Elastic-plastic buckling of pipes with asymmetric dual corrosion defects subject to external pressure

In the deep-sea environment, pipelines are prone to buckling instability under the coupling effect of hydrostatic pressure and corrosion defects. This instability phenomenon is affected by the pipe dimensions, material parameters and corrosion defects. Based on the shell buckling theory, a semi-analytical method is proposed to analyze the elastoplastic buckling response of the pipe with dual corrosion defects. The buckling pressure of the pipe can be solved by the characteristic equation numerically. Then, the results of semi-analytical approach are in good agreement with those of experimental tests and FE analysis, which verifies the accuracy of the approach. The effects of geometric dimensions, material parameters, corrosion defect depth and angle on the buckling pressure of the pipe are analyzed in details. In addition, based on the FE model, the collapse mode and the post-buckling response of the pipe with asymmetric dual corrosion defects are considered. The application scope of the semi-analytical approach for pipes with different defect lengths and initial ovality is analyzed. Finally, the semi-analytical approach is extended for pipes with multiple corrosion defects.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2021.109975
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801821013160
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Wu, Hang
  • Zhao, Haisheng
  • Li, Xin
  • Feng, Xin
• Publication Date: 2021-11-15

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Serial:
  • Ocean Engineering
  • Volume: 240
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Buckling; Corrosion; Pressure; Underwater pipelines
• Subject Areas: Marine Transportation; Pipelines;

Filing Info

• Accession Number: 01785429
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 25 2021 9:16AM