Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements
The present paper addresses the mechanical behaviors and failure mechanisms of buried polyethylene (PE) pipes crossing active strike slip tectonic faults based on numerical simulation of the nonlinear response of the soil-pipeline system. The developed finite element (FE) model is first verified thr...
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| Format: | Article |
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MDPI AG
2022-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/5/987 |
| _version_ | 1797473997176176640 |
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| author | Lin Li Liang Qiao Junming Fan Yi Zhang |
| author_facet | Lin Li Liang Qiao Junming Fan Yi Zhang |
| author_sort | Lin Li |
| collection | DOAJ |
| description | The present paper addresses the mechanical behaviors and failure mechanisms of buried polyethylene (PE) pipes crossing active strike slip tectonic faults based on numerical simulation of the nonlinear response of the soil-pipeline system. The developed finite element (FE) model is first verified through comparing the simulation results with those from large-scale tests and good agreement between simulation and experimental measurements is obtained. The FE model is then applied to investigate the effects of fault crossing angle, pipe and soil properties on the mechanical behavior of PE pipe. The results indicate that the PE pipe crossing negative fault angles is primarily subjected to compression and bending, thus exhibits the phenomenon of buckling. With the increase of crossing angle, there is an increase of the axial strain and the maximum Mises stress in the buckled cross section, and a decrease of the distance between the buckling position and the fault plane. While for positive crossing angles, the PE pipe is mainly subjected to tension and relatively small bending. Increasing the crossing angle causes an increase in bending strain and a decrease in the axial strain. In addition, when the fault moving speed is slower, the axial strain and bending strain are larger, whereas the maximum Mises stress in the buckled cross section and the distance between the buckled position and the fault plane are reduced. Furthermore, the most severe deformation of the pipe is observed when it is buried in the sandy soil, followed by cohesive soil and loess soil. |
| first_indexed | 2024-03-09T20:24:08Z |
| format | Article |
| id | doaj.art-3da90cf610de4cb7a8b8248f0e0eb468 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T20:24:08Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-3da90cf610de4cb7a8b8248f0e0eb4682023-11-23T23:39:22ZengMDPI AGPolymers2073-43602022-02-0114598710.3390/polym14050987Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault MovementsLin Li0Liang Qiao1Junming Fan2Yi Zhang3School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaShenzhen Gas Corporation Ltd., Shenzhen 518040, ChinaShenzhen Gas Corporation Ltd., Shenzhen 518040, ChinaDepartment of Engineering Mechanics, College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaThe present paper addresses the mechanical behaviors and failure mechanisms of buried polyethylene (PE) pipes crossing active strike slip tectonic faults based on numerical simulation of the nonlinear response of the soil-pipeline system. The developed finite element (FE) model is first verified through comparing the simulation results with those from large-scale tests and good agreement between simulation and experimental measurements is obtained. The FE model is then applied to investigate the effects of fault crossing angle, pipe and soil properties on the mechanical behavior of PE pipe. The results indicate that the PE pipe crossing negative fault angles is primarily subjected to compression and bending, thus exhibits the phenomenon of buckling. With the increase of crossing angle, there is an increase of the axial strain and the maximum Mises stress in the buckled cross section, and a decrease of the distance between the buckling position and the fault plane. While for positive crossing angles, the PE pipe is mainly subjected to tension and relatively small bending. Increasing the crossing angle causes an increase in bending strain and a decrease in the axial strain. In addition, when the fault moving speed is slower, the axial strain and bending strain are larger, whereas the maximum Mises stress in the buckled cross section and the distance between the buckled position and the fault plane are reduced. Furthermore, the most severe deformation of the pipe is observed when it is buried in the sandy soil, followed by cohesive soil and loess soil.https://www.mdpi.com/2073-4360/14/5/987PE pipestrike strip faultFE simulation |
| spellingShingle | Lin Li Liang Qiao Junming Fan Yi Zhang Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements Polymers PE pipe strike strip fault FE simulation |
| title | Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements |
| title_full | Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements |
| title_fullStr | Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements |
| title_full_unstemmed | Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements |
| title_short | Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements |
| title_sort | mechanical behavior of polyethylene pipes under strike slip fault movements |
| topic | PE pipe strike strip fault FE simulation |
| url | https://www.mdpi.com/2073-4360/14/5/987 |
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