Fatigue analysis of metallic-plastic-valve pipeline systems: a numerical case study
Date
2023
Authors
Lee, J.S.
Gong, J.
Zeng, W.
Lambert, M.F.
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Conference paper
Citation
Proceedings of the 14th International Conference on Pressure Surges, 2023, pp.585-597
Statement of Responsibility
Ji-Sung Lee, Jinzhe Gong, Wei Zeng and Martin F. Lambert
Conference Name
14th International Conference on Pressure Surges (12 Apr 2023 - 14 Apr 2023 : Eindhoven, The Netherlands)
Abstract
Metallic and plastic pipe sections are often mixed in use in water distribution systems. The interface between metallic and plastic pipe sections is typically associated with a significant change in hydraulic impedance. Multiple impedance changes in a pipeline system may induce repeated pressure reflections during hydraulic transient events, which may accelerate the fatigue process. This research simulates the hydraulic transient pressure response of a metallic-plastic series pipeline system using the method of characteristics. The impact on the fatigue lifetime of the plastic section is then investigated by adopting a fatigue analysis model based on the stress-life method. The results show that the plastic section in a metallic-plastic-valve pipeline configuration can have a significantly reduced fatigue lifetime relative to the corresponding plastic-valve configuration (a plastic pipe with a valve at one end).
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© TU/e 2023 Pressure Surges 14. Open Access Proceedings.