The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load

Hartono Yudo, Takao Yoshikawa

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

Abstract

The effect of initial imperfection on the buckling strength of a straight pipe under bending has been investigated by nonlinear FEA, considering the effect of a cross sectional oval deformation by changing the variables of pipes, that is, L/D varying from about 2.5 to 20 and D/t varying from about 50 to 200. Furthermore also the buckling strength of curved pipes (D/t = 200) have been investigated by changing R/D from 50 to 200. Not only the elastic buckling but also the elasto-plastic buckling was investigated. From the numerical results, the followings were found. The buckling strength reduced more in longer pipes than shorter pipes due to pre-buckling oval deformation. But, the reduction of buckling strength due to imperfection is larger in shorter pipes than in longer pipes. Moreover, the buckling strength reduces more by the imperfection of buckling mode than by that of oval mode. The effect of imperfection on buckling strength in plastic region was smaller than in elastic region. The buckling moment of curved pipes reduces more when the curvature of pipe increases in both original and imperfect pipes, especially for longer pipes.

Original languageEnglish
Title of host publicationProceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan
PublisherInternational Society of Offshore and Polar Engineers
Pages64-71
Number of pages8
ISBN (Print)9781880653913
Publication statusPublished - Jan 1 2014
Event24th International Ocean and Polar Engineering Conference, ISOPE 2014 Busan - Busan, Korea, Republic of
Duration: Jun 15 2014Jun 20 2014

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other24th International Ocean and Polar Engineering Conference, ISOPE 2014 Busan
CountryKorea, Republic of
CityBusan
Period6/15/146/20/14

Fingerprint

Buckling
Pipe
Defects
Plastics
Finite element method

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

Cite this

Yudo, H., & Yoshikawa, T. (2014). The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load. In Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan (pp. 64-71). (Proceedings of the International Offshore and Polar Engineering Conference). International Society of Offshore and Polar Engineers.

The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load. / Yudo, Hartono; Yoshikawa, Takao.

Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan. International Society of Offshore and Polar Engineers, 2014. p. 64-71 (Proceedings of the International Offshore and Polar Engineering Conference).

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

Yudo, H & Yoshikawa, T 2014, The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load. in Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan. Proceedings of the International Offshore and Polar Engineering Conference, International Society of Offshore and Polar Engineers, pp. 64-71, 24th International Ocean and Polar Engineering Conference, ISOPE 2014 Busan, Busan, Korea, Republic of, 6/15/14.
Yudo H, Yoshikawa T. The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load. In Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan. International Society of Offshore and Polar Engineers. 2014. p. 64-71. (Proceedings of the International Offshore and Polar Engineering Conference).
Yudo, Hartono ; Yoshikawa, Takao. / The effect of initial imperfection on buckling strength for straight and curved pipe under pure bending load. Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan. International Society of Offshore and Polar Engineers, 2014. pp. 64-71 (Proceedings of the International Offshore and Polar Engineering Conference).
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