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Constitutive dependence in finite-element modelling of crack closure during fatigue

Andersson, Henrik LU ; Persson, Christer LU ; Hansson, Tomas; Melin, Solveig LU and Järvstråt, Niklas (2004) In Fatigue & Fracture of Engineering Materials & Structures 27(2). p.75-87
Abstract
The influence of choice of constitutive relation on the prediction of crack-opening stress for fatigue cracks using the finite-element method is investigated and compared with experimental results. Two different experimentally obtained stress–strain relations for IN718 at 550 °C were used for fitting material parameters to the linear kinematic and the Bodner–Partom viscoplastic constitutive models. In addition, one reference material description and one Bodner–Partom with parameters fitted to both types of experiment was used, i.e., in total six constitutive descriptions. Experimental values for crack-opening stress were found by the potential drop method for the two load cases analyzed. Two different load cases, load control and... (More)
The influence of choice of constitutive relation on the prediction of crack-opening stress for fatigue cracks using the finite-element method is investigated and compared with experimental results. Two different experimentally obtained stress–strain relations for IN718 at 550 °C were used for fitting material parameters to the linear kinematic and the Bodner–Partom viscoplastic constitutive models. In addition, one reference material description and one Bodner–Partom with parameters fitted to both types of experiment was used, i.e., in total six constitutive descriptions. Experimental values for crack-opening stress were found by the potential drop method for the two load cases analyzed. Two different load cases, load control and displacement control, have been examined. It turns out that the correlation between experimental and analytical crack-opening stress vary significantly with material description, opening criteria in the simulation and load case. The investigation shows that care must be taken when choosing material description and opening criteria for crack propagation simulations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
fatigue, finite-element modelling, Bodner-Partom, crack closure, material model, IN718
in
Fatigue & Fracture of Engineering Materials & Structures
volume
27
issue
2
pages
75 - 87
publisher
Wiley-Blackwell
external identifiers
  • wos:000188410900001
  • scopus:1342303542
ISSN
1460-2695
DOI
10.1111/j.1460-2695.2004.00724.x
language
English
LU publication?
yes
id
5843bbce-0617-4eaf-b129-efb597bc4ec3 (old id 776095)
alternative location
http://www.blackwell-synergy.com/links/doi/10.1111%2Fj.1460-2695.2004.00724.x
date added to LUP
2008-02-12 08:54:18
date last changed
2017-01-01 04:58:52
@article{5843bbce-0617-4eaf-b129-efb597bc4ec3,
  abstract     = {The influence of choice of constitutive relation on the prediction of crack-opening stress for fatigue cracks using the finite-element method is investigated and compared with experimental results. Two different experimentally obtained stress–strain relations for IN718 at 550 °C were used for fitting material parameters to the linear kinematic and the Bodner–Partom viscoplastic constitutive models. In addition, one reference material description and one Bodner–Partom with parameters fitted to both types of experiment was used, i.e., in total six constitutive descriptions. Experimental values for crack-opening stress were found by the potential drop method for the two load cases analyzed. Two different load cases, load control and displacement control, have been examined. It turns out that the correlation between experimental and analytical crack-opening stress vary significantly with material description, opening criteria in the simulation and load case. The investigation shows that care must be taken when choosing material description and opening criteria for crack propagation simulations.},
  author       = {Andersson, Henrik and Persson, Christer and Hansson, Tomas and Melin, Solveig and Järvstråt, Niklas},
  issn         = {1460-2695},
  keyword      = {fatigue,finite-element modelling,Bodner-Partom,crack closure,material model,IN718},
  language     = {eng},
  number       = {2},
  pages        = {75--87},
  publisher    = {Wiley-Blackwell},
  series       = {Fatigue & Fracture of Engineering Materials & Structures},
  title        = {Constitutive dependence in finite-element modelling of crack closure during fatigue},
  url          = {http://dx.doi.org/10.1111/j.1460-2695.2004.00724.x},
  volume       = {27},
  year         = {2004},
}