期刊
ENGINEERING FAILURE ANALYSIS
卷 140, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2022.106510
关键词
Pipe-in-pipe systems; Performance objectives; Failure modes; Analytical Hierarchy Process
资金
- Advanced Research Projects Agency-Energy (ARPA-E) , U.S. Department of Energy [DE-AR0001327]
This study analyzes and models the failure modes of pipe-in-pipe systems and investigates the effects of thickness and elastic modulus on these modes. The study reveals that lateral deformation is the most critical failure mode, followed by internal pressure. The results provide useful design tools for pipeline repair.
Different failure modes should be carefully analyzed to effectively design the pipe-in-pipe (PIP) repair systems to rehabilitate natural gas and water pipelines in place and in service. This study characterizes the failure modes through analytical and numerical modelling of the different performance objectives to have a comprehensive understanding of the overall behavior of PIP systems with a range of thicknesses and elastic moduli. It focused on assessing the structural performance of PIP systems under different load actions including vibration/fatigue due to traffic loads, lateral deformation, cross-section ovalization, axial stresses and thermal deformation, in-ternal pressure, and impact. The results of the analyses showed that the thickness and elastic modulus significantly affect the failure modes of PIP systems. The implemented Analytical Hi-erarchy Process (AHP) suggested that lateral deformation is the most critical failure mode fol-lowed by internal pressure based on global priority as well as both criteria (thickness and elastic modulus) when the design pressure is 200 psi with the cross-section ovalization the least critical failure mode of the PIP systems. The results of this study provide useful predictive modelling techniques and preliminary design tools for PIP systems for new material systems development and/or evaluation of the suitability of the available PIP systems for pipeline repair.
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