Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe
The mechanical state of the process zone at the crack-tip is one of the main factors that affect crack initiation and growth in the long-term safe operation of oil and gas pipelines. Many tests showed that the stress and strain fields in the fracture-tip process zone can be used to define the crack...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co. Ltd.
2022-03-01
|
| Series: | Journal of Pipeline Science and Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667143321000743 |
| _version_ | 1819025555202244608 |
|---|---|
| author | Shaohua Dong Feng Li Donghua Peng Hang Zhang Shiwen Guo Haotian Wei Xuan Sun Yasir Mukhtar |
| author_facet | Shaohua Dong Feng Li Donghua Peng Hang Zhang Shiwen Guo Haotian Wei Xuan Sun Yasir Mukhtar |
| author_sort | Shaohua Dong |
| collection | DOAJ |
| description | The mechanical state of the process zone at the crack-tip is one of the main factors that affect crack initiation and growth in the long-term safe operation of oil and gas pipelines. Many tests showed that the stress and strain fields in the fracture-tip process zone can be used to define the crack propagation behavior. The goal of this paper is to improve the Hutchinson, Rice, and Rosengren (HRR) model by using cubic asymptotic polynomials to describe the stress-strain field at the crack-tip, as well as to validate the model by a thorough comparison with full-scale burst test results that account for the fracture zone's mechanical properties. The asymptotic polynomial elastic viscoplastic distribution model of stress-strain displacement field at the crack-tip is developed, and the HRR method is modified reasonably. The crack propagation test of the X80 steel pipeline in the burst test site is carried out. Experimentally, the distribution of stress and strain field in the crack-tip process zone of the X80 testing pipeline is obtained, then compared with the theoretical solution. The final results showed consistency, and the elastic viscoplastic model matched well with the running fracture test data for the X80 gas pipeline. Besides, the stress and strain fields distribution in the crack-tip process zone is verified through the full-scale test of the X80 steel pipeline, which provides a theoretical basis for the integrity evaluation of the steel pipeline. |
| first_indexed | 2024-12-21T05:12:32Z |
| format | Article |
| id | doaj.art-32834d9b39b44069aa475c1b63cc0186 |
| institution | Directory Open Access Journal |
| issn | 2667-1433 |
| language | English |
| last_indexed | 2024-12-21T05:12:32Z |
| publishDate | 2022-03-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Journal of Pipeline Science and Engineering |
| spelling | doaj.art-32834d9b39b44069aa475c1b63cc01862022-12-21T19:15:01ZengKeAi Communications Co. Ltd.Journal of Pipeline Science and Engineering2667-14332022-03-01213951Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipeShaohua Dong0Feng Li1Donghua Peng2Hang Zhang3Shiwen Guo4Haotian Wei5Xuan Sun6Yasir Mukhtar7College of Safety & Ocean Engineering, China University of Petroleum, Beijing, 102249, China; Corresponding author.College of Safety & Ocean Engineering, China University of Petroleum, Beijing, 102249, ChinaPipeChina Beijing Pipeline Co.,Ltd., Beijing, 100000, ChinaCollege of mechanical & storage engineering, China University of Petroleum, 102249, ChinaCollege of Safety & Ocean Engineering, China University of Petroleum, Beijing, 102249, ChinaCollege of Safety & Ocean Engineering, China University of Petroleum, Beijing, 102249, ChinaBeijing Aolanshi Technology Co., Ltd., Beijing 102249 ChinaCollege of Safety & Ocean Engineering, China University of Petroleum, Beijing, 102249, China; Sudan University of Science Technology, College of Engineering SudanThe mechanical state of the process zone at the crack-tip is one of the main factors that affect crack initiation and growth in the long-term safe operation of oil and gas pipelines. Many tests showed that the stress and strain fields in the fracture-tip process zone can be used to define the crack propagation behavior. The goal of this paper is to improve the Hutchinson, Rice, and Rosengren (HRR) model by using cubic asymptotic polynomials to describe the stress-strain field at the crack-tip, as well as to validate the model by a thorough comparison with full-scale burst test results that account for the fracture zone's mechanical properties. The asymptotic polynomial elastic viscoplastic distribution model of stress-strain displacement field at the crack-tip is developed, and the HRR method is modified reasonably. The crack propagation test of the X80 steel pipeline in the burst test site is carried out. Experimentally, the distribution of stress and strain field in the crack-tip process zone of the X80 testing pipeline is obtained, then compared with the theoretical solution. The final results showed consistency, and the elastic viscoplastic model matched well with the running fracture test data for the X80 gas pipeline. Besides, the stress and strain fields distribution in the crack-tip process zone is verified through the full-scale test of the X80 steel pipeline, which provides a theoretical basis for the integrity evaluation of the steel pipeline.http://www.sciencedirect.com/science/article/pii/S2667143321000743X80 steel pipelineCrack-tip process zoneElastic viscoplasticityStress-strain fieldHRR model |
| spellingShingle | Shaohua Dong Feng Li Donghua Peng Hang Zhang Shiwen Guo Haotian Wei Xuan Sun Yasir Mukhtar Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe Journal of Pipeline Science and Engineering X80 steel pipeline Crack-tip process zone Elastic viscoplasticity Stress-strain field HRR model |
| title | Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe |
| title_full | Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe |
| title_fullStr | Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe |
| title_full_unstemmed | Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe |
| title_short | Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe |
| title_sort | strain model and experimental study of elastic viscoplastic for crack tip zone of x80 steel pipe |
| topic | X80 steel pipeline Crack-tip process zone Elastic viscoplasticity Stress-strain field HRR model |
| url | http://www.sciencedirect.com/science/article/pii/S2667143321000743 |
| work_keys_str_mv | AT shaohuadong strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT fengli strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT donghuapeng strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT hangzhang strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT shiwenguo strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT haotianwei strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT xuansun strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe AT yasirmukhtar strainmodelandexperimentalstudyofelasticviscoplasticforcracktipzoneofx80steelpipe |