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Design characteristics that improve the fatigue life of threaded pipe connections

Jeroen Van Wittenberghe, Patrick De Baets UGent, Wim De Waele UGent, Timothy Galle UGent, Tien Thanh Bui and Guido De Roeck (2011) SUSTAINABLE CONSTRUCTION AND DESIGN. 2(2). p.334-341
abstract
Threaded pipe connections are commonly used to connect risers, tendons, drill pipes and well casing strings. In these applications fatigue resistance plays an important role. A large variety of patented design features exist, all claiming to improve the connection’s fatigue life. However, patent documents only contain claims and numerical or experimental data about these connection’s performance is generally not published. This makes it hard to make a quantitative comparison between different designs. In this study an overview is given of fatigue resistant threaded connections. Two major methods to improve the fatigue life of a connection were identified. First of all, local stress concentrations can be reduced by optimizing the geometry of the threads. Second the global shape of the connection can be optimized to obtain a more uniform load distribution. Using a parametric finite element model, different designs were compared. The connections were modelled by a 2D axisymmetric geometry with non-linear material properties and elaborate contact conditions. Selected designs have been subjected to experimental tests in a four-point bending fatigue setup. The experimental tests serve as a validation for the results of the numerical simulations. It was found that the multiaxial stress distribution at the thread roots is the defining factor for the fatigue life of the connection. Nevertheless, these stresses can be changed by the global geometry of the connection. It can be concluded that the fatigue life of threaded connections is determined by a combination of global and local aspects which should both be analysed for fatigue life calculations.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
threaded pipe connection, experiment, finite element model, fatigue, patent
in
SUSTAINABLE CONSTRUCTION AND DESIGN
Sustain. Constr. Des.
editor
Jeroen Van Wittenberghe
volume
2
issue
2
issue title
Materials and structures in construction and design
pages
334 - 341
publisher
Ghent University, Laboratory Soete
place of publication
Ghent, Belgium
conference name
Sustainable Construction and Design 2011 (SCAD)
conference location
Ghent, Belgium
conference start
2011-02-16
conference end
2011-02-17
ISSN
2032-7471
ISBN
9789490726010
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1177009
handle
http://hdl.handle.net/1854/LU-1177009
date created
2011-02-28 17:16:53
date last changed
2017-01-02 09:52:27
@inproceedings{1177009,
  abstract     = {Threaded pipe connections are commonly used to connect risers, tendons, drill pipes and well casing strings. In these applications fatigue resistance plays an important role. A large variety of patented design features exist, all claiming to improve the connection{\textquoteright}s fatigue life. However, patent documents only contain claims and numerical or experimental data about these connection{\textquoteright}s performance is generally not published. This makes it hard to make a quantitative comparison between different designs. In this study an overview is given of fatigue resistant threaded connections. Two major methods to improve the fatigue life of a connection were identified. First of all, local stress concentrations can be reduced by optimizing the geometry of the threads. Second the global shape of the connection can be optimized to obtain a more uniform load distribution. Using a parametric finite element model, different designs were compared. The connections were modelled by a 2D axisymmetric geometry with non-linear material properties and elaborate contact conditions. Selected designs have been subjected to experimental tests in a four-point bending fatigue setup. The experimental tests serve as a validation for the results of the numerical simulations. It was found that the multiaxial stress distribution at the thread roots is the defining factor for the fatigue life of the connection. Nevertheless, these stresses can be changed by the global geometry of the connection. It can be concluded that the fatigue life of threaded connections is determined by a combination of global and local aspects which should both be analysed for fatigue life calculations.},
  author       = {Van Wittenberghe, Jeroen and De Baets, Patrick and De Waele, Wim and Galle, Timothy and Bui, Tien Thanh and De Roeck, Guido},
  booktitle    = {SUSTAINABLE CONSTRUCTION AND DESIGN},
  editor       = {Van Wittenberghe, Jeroen},
  isbn         = {9789490726010},
  issn         = {2032-7471},
  keyword      = {threaded pipe connection,experiment,finite element model,fatigue,patent},
  language     = {eng},
  location     = {Ghent, Belgium},
  number       = {2},
  pages        = {334--341},
  publisher    = {Ghent University, Laboratory Soete},
  title        = {Design characteristics that improve the fatigue life of threaded pipe connections},
  volume       = {2},
  year         = {2011},
}

Chicago
Van Wittenberghe, Jeroen, Patrick De Baets, Wim De Waele, Timothy Galle, Tien Thanh Bui, and Guido De Roeck. 2011. “Design Characteristics That Improve the Fatigue Life of Threaded Pipe Connections.” In Sustainable Construction and Design, ed. Jeroen Van Wittenberghe, 2:334–341. Ghent, Belgium: Ghent University, Laboratory Soete.
APA
Van Wittenberghe, J., De Baets, P., De Waele, W., Galle, T., Bui, T. T., & De Roeck, G. (2011). Design characteristics that improve the fatigue life of threaded pipe connections. In J. Van Wittenberghe (Ed.), SUSTAINABLE CONSTRUCTION AND DESIGN (Vol. 2, pp. 334–341). Presented at the Sustainable Construction and Design 2011 (SCAD), Ghent, Belgium: Ghent University, Laboratory Soete.
Vancouver
1.
Van Wittenberghe J, De Baets P, De Waele W, Galle T, Bui TT, De Roeck G. Design characteristics that improve the fatigue life of threaded pipe connections. In: Van Wittenberghe J, editor. SUSTAINABLE CONSTRUCTION AND DESIGN. Ghent, Belgium: Ghent University, Laboratory Soete; 2011. p. 334–41.
MLA
Van Wittenberghe, Jeroen, Patrick De Baets, Wim De Waele, et al. “Design Characteristics That Improve the Fatigue Life of Threaded Pipe Connections.” Sustainable Construction and Design. Ed. Jeroen Van Wittenberghe. Vol. 2. Ghent, Belgium: Ghent University, Laboratory Soete, 2011. 334–341. Print.