Experimental Techniques in Fracture Characterization


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Characterization of fracture toughness is discussed in relation to specification of steels for northern pipelines. The state of the art and research trends in measurement of CTOD for girth welds and CTOA for linepipe steel are described.



Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera




W. R. Tyson "Experimental Techniques in Fracture Characterization", Materials Science Forum, Vols. 567-568, pp. 39-44, 2008

Online since:

December 2007





[1] Shen, G., Gianetto, J.A., Bouchard, R., Bowker, J.T. and Tyson, W.R., Fracture toughness testing of pipeline girth welds, 5 th International Pipeline Conference, IPC04-0320, Calgary, AB, Canada, Oct. 4-8, 2004, pp.1-10.

DOI: 10.1115/ipc2004-0320

[2] CSA Z662, Oil and Gas Pipeline Systems, Canadian Standards Association, Mississauga, Ontario, Canada Fig. 8. Data from Fig. 7 plotted to enable calculation of CTOA from slope.

[3] ASTM E 1290, Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement, ASTM International, Pennsylvania, USA.

DOI: 10.1520/e1290

[4] ASTM E 1820, Standard Test Method for Measurement of Fracture Toughness, ASTM International, Pennsylvania, USA.

[5] ASTM E 1921, Standard Test Method for Determination of Reference Temperature, T0, for Ferritic Steels in the Transition Range, ASTM International, Pennsylvania, USA.

[6] API 5L3 (RP), Conducting Drop-Weight Tear Tests on Line Pipe, American Petroleum Institute, USA.

[7] Rice, J.R. and Sorensen, E.P., Continuing crack-tip deformation and fracture for plane-strain crack growth in elastic-plastic solids, Journal of the Mechanics and Physics of Solids, vol. 26, 1978, pp.163-186.

DOI: 10.1016/0022-5096(78)90007-8

[8] Shen, G., Tyson, W.R., Glover, A., and Horsley, D., Constraint effects on linepipe toughness, 4 th International Conference on Pipeline Technology, Ostend, Belgium, 9-13 May 2004, pp.703-720.

[9] Tyson, W. R., Shen, G., and Roy, G., Effect of Biaxial Stress on ECA of Pipelines under Strain-Based Design, ISOPE-2007, Lisbon, Portugal, (2007).

[10] Xu, S., Bouchard, R., and Tyson, W.R., Simplified Single-specimen Method for Evaluating CTOA, Engng. Fract. Mech. 74 (2007) 2459-2464.

DOI: 10.1016/j.engfracmech.2006.11.013

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