Open Access System for Information Sharing

Login Library

 

Article
Cited 52 time in webofscience Cited 62 time in scopus
Metadata Downloads

Evaluating the significance of hardening behavior and unloading modulus under strain reversal in sheet springback prediction SCIE SCOPUS

Title
Evaluating the significance of hardening behavior and unloading modulus under strain reversal in sheet springback prediction
Authors
Zang, SLLee, MGKim, JH
Date Issued
2013-12
Publisher
Elsevier
Abstract
Springback is one of the most important problems that should be compensated in sheet metal forming process with the increasing application of advanced high strength steels and light-weight alloys. In the finite element analyses for the springback, accurate modeling of Bauschinger effect, transient behavior and permanent softening under cyclic loading has been recognized as the most critical hardening behavior in the constitutive modeling aspect. However, if parts of these hardening behavior are not well modelled, is the accuracy of springback prediction seriously deteriorated? To answer this question, in this paper the significance of Bauschinger effect and transient behavior, permanent softening and unloading modulus in springback prediction were estimated using the springback problem of U-draw/bending simulations proposed at Numisheet2011 Benchmark. A recent anisotropic non-linear kinematic (ANK) model [Zang S, Guo C, Thuillier S, Lee M. A model of one-surface cyclic plasticity and its application to springback prediction. Int J Mech Sci 2011:53:425-35.] was adopted to estimate the significance of hardening behavior and unloading modulus because of its special feature. The ANK model can predict exactly the same monotonous stress-strain curves for different hardening schemes, while different Bauschinger effect and transient behavior under one-dimensional cyclic loading can be also modelled. This feature is quite suitable to quantitatively evaluate the effects of the aforementioned hardening behaviors in springback prediction. Initial anisotropy is described by the anisotropic yield function Yld2000-2d. The unloading behavior is also considered by defining Young's modulus as a function of equivalent plastic strain. Several quantitative analyses were carried out to distinguish the effect of each hardening component and unloading elastic modulus scheme. Finally, the predicted springback by different models were compared with experiments for both as-received and pre-strained DP780 steel sheets. (C) 2013 Elsevier Ltd. All rights reserved.
URI
https://oasis.postech.ac.kr/handle/2014.oak/27392
DOI
10.1016/J.IJMECSCI.2013.09.033
ISSN
0020-7403
Article Type
Article
Citation
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, vol. 77, page. 194 - 204, 2013-12
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Views & Downloads

Browse