A numerical study of damage caused by combined pitting corrosion and axial stress in steel pipes

Ali Rajabipour, Robert E. Melchers

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Localized pipe wall damage accounts for many failures. Numerical modelling of pipes under increasing axial load and constant internal pressure when there is corrosion pits on the exterior surface of the pipe is reported herein. It is shown that for the assumed ideal elastic-plastic material the shape and volume of the plastic field depend on pit depth and its geometry. Pipe wall fracture around a pit can be associated with a critical plastic section. The results reported herein should be relevant for estimating of the risk of perforation and of loss of contents for steel pipes under different loading.

Original languageEnglish
Pages (from-to)292-301
Number of pages10
JournalCorrosion Science
Volume76
Issue numberNovember
DOIs
Publication statusPublished - 1 Nov 2013
Externally publishedYes

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Steel pipe
Pitting
Pipe
Corrosion
Plastics
Axial loads
Geometry

Cite this

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A numerical study of damage caused by combined pitting corrosion and axial stress in steel pipes. / Rajabipour, Ali; Melchers, Robert E.

In: Corrosion Science, Vol. 76, No. November, 01.11.2013, p. 292-301.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Rajabipour, Ali

AU - Melchers, Robert E.

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N2 - Localized pipe wall damage accounts for many failures. Numerical modelling of pipes under increasing axial load and constant internal pressure when there is corrosion pits on the exterior surface of the pipe is reported herein. It is shown that for the assumed ideal elastic-plastic material the shape and volume of the plastic field depend on pit depth and its geometry. Pipe wall fracture around a pit can be associated with a critical plastic section. The results reported herein should be relevant for estimating of the risk of perforation and of loss of contents for steel pipes under different loading.

AB - Localized pipe wall damage accounts for many failures. Numerical modelling of pipes under increasing axial load and constant internal pressure when there is corrosion pits on the exterior surface of the pipe is reported herein. It is shown that for the assumed ideal elastic-plastic material the shape and volume of the plastic field depend on pit depth and its geometry. Pipe wall fracture around a pit can be associated with a critical plastic section. The results reported herein should be relevant for estimating of the risk of perforation and of loss of contents for steel pipes under different loading.

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