Development of finite element based defect assessment method for gas pipelines subject to operating condition changes

Woosik Kim, Jonghyeon Baek, Yun-Jae Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Assessment methodology of structural integrity of gas pipeline is very important. For assessment of gas pipeline, many tests under various conditions have to be done. But test of real gas pipe is very dangerous and expensive. The objectives of this study are to develop micro-mechanical model for assessment of structural integrity of natural gas pipeline and develop damage model for assessment of defects in pipeline. We developed phenomenological damage simulation method for assessment of failure of natural gas pipeline, and developed user-subroutines in ABAQUS for implementation. This paper proposes a new method to simulate ductile failure using finite element analysis based on the stress-modified fracture strain model. A procedure is given to determine the stress-modified fracture strain as a function of the stress triaxiality from smooth and notched bar tensile tests with FE analyses. For validation, simulated results using the proposed method are compared with experimental data for cracked bar (tensile and bend) tests, extracted from API X65 pipes, and for full-scale burst test of gouged pipes, showing overall good agreements. Advantages in the use of the proposed method for practical structural integrity assessment of natural gas pipeline are discussed.

Original languageEnglish
Title of host publicationInternational Gas Research Conference Proceedings
Pages1788-1801
Number of pages14
Volume3
Publication statusPublished - 2011 Dec 1
EventInternational Gas Union Research Conference 2011, IGRC 2011 - Seoul, Korea, Republic of
Duration: 2011 Oct 192011 Oct 21

Other

OtherInternational Gas Union Research Conference 2011, IGRC 2011
CountryKorea, Republic of
CitySeoul
Period11/10/1911/10/21

Fingerprint

Natural gas pipelines
Gas pipelines
Structural integrity
Pipe
Defects
Subroutines
ABAQUS
Application programming interfaces (API)
Pipelines
Finite element method
Gases

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Kim, W., Baek, J., & Kim, Y-J. (2011). Development of finite element based defect assessment method for gas pipelines subject to operating condition changes. In International Gas Research Conference Proceedings (Vol. 3, pp. 1788-1801)

Development of finite element based defect assessment method for gas pipelines subject to operating condition changes. / Kim, Woosik; Baek, Jonghyeon; Kim, Yun-Jae.

International Gas Research Conference Proceedings. Vol. 3 2011. p. 1788-1801.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kim, W, Baek, J & Kim, Y-J 2011, Development of finite element based defect assessment method for gas pipelines subject to operating condition changes. in International Gas Research Conference Proceedings. vol. 3, pp. 1788-1801, International Gas Union Research Conference 2011, IGRC 2011, Seoul, Korea, Republic of, 11/10/19.
Kim W, Baek J, Kim Y-J. Development of finite element based defect assessment method for gas pipelines subject to operating condition changes. In International Gas Research Conference Proceedings. Vol. 3. 2011. p. 1788-1801
Kim, Woosik ; Baek, Jonghyeon ; Kim, Yun-Jae. / Development of finite element based defect assessment method for gas pipelines subject to operating condition changes. International Gas Research Conference Proceedings. Vol. 3 2011. pp. 1788-1801
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