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Fatigue crack propagation in Ti-6Al-4V subjected to high strain amplitudes

Andersson, Michael LU ; Hansson, Tomas; Persson, Christer LU and Melin, Solveig LU (2005) In Fatigue & Fracture of Engineering Materials & Structures 28(3). p.301-308
Abstract
Fatigue crack propagation in circular Ti-6Al-4V specimens subjected to high strain amplitudes has been investigated. Crack closure was measured with an electrical potential-drop technique. Closure was shown not to depend on strain ratio but to be a function of the applied strain range. At higher strain ranges, the crack was found to be closed for a smaller part of the load cycle than at lower strain ranges due to blunting of the crack tip. Furthermore, the use of a strain-intensity approach to predict crack-propagation rate was investigated, and it was found that for the upper parts of the da/dN curves the effective strain intensity yields good predictions. Also, the effective stress-intensity factor was found to collapse the da/dN curves... (More)
Fatigue crack propagation in circular Ti-6Al-4V specimens subjected to high strain amplitudes has been investigated. Crack closure was measured with an electrical potential-drop technique. Closure was shown not to depend on strain ratio but to be a function of the applied strain range. At higher strain ranges, the crack was found to be closed for a smaller part of the load cycle than at lower strain ranges due to blunting of the crack tip. Furthermore, the use of a strain-intensity approach to predict crack-propagation rate was investigated, and it was found that for the upper parts of the da/dN curves the effective strain intensity yields good predictions. Also, the effective stress-intensity factor was found to collapse the da/dN curves for different load ratios. (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
crack propagation, fatigue, crack closure, strain-intensity factor
in
Fatigue & Fracture of Engineering Materials & Structures
volume
28
issue
3
pages
301 - 308
publisher
Wiley-Blackwell
external identifiers
  • wos:000227382900004
  • scopus:14544299596
ISSN
1460-2695
DOI
10.1111/j.1460-2695.2004.00858.x
language
English
LU publication?
yes
id
90b37e5c-f7cb-4c94-8f85-076ca3ec6a12 (old id 250556)
alternative location
http://search.ebscohost.com/login.aspx?direct=true&db=a9h&AN=15924441&site=ehost-live
date added to LUP
2007-08-13 11:40:35
date last changed
2017-01-01 04:49:24
@article{90b37e5c-f7cb-4c94-8f85-076ca3ec6a12,
  abstract     = {Fatigue crack propagation in circular Ti-6Al-4V specimens subjected to high strain amplitudes has been investigated. Crack closure was measured with an electrical potential-drop technique. Closure was shown not to depend on strain ratio but to be a function of the applied strain range. At higher strain ranges, the crack was found to be closed for a smaller part of the load cycle than at lower strain ranges due to blunting of the crack tip. Furthermore, the use of a strain-intensity approach to predict crack-propagation rate was investigated, and it was found that for the upper parts of the da/dN curves the effective strain intensity yields good predictions. Also, the effective stress-intensity factor was found to collapse the da/dN curves for different load ratios.},
  author       = {Andersson, Michael and Hansson, Tomas and Persson, Christer and Melin, Solveig},
  issn         = {1460-2695},
  keyword      = {crack propagation,fatigue,crack closure,strain-intensity factor},
  language     = {eng},
  number       = {3},
  pages        = {301--308},
  publisher    = {Wiley-Blackwell},
  series       = {Fatigue & Fracture of Engineering Materials & Structures},
  title        = {Fatigue crack propagation in Ti-6Al-4V subjected to high strain amplitudes},
  url          = {http://dx.doi.org/10.1111/j.1460-2695.2004.00858.x},
  volume       = {28},
  year         = {2005},
}