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- Title
Prediction of the fracture life of a wrinkled steel pipe subject to low cycle fatigue load.
- Authors
Das, Sreekanta; Cheng, J. J. Roger; Murray, David W.
- Abstract
The economy of Canada depends largely on the performance of the hydrocarbon-based energy industry (oil and gas), which in turn is dependent on the performance of steel pipelines that are used for transporting crude oil, natural gas, and petroleum products. Field observations of buried pipelines indicate that it is not uncommon for geotechnical movements to impose large displacements on the pipelines, resulting in localized curvature, deformations, and strain in the pipe wall. Often these local deformations result in local buckling (wrinkling) in the pipe wall, and in the post-buckling range of response such wrinkles develop rapidly. Subsequent cyclic load histories may produce cyclic plastic strain reversals leading to the formation of fractures in the wrinkle region. This paper presents the development and application of a simple fracture-life assessment model that can be used successfully by the pipeline industries to assess the remaining life before fracture of wrinkled pipelines subject to strain reversals due to low cycle fatigue loadings.
- Subjects
CANADA; ENERGY industries; POWER resources; HYDROCARBONS; ORGANIC compounds; PETROLEUM products; PETROLEUM refining; COMMERCIAL products; MECHANICAL buckling
- Publication
Canadian Journal of Civil Engineering, 2007, Vol 34, Issue 9, p1131
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/L07-032