The Single Edge Notched Tension (SENT) specimen is a common tool for the determination of tearing resistance in pipeline steels and welds. However, it assumes pure mode I crack tip loading, which is unrepresentative for the evaluation of spiral seam weld flaws. To this purpose, the authors have performed SENT tests using specimens with a tilted notch. This paper evaluates experimental techniques to obtain the tearing resistance of such specimens. Mixed-mode crack opening displacement and ductile tearing are successfully measured using digital image correlation and direct current potential drop, respectively. The latter technique involves a calibration on the basis of a thermo-electric finite element model. Tearing resistance tends to increase with increasing notch tilt angle. Based on the limited number of tests performed, tilted notch SENT testing appears to be a promising tool for the assessment of spiral seam weld flaws.
- Pipeline Division
Determination of CTOD Resistance Curves in SENT Specimens With a Tilted Notch
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Van Minnebruggen, K, Verstraete, M, Denys, R, Thibaux, P, & De Waele, W. "Determination of CTOD Resistance Curves in SENT Specimens With a Tilted Notch." Proceedings of the 2014 10th International Pipeline Conference. Volume 4: Production Pipelines and Flowlines; Project Management; Facilities Integrity Management; Operations and Maintenance; Pipelining in Northern and Offshore Environments; Strain-Based Design; Standards and Regulations. Calgary, Alberta, Canada. September 29–October 3, 2014. V004T11A015. ASME. https://doi.org/10.1115/IPC2014-33571
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