NDLI: Fatigue Life Analysis of Steel Pipelines With Plain Dents Under Cyclic Internal Pressure

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Pinheiro, Bianca De Carvalho Pasqualino, Ilson Paranhos Cunha, Se´rgio Barros Da
Copyright Year	2008
Abstract	This work is within an ongoing study, which aims to propose a new methodology for fatigue life analysis of steel pipelines with plain dents under cyclic internal pressure. This methodology follows the current high cycle fatigue theory and employs stress concentration factors induced by plain dents to modify standard S-N curves. A previously developed and validated finite element model is extended to generate stress concentration factors for longitudinal and transverse dents, in addition to spherical dents. Several finite element analyses are carried out in a parametric study to evaluate stress concentration factors induced by the three dent types studied: spherical, longitudinal and transverse dents. Analytical expressions are developed to estimate stress concentration factors for these three dent types as function of pipe and dent geometric parameters. Small-scale fatigue tests are conducted to evaluate the finite life behavior of dented steel pipes under cyclic internal pressure. The methodology is validated in view of the fatigue tests results. Including expressions to estimate stress concentration factors for three different dent types (spherical, longitudinal and transverse dents), the proposed methodology can then be used for fatigue life analysis of dented steel pipelines under cyclic internal pressure.
Sponsorship	International Petroleum Technology Institute and the Pipeline Division
Starting Page	629
Ending Page	638
Page Count	10
File Format	PDF
ISBN	9780791848609
DOI	10.1115/IPC2008-64690
e-ISBN	9780791838358
Volume Number	2008 7th International Pipeline Conference, Volume 4
Conference Proceedings	2008 7th International Pipeline Conference
Language	English
Publisher Date	2008-09-29
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Fatigue life Stress concentration Fatigue testing Finite element model Pipelines High cycle fatigue Finite element analysis Steel Pressure Pipes
Content Type	Text
Resource Type	Article

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