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Numerically produced forming limit diagrams for metal sheets with voids considering micromechanical effects

Kristensson, Ola LU (2006) In European Journal of Mechanics. A, Solids 25(1). p.13-23
Abstract
A numerical study of how changes in the micromechanical modeling affect the formability of voided metal sheets is conducted. A homogenization technique, where periodic representative volume elements are used, permits investigations of the global formability where the local material mechanisms and the microstructure are accounted for. A nonlocal material model, containing a constitutive material length, is used to include size dependence in the formulation. When the nonlocal material assumption is adopted, the formability is shown to be lowered as compared to the response of the local material assumption. Altering the void distribution, to a more clustered state, is also found to decrease the formability. Increasing the initial volume... (More)
A numerical study of how changes in the micromechanical modeling affect the formability of voided metal sheets is conducted. A homogenization technique, where periodic representative volume elements are used, permits investigations of the global formability where the local material mechanisms and the microstructure are accounted for. A nonlocal material model, containing a constitutive material length, is used to include size dependence in the formulation. When the nonlocal material assumption is adopted, the formability is shown to be lowered as compared to the response of the local material assumption. Altering the void distribution, to a more clustered state, is also found to decrease the formability. Increasing the initial volume fraction of voids affects the formability by lowering and reshaping the formability curve. When the strain hardening exponent is increased the formability curve is found to be lowered. (c) 2005 Elsevier SAS. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
homogenization, formability, voids
in
European Journal of Mechanics. A, Solids
volume
25
issue
1
pages
13 - 23
publisher
Elsevier
external identifiers
  • wos:000234880600002
  • scopus:27844435573
ISSN
1873-7285
DOI
10.1016/j.euromechsol.2005.05.007
language
English
LU publication?
yes
id
97fb2a63-2496-4d8a-84df-60e0ef3f29be (old id 419483)
date added to LUP
2016-04-01 11:40:27
date last changed
2021-02-17 08:02:40
@article{97fb2a63-2496-4d8a-84df-60e0ef3f29be,
  abstract     = {A numerical study of how changes in the micromechanical modeling affect the formability of voided metal sheets is conducted. A homogenization technique, where periodic representative volume elements are used, permits investigations of the global formability where the local material mechanisms and the microstructure are accounted for. A nonlocal material model, containing a constitutive material length, is used to include size dependence in the formulation. When the nonlocal material assumption is adopted, the formability is shown to be lowered as compared to the response of the local material assumption. Altering the void distribution, to a more clustered state, is also found to decrease the formability. Increasing the initial volume fraction of voids affects the formability by lowering and reshaping the formability curve. When the strain hardening exponent is increased the formability curve is found to be lowered. (c) 2005 Elsevier SAS. All rights reserved.},
  author       = {Kristensson, Ola},
  issn         = {1873-7285},
  language     = {eng},
  number       = {1},
  pages        = {13--23},
  publisher    = {Elsevier},
  series       = {European Journal of Mechanics. A, Solids},
  title        = {Numerically produced forming limit diagrams for metal sheets with voids considering micromechanical effects},
  url          = {http://dx.doi.org/10.1016/j.euromechsol.2005.05.007},
  doi          = {10.1016/j.euromechsol.2005.05.007},
  volume       = {25},
  year         = {2006},
}