Analytical Ratchet Limit for Pressurized Pipeline under Cyclic Nonproportional Loadings
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 8, Issue 3
Abstract
Analytical ratchet limits of cylindrical pipelines subjected to several typical cyclic nonproportional loading combinations, such as internal pressure, tension, compression, moment, torsion, and thermal loading in practical engineering, were deduced theoretically according to the noncyclic method. The effects of the axial compression stress and radius ratio on the ratchet limit of structures were investigated intensively. Results revealed that the ratchet limit reduces significantly when axial compression stress is applied, while it clearly increases with the increment of radius ratio. Moreover, several Bree-like diagrams under the corresponding loading conditions of this paper were obtained, which can be used to conveniently estimate the ratchet limit of cylindrical pressure vessels and piping for engineering design.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (51305310), Hubei Provincial Department of Education Science and Technology Research Program (D20161508).
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 8 • Issue 3 • August 2017
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This work is made available under the terms of the Creative Commons Attribution 4.0 International license, http://creativecommons.org/licenses/by/4.0/.
History
Received: Apr 4, 2016
Accepted: Oct 27, 2016
Published online: Jan 24, 2017
Discussion open until: Jun 24, 2017
Published in print: Aug 1, 2017
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