Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes
Residual stress is generated during the production process. It can significantly affect the mechanical performance of pressurized polymer pipes. In this paper, six polyethylene (PE) pipes, including three high-density PEs (HDPE) and three medium-density PEs (MDPE) provided by different suppliers, we...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/7/1458 |
| _version_ | 1797437923367321600 |
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| author | Na Tan Liyang Lin Tao Deng Yongwu Dong |
| author_facet | Na Tan Liyang Lin Tao Deng Yongwu Dong |
| author_sort | Na Tan |
| collection | DOAJ |
| description | Residual stress is generated during the production process. It can significantly affect the mechanical performance of pressurized polymer pipes. In this paper, six polyethylene (PE) pipes, including three high-density PEs (HDPE) and three medium-density PEs (MDPE) provided by different suppliers, were tested using a one-slit-ring method to measure the residual stress distribution along the hoop direction. Finite element (FE) simulation and mechanical testing were also employed in an iteration process to obtain the mechanical parameters of the six PE pipes. For the same PE pipe code from different suppliers, the results show that the magnitude of the residual hoop stress can be very different, resulting in different mechanical behaviors. In addition, the results are proposed to explain the scenario that was reported previously, i.e., the different critical quasi-static stress (the time-independent stress) levels of the PE pipes with the same pipe code. Since the quasi-static stress is expected to dominate the long-term behavior of the PE pipes, it is of great importance to carefully consider the effect of the residual stress on the determination of the quasi-static stress. |
| first_indexed | 2024-03-09T11:29:33Z |
| format | Article |
| id | doaj.art-79be228bf8aa414ab10cce3758965059 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T11:29:33Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-79be228bf8aa414ab10cce37589650592023-11-30T23:54:44ZengMDPI AGPolymers2073-43602022-04-01147145810.3390/polym14071458Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene PipesNa Tan0Liyang Lin1Tao Deng2Yongwu Dong3School of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, ChinaResidual stress is generated during the production process. It can significantly affect the mechanical performance of pressurized polymer pipes. In this paper, six polyethylene (PE) pipes, including three high-density PEs (HDPE) and three medium-density PEs (MDPE) provided by different suppliers, were tested using a one-slit-ring method to measure the residual stress distribution along the hoop direction. Finite element (FE) simulation and mechanical testing were also employed in an iteration process to obtain the mechanical parameters of the six PE pipes. For the same PE pipe code from different suppliers, the results show that the magnitude of the residual hoop stress can be very different, resulting in different mechanical behaviors. In addition, the results are proposed to explain the scenario that was reported previously, i.e., the different critical quasi-static stress (the time-independent stress) levels of the PE pipes with the same pipe code. Since the quasi-static stress is expected to dominate the long-term behavior of the PE pipes, it is of great importance to carefully consider the effect of the residual stress on the determination of the quasi-static stress.https://www.mdpi.com/2073-4360/14/7/1458residual stressmechanical testingpolyethylenelong-term performance |
| spellingShingle | Na Tan Liyang Lin Tao Deng Yongwu Dong Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes Polymers residual stress mechanical testing polyethylene long-term performance |
| title | Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes |
| title_full | Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes |
| title_fullStr | Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes |
| title_full_unstemmed | Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes |
| title_short | Evaluating the Residual Stress and Its Effect on the Quasi-Static Stress in Polyethylene Pipes |
| title_sort | evaluating the residual stress and its effect on the quasi static stress in polyethylene pipes |
| topic | residual stress mechanical testing polyethylene long-term performance |
| url | https://www.mdpi.com/2073-4360/14/7/1458 |
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