Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region
In order to study the residual strength of buried pipelines with internal corrosion defects in seasonally frozen soil regions, we established a thermo-mechanical coupling model of a buried pipeline under differential frost heave by using the finite element elastoplastic analysis method. The material...
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/24/12141 |
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| author | Xiaoli Li Guitao Chen Xiaoyan Liu Jing Ji Lianfu Han |
| author_facet | Xiaoli Li Guitao Chen Xiaoyan Liu Jing Ji Lianfu Han |
| author_sort | Xiaoli Li |
| collection | DOAJ |
| description | In order to study the residual strength of buried pipelines with internal corrosion defects in seasonally frozen soil regions, we established a thermo-mechanical coupling model of a buried pipeline under differential frost heave by using the finite element elastoplastic analysis method. The material nonlinearity and geometric nonlinearity were considered as the basis of analysis. Firstly, the location of the maximum Mises equivalent stress in the inner wall of the buried non-corroded pipeline was determined. Furthermore, the residual strength of the buried pipeline with corrosion defects and the stress state of internal corrosion area in the pipeline under different defect parameters was analyzed by the orthogonal design method. Based on the data results of the finite element simulation calculation, the prediction formula of residual strength of buried pipelines with internal corrosion defects was obtained by SPSS (Statistical Product and Service Solutions) fitting. The prediction results were analyzed in comparison with the evaluation results of B31G, DNV RP-F101 and the experimental data of hydraulic blasting. The rationality of the finite element model and the accuracy of the fitting formula were verified. The results show that the effect degree of main factors on residual strength was in order of corrosion depth, corrosion length, and corrosion width. when the corrosion length exceeds 600 mm, which affects the influence degree of residual strength will gradually decrease. the prediction error of the fitting formula is small and the distribution is uniform, it can meet the prediction requirements of failure pressure of buried pipelines with internal corrosion defects in seasonally frozen soil regions. This method may provide some useful theoretical reference for the simulation real-time monitoring and safety analysis in the pipeline operation stage. |
| first_indexed | 2024-03-10T04:37:08Z |
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| id | doaj.art-e6166d834db34ffab98692c61de47b25 |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T04:37:08Z |
| publishDate | 2021-12-01 |
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| spelling | doaj.art-e6166d834db34ffab98692c61de47b252023-11-23T03:43:49ZengMDPI AGApplied Sciences2076-34172021-12-0111241214110.3390/app112412141Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil RegionXiaoli Li0Guitao Chen1Xiaoyan Liu2Jing Ji3Lianfu Han4Department of Civil Engineering, Northeast Petroleum University, Daqing 163318, ChinaDepartment of Civil Engineering, Northeast Petroleum University, Daqing 163318, ChinaDepartment of Civil Engineering, Northeast Petroleum University, Daqing 163318, ChinaDepartment of Civil Engineering, Northeast Petroleum University, Daqing 163318, ChinaSchool of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, ChinaIn order to study the residual strength of buried pipelines with internal corrosion defects in seasonally frozen soil regions, we established a thermo-mechanical coupling model of a buried pipeline under differential frost heave by using the finite element elastoplastic analysis method. The material nonlinearity and geometric nonlinearity were considered as the basis of analysis. Firstly, the location of the maximum Mises equivalent stress in the inner wall of the buried non-corroded pipeline was determined. Furthermore, the residual strength of the buried pipeline with corrosion defects and the stress state of internal corrosion area in the pipeline under different defect parameters was analyzed by the orthogonal design method. Based on the data results of the finite element simulation calculation, the prediction formula of residual strength of buried pipelines with internal corrosion defects was obtained by SPSS (Statistical Product and Service Solutions) fitting. The prediction results were analyzed in comparison with the evaluation results of B31G, DNV RP-F101 and the experimental data of hydraulic blasting. The rationality of the finite element model and the accuracy of the fitting formula were verified. The results show that the effect degree of main factors on residual strength was in order of corrosion depth, corrosion length, and corrosion width. when the corrosion length exceeds 600 mm, which affects the influence degree of residual strength will gradually decrease. the prediction error of the fitting formula is small and the distribution is uniform, it can meet the prediction requirements of failure pressure of buried pipelines with internal corrosion defects in seasonally frozen soil regions. This method may provide some useful theoretical reference for the simulation real-time monitoring and safety analysis in the pipeline operation stage.https://www.mdpi.com/2076-3417/11/24/12141internal corrosiondifferential frost heaveorthogonal designresidual strengthfitting formula |
| spellingShingle | Xiaoli Li Guitao Chen Xiaoyan Liu Jing Ji Lianfu Han Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region Applied Sciences internal corrosion differential frost heave orthogonal design residual strength fitting formula |
| title | Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region |
| title_full | Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region |
| title_fullStr | Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region |
| title_full_unstemmed | Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region |
| title_short | Analysis and Evaluation on Residual Strength of Pipelines with Internal Corrosion Defects in Seasonal Frozen Soil Region |
| title_sort | analysis and evaluation on residual strength of pipelines with internal corrosion defects in seasonal frozen soil region |
| topic | internal corrosion differential frost heave orthogonal design residual strength fitting formula |
| url | https://www.mdpi.com/2076-3417/11/24/12141 |
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