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Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending

Ye, Hao; Qian, Jinyuan LU ; Yan, Sunting; Jiang, Chenghang; Wei, Lin and Jin, Zhi Jiang (2016) In International Journal of Mechanical Sciences 106. p.319-330
Abstract

By assuming the neutral axis is perpendicular to the bending plane, this paper presents a general analytical solution to predict the limit bending moment for pipes with two inner surface circumferential flaws under combined internal pressure and bending moment. The circumferential stress caused by internal pressure is taken into account through Mises yield criterion. Based on the general solution, expressions for symmetrical and unsymmetrical bending with two flaws of the same size are proposed. Then the influence of perpendicularity assumption is discussed and it demonstrates that the deviation caused by perpendicularity assumption is negligible. Finite element analyses and experiments are both carried out. The results calculated by... (More)

By assuming the neutral axis is perpendicular to the bending plane, this paper presents a general analytical solution to predict the limit bending moment for pipes with two inner surface circumferential flaws under combined internal pressure and bending moment. The circumferential stress caused by internal pressure is taken into account through Mises yield criterion. Based on the general solution, expressions for symmetrical and unsymmetrical bending with two flaws of the same size are proposed. Then the influence of perpendicularity assumption is discussed and it demonstrates that the deviation caused by perpendicularity assumption is negligible. Finite element analyses and experiments are both carried out. The results calculated by proposed expressions are found to be in good agreement with both numerical results and experimental ones. The effect of several parameters on the limit bending moment is also studied. Results reveal that circumferential stress caused by internal pressure has important influence on bending moment, and should be taken into account.

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Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Circumferential flaws, Internal pressure, Limit bending moment, Pipe
in
International Journal of Mechanical Sciences
volume
106
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:84954127868
ISSN
0020-7403
DOI
10.1016/j.ijmecsci.2015.12.024
language
English
LU publication?
no
id
bfe2afb0-1a9d-4e8d-9b1a-09dbafc9c6e4
date added to LUP
2016-11-11 17:08:25
date last changed
2017-08-13 05:00:21
@article{bfe2afb0-1a9d-4e8d-9b1a-09dbafc9c6e4,
  abstract     = {<p>By assuming the neutral axis is perpendicular to the bending plane, this paper presents a general analytical solution to predict the limit bending moment for pipes with two inner surface circumferential flaws under combined internal pressure and bending moment. The circumferential stress caused by internal pressure is taken into account through Mises yield criterion. Based on the general solution, expressions for symmetrical and unsymmetrical bending with two flaws of the same size are proposed. Then the influence of perpendicularity assumption is discussed and it demonstrates that the deviation caused by perpendicularity assumption is negligible. Finite element analyses and experiments are both carried out. The results calculated by proposed expressions are found to be in good agreement with both numerical results and experimental ones. The effect of several parameters on the limit bending moment is also studied. Results reveal that circumferential stress caused by internal pressure has important influence on bending moment, and should be taken into account.</p>},
  author       = {Ye, Hao and Qian, Jinyuan and Yan, Sunting and Jiang, Chenghang and Wei, Lin and Jin, Zhi Jiang},
  issn         = {0020-7403},
  keyword      = {Circumferential flaws,Internal pressure,Limit bending moment,Pipe},
  language     = {eng},
  month        = {02},
  pages        = {319--330},
  publisher    = {Elsevier},
  series       = {International Journal of Mechanical Sciences},
  title        = {Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending},
  url          = {http://dx.doi.org/10.1016/j.ijmecsci.2015.12.024},
  volume       = {106},
  year         = {2016},
}