61 (1–2), pp. 119–135.

Publisher

© Springer

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/

Acceptance date

2017-08-25

Publication date

2017-09-14

Notes

This is a post-peer-review, pre-copyedit version of an article published in Computational Mechanics. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00466-017-1480-6.

ISSN

0178-7675

eISSN

1432-0924

Language

  • en