The crack tip opening displacement (CTOD)-based fracture toughness has been widely used for structural integrity assessment and strain-based design of oil and gas pipelines. The double-clip on gauge method has been used to experimentally determine CTOD. In this study, three-dimensional (3D) finite element analyses of clamped single-edge tension (SE(T)) specimens are carried out to investigate the accuracy of the CTOD evaluation equation associated with the double-clip on gauge method. The analysis considers SE(T) specimens with ranges of crack lengths (0.3 ≤ a/W ≤ 0.7) and specimen thickness (B/W = 0.5, 1 and 2). Based on the analysis results, a modified CTOD evaluation equation based on the double-clip on gauge method is developed to improve the accuracy of the CTOD evaluation. This study will facilitate the application of the fracture toughness determined from the SE(T) specimen in the strain-based design of pipelines.
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2014 10th International Pipeline Conference
September 29–October 3, 2014
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-4612-4
PROCEEDINGS PAPER
Accuracy of the Double-Clip on Gauge Method for Evaluating CTOD of SE(T) Specimens
Zijian Yan,
Zijian Yan
The University of Western Ontario, London, ON, Canada
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Yifan Huang,
Yifan Huang
The University of Western Ontario, London, ON, Canada
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Wenxing Zhou
Wenxing Zhou
The University of Western Ontario, London, ON, Canada
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Zijian Yan
The University of Western Ontario, London, ON, Canada
Yifan Huang
The University of Western Ontario, London, ON, Canada
Wenxing Zhou
The University of Western Ontario, London, ON, Canada
Paper No:
IPC2014-33219, V003T07A033; 8 pages
Published Online:
December 9, 2014
Citation
Yan, Z, Huang, Y, & Zhou, W. "Accuracy of the Double-Clip on Gauge Method for Evaluating CTOD of SE(T) Specimens." Proceedings of the 2014 10th International Pipeline Conference. Volume 3: Materials and Joining; Risk and Reliability. Calgary, Alberta, Canada. September 29–October 3, 2014. V003T07A033. ASME. https://doi.org/10.1115/IPC2014-33219
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