Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study
The variation of crack shape factor (a/c) during propagation has an important role on calculation of the stress intensity factor (SIF), where imprecise estimation of this latter can lead us to an inaccurate prediction of failure probabilities. For the case of external cracked surface pipeline carrie...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2019-06-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2418 |
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| author | Abdelkader Guillal Noureddine Abdelbaki Mohamed el Amine Bensghier Bogdan Kopei Mourad Bettayeb |
| author_facet | Abdelkader Guillal Noureddine Abdelbaki Mohamed el Amine Bensghier Bogdan Kopei Mourad Bettayeb |
| author_sort | Abdelkader Guillal |
| collection | DOAJ |
| description | The variation of crack shape factor (a/c) during propagation has an important role on calculation of the stress intensity factor (SIF), where imprecise estimation of this latter can lead us to an inaccurate prediction of failure probabilities. For the case of external cracked surface pipeline carried oil and gas products, such estimation can results undesired fault decisions like excessive repairs action or inspection planning. In this paper, the structural integrity analysis of pipeline with semi elliptical crack on the external surface is evaluated. Reliability calculations expressed in term of reliability index β are carried out based on Monte Carlo simulation and First Order reliability Method (FORM). The crack shape factors are varied to cover a variety of geometries from shallow to deep cracks while fatigue crack growth is assumed in depth direction. For SIF estimation, surface and deep point are considered. Results of the analysis indicate that for a constant crack depth a/t, the reliability index is strongly affected by a/c ratio and the trend is not similar in deep and surface point for different crack shapes. |
| format | Article |
| id | doaj-art-24f7b1958f9845e8867d164aba0620b7 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-06-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-24f7b1958f9845e8867d164aba0620b72025-01-03T00:39:47ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-06-011349Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric studyAbdelkader Guillal0Noureddine Abdelbaki1Mohamed el Amine Bensghier2Bogdan Kopei3Mourad Bettayeb4Université M'hamed Bougara de BoumerdèsUniversité Mohand Oulhadj de BouiraUniversité M’hamed Bougara de BoumerdèsIvano-Frankivsk National Technical University of Oil and GasUniversité M’hamed Bougara de BoumerdèsThe variation of crack shape factor (a/c) during propagation has an important role on calculation of the stress intensity factor (SIF), where imprecise estimation of this latter can lead us to an inaccurate prediction of failure probabilities. For the case of external cracked surface pipeline carried oil and gas products, such estimation can results undesired fault decisions like excessive repairs action or inspection planning. In this paper, the structural integrity analysis of pipeline with semi elliptical crack on the external surface is evaluated. Reliability calculations expressed in term of reliability index β are carried out based on Monte Carlo simulation and First Order reliability Method (FORM). The crack shape factors are varied to cover a variety of geometries from shallow to deep cracks while fatigue crack growth is assumed in depth direction. For SIF estimation, surface and deep point are considered. Results of the analysis indicate that for a constant crack depth a/t, the reliability index is strongly affected by a/c ratio and the trend is not similar in deep and surface point for different crack shapes.https://www.fracturae.com/index.php/fis/article/view/2418CrackPipelineReliabilityFailure IndexMonte Carlo Simulation |
| spellingShingle | Abdelkader Guillal Noureddine Abdelbaki Mohamed el Amine Bensghier Bogdan Kopei Mourad Bettayeb Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study Fracture and Structural Integrity Crack Pipeline Reliability Failure Index Monte Carlo Simulation |
| title | Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study |
| title_full | Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study |
| title_fullStr | Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study |
| title_full_unstemmed | Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study |
| title_short | Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study |
| title_sort | effect of shape factor on structural reliability analysis of a surface cracked pipeline parametric study |
| topic | Crack Pipeline Reliability Failure Index Monte Carlo Simulation |
| url | https://www.fracturae.com/index.php/fis/article/view/2418 |
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