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Implementation of an unloading compliance procedure for measurement of crack growth in pipeline steel

Koen Van Minnebruggen UGent, Dries Van Puyvelde UGent, Wim De Waele UGent, Matthias Verstraete UGent, Stijn Hertelé UGent and Rudi Denys UGent (2011) SUSTAINABLE CONSTRUCTION AND DESIGN. 2(3). p.397-406
abstract
As the demand for fossil fuels increases, pipelines are constructed in inhospitable areas. Under these conditions, not only the strength but also the deformability of the pipelines becomes crucial. A strain based design (SBD) procedure needs to be established. Traditional stress based approaches to evaluate defect tolerance lead to conservative predictions. There is a need to accurately define the fracture toughness of the pipeline steel and assess the criticality of weld defects under strain based conditions. This paper focuses on the implementation of the unloading compliance method to determine stable crack growth. The standardized test procedure described in ASTM E1820 is applied. This method is a handy tool to obtain the J-resistance curves which can forecast ductile failure in pipeline girth welds. Preliminary experiments have been performed on Single Edge Notch Bend (SENB) specimens of plain pipe metal. Using the implemented procedure, it was possible to obtain a good fit between calculated and measured crack size. The most important result is the smoothness of the calculated crack growth and the rather monotonic increase of crack size. Since testing on SENB is well known to provide conservative measurements, Single Edge Notch Tension (SENT) specimens will be evaluated in future work.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
resistance curve, Unloading Compliance method, crack growth, Strain based design
in
SUSTAINABLE CONSTRUCTION AND DESIGN
Sustain. Constr. Des.
editor
Jeroen Van Wittenberghe UGent
volume
2
issue
3
issue title
Student contributions to the third Day of Research
pages
397 - 406
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
1167153
handle
http://hdl.handle.net/1854/LU-1167153
date created
2011-02-23 14:52:47
date last changed
2011-05-19 14:15:47
@inproceedings{1167153,
  abstract     = {As the demand for fossil fuels increases, pipelines are constructed in inhospitable areas. Under these conditions, not only the strength but also the deformability of the pipelines becomes crucial. A strain based design (SBD) procedure needs to be established. Traditional stress based approaches to evaluate defect tolerance lead to conservative predictions. There is a need to accurately define the fracture toughness of the pipeline steel and assess the criticality of weld defects under strain based conditions. This paper focuses on the implementation of the unloading compliance method to determine stable crack growth. The standardized test procedure described in ASTM E1820 is applied. This method is a handy tool to obtain the J-resistance curves which can forecast ductile failure in pipeline girth welds. Preliminary experiments have been performed on Single Edge Notch Bend (SENB) specimens of plain pipe metal. Using the implemented procedure, it was possible to obtain a good fit between calculated and measured crack size. The most important result is the smoothness of the calculated crack growth and the rather monotonic increase of crack size. Since testing on SENB is well known to provide conservative measurements, Single Edge Notch Tension (SENT) specimens will be evaluated in future work.},
  author       = {Van Minnebruggen, Koen and Van Puyvelde, Dries and De Waele, Wim and Verstraete, Matthias and Hertel{\'e}, Stijn and Denys, Rudi},
  booktitle    = {SUSTAINABLE CONSTRUCTION AND DESIGN},
  editor       = {Van Wittenberghe, Jeroen},
  isbn         = {9789490726010},
  issn         = {2032-7471},
  keyword      = {resistance curve,Unloading Compliance method,crack growth,Strain based design},
  language     = {eng},
  location     = {Ghent, Belgium},
  number       = {3},
  pages        = {397--406},
  publisher    = {Ghent University, Laboratory Soete},
  title        = {Implementation of an unloading compliance procedure for measurement of crack growth in pipeline steel},
  volume       = {2},
  year         = {2011},
}

Chicago
Van Minnebruggen, Koen, Dries Van Puyvelde, Wim De Waele, Matthias Verstraete, Stijn Hertelé, and Rudi Denys. 2011. “Implementation of an Unloading Compliance Procedure for Measurement of Crack Growth in Pipeline Steel.” In Sustainable Construction and Design, ed. Jeroen Van Wittenberghe, 2:397–406. Ghent, Belgium: Ghent University, Laboratory Soete.
APA
Van Minnebruggen, K., Van Puyvelde, D., De Waele, W., Verstraete, M., Hertelé, S., & Denys, R. (2011). Implementation of an unloading compliance procedure for measurement of crack growth in pipeline steel. In J. Van Wittenberghe (Ed.), SUSTAINABLE CONSTRUCTION AND DESIGN (Vol. 2, pp. 397–406). Presented at the Sustainable Construction and Design 2011 (SCAD), Ghent, Belgium: Ghent University, Laboratory Soete.
Vancouver
1.
Van Minnebruggen K, Van Puyvelde D, De Waele W, Verstraete M, Hertelé S, Denys R. Implementation of an unloading compliance procedure for measurement of crack growth in pipeline steel. In: Van Wittenberghe J, editor. SUSTAINABLE CONSTRUCTION AND DESIGN. Ghent, Belgium: Ghent University, Laboratory Soete; 2011. p. 397–406.
MLA
Van Minnebruggen, Koen, Dries Van Puyvelde, Wim De Waele, et al. “Implementation of an Unloading Compliance Procedure for Measurement of Crack Growth in Pipeline Steel.” Sustainable Construction and Design. Ed. Jeroen Van Wittenberghe. Vol. 2. Ghent, Belgium: Ghent University, Laboratory Soete, 2011. 397–406. Print.