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Micro-indentation based study on steel sheet degradation through forming and flattening: Toward a predictive model to assess cold recyclability

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journal contribution
posted on 08.08.2016, 11:17 by Javad Falsafi, Emrah DemirciEmrah Demirci
In Cold Roll Forming (CRF) process sheet material undergo a complex set of deformation that entail complicated through thickness residual deformation. This paper, focuses on material behaviour in CRF processes, with regarding damage and material degradation. A roll forming process is taken as case study and experimental investigation using extensive microhardness mapping alongside FE simulation of the process are the basis of material damage study. Indentation on different cross-sectional cutting angles -45, 0, 45 has been performed to study the sensitivity to orientation and crystallographic texture. A 3D Finite Element simulation with emphasis on through-thickness variation of the plastic deformation was carried out, using multiple layers of solid elements representing the sheet. A smart approach to reduce computational cost was employed in MSC.Marc by implementing simulation of a master model of complete material with shell elements, followed by partial sub-modelling comprising solid elements in regions of interest. This cross-sectional hardness map was then converted to the corresponding equivalent plastic strain in the cross section for validation. The correlation factor between Hardness and yield stress was discussed.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Materials & Design

Volume

109

Pages

456 - 465 (10)

Citation

FALSAFI, J. and DEMIRCI, E., 2016. Micro-indentation based study on steel sheet degradation through forming and flattening: Toward a predictive model to assess cold recyclability. Materials & Design, 109, pp. 456-465.

Publisher

© 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/

Acceptance date

14/07/2016

Publication date

2016-07-16

Notes

This paper was accepted for publication in the journal Materials & Design and the definitive published version is available at http://dx.doi.org/10.1016/j.matdes.2016.07.075.

ISSN

0261-3069

eISSN

0264-1275

Language

en