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Crack growth characterization in single-edge notched tension testing by means of direct current potential drop measurement

Koen Van Minnebruggen (UGent) , Stijn Hertelé (UGent) , Matthias Verstraete (UGent) and Wim De Waele (UGent)
(2017) INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING. 156. p.68-78
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Abstract
Single-edge notched tension (SENT) testing has gained attention for the characterization of crack growth resistance in scenarios of low crack tip constraint conditions. One challenge of SENT testing is the experimental characterization of crack extension during the test. Two common methods exist: unloading compliance and direct current potential drop (DCPD). Whereas the former method is fairly extensively described in existing procedures, applying the latter mostly depends on user experience and in-house developed analysis algorithms. This paper describes Ghent University's approach for DCPD measurements of ductile crack extension in SENT testing. A reference voltage drop measurement is advised, aiming to account for current leak and changes in electrical conductivity. Then, attention goes to the sensitivity of the procedure with respect to changes in crack size and its robustness with respect to probe positioning errors. Finally, DCPD is shown to have similar capabilities to unloading compliance with respect to defect sizing accuracy. The results of this paper are aimed to contribute to a more prescriptive description of DCPD measurements in revised SENT test procedures or standards.
Keywords
SENT test, direct current potential drop, Johnson, unloading compliance

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MLA
Van Minnebruggen, Koen, et al. “Crack Growth Characterization in Single-Edge Notched Tension Testing by Means of Direct Current Potential Drop Measurement.” INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, vol. 156, Elsevier BV, 2017, pp. 68–78, doi:10.1016/j.ijpvp.2017.06.009.
APA
Van Minnebruggen, K., Hertelé, S., Verstraete, M., & De Waele, W. (2017). Crack growth characterization in single-edge notched tension testing by means of direct current potential drop measurement. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 156, 68–78. https://doi.org/10.1016/j.ijpvp.2017.06.009
Chicago author-date
Van Minnebruggen, Koen, Stijn Hertelé, Matthias Verstraete, and Wim De Waele. 2017. “Crack Growth Characterization in Single-Edge Notched Tension Testing by Means of Direct Current Potential Drop Measurement.” INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING 156: 68–78. https://doi.org/10.1016/j.ijpvp.2017.06.009.
Chicago author-date (all authors)
Van Minnebruggen, Koen, Stijn Hertelé, Matthias Verstraete, and Wim De Waele. 2017. “Crack Growth Characterization in Single-Edge Notched Tension Testing by Means of Direct Current Potential Drop Measurement.” INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING 156: 68–78. doi:10.1016/j.ijpvp.2017.06.009.
Vancouver
1.
Van Minnebruggen K, Hertelé S, Verstraete M, De Waele W. Crack growth characterization in single-edge notched tension testing by means of direct current potential drop measurement. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING. 2017;156:68–78.
IEEE
[1]
K. Van Minnebruggen, S. Hertelé, M. Verstraete, and W. De Waele, “Crack growth characterization in single-edge notched tension testing by means of direct current potential drop measurement,” INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, vol. 156, pp. 68–78, 2017.
@article{8536132,
  abstract     = {{Single-edge notched tension (SENT) testing has gained attention for the characterization of crack growth resistance in scenarios of low crack tip constraint conditions. One challenge of SENT testing is the experimental characterization of crack extension during the test. Two common methods exist: unloading compliance and direct current potential drop (DCPD). Whereas the former method is fairly extensively described in existing procedures, applying the latter mostly depends on user experience and in-house developed analysis algorithms. This paper describes Ghent University's approach for DCPD measurements of ductile crack extension in SENT testing. A reference voltage drop measurement is advised, aiming to account for current leak and changes in electrical conductivity. Then, attention goes to the sensitivity of the procedure with respect to changes in crack size and its robustness with respect to probe positioning errors. Finally, DCPD is shown to have similar capabilities to unloading compliance with respect to defect sizing accuracy. The results of this paper are aimed to contribute to a more prescriptive description of DCPD measurements in revised SENT test procedures or standards.}},
  author       = {{Van Minnebruggen, Koen and Hertelé, Stijn and Verstraete, Matthias and De Waele, Wim}},
  issn         = {{0308-0161}},
  journal      = {{INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING}},
  keywords     = {{SENT test,direct current potential drop,Johnson,unloading compliance}},
  language     = {{eng}},
  pages        = {{68--78}},
  publisher    = {{Elsevier BV}},
  title        = {{Crack growth characterization in single-edge notched tension testing by means of direct current potential drop measurement}},
  url          = {{http://doi.org/10.1016/j.ijpvp.2017.06.009}},
  volume       = {{156}},
  year         = {{2017}},
}
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