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A platform for research: civil engineering, architecture and urbanism
Time-variant burst strength of pipe with corrosion defects considering mechano-electrochemical interaction
https://orcid.org/0000-0002-6708-9885
https://orcid.org/0000-0002-5325-1917
Abstract This study aims at assessing the time-variant burst strength of pipe with corrosion defects under high internal pressure. A new numerical model was developed, where the mechano-electrochemical interaction was considered in a simplified manner. The damage evolution of corrosion, which was governed by a stress corrosion model, was realized by a user defined UMESHMOTION subroutine. The time-variant corrosion morphology and burst strength can be obtained using the numerical model. The proposed method avoids the disadvantages of the conventional method, where the damage form and size at a given moment are presumed and history-independent. Based on this simplified method, the effect of a single and two adjacent local corrosion defects on the burst strength of the pipe was investigated. Moreover, a new method was proposed that can consider the time-variant reliability of the pipe along with the randomness of the corrosion rate, geometry, and material strength. The predicted value of the deterministic method was also compared with that obtained by the stochastic method. Furthermore, systematic parametric studies were also conducted.
Highlights A stress-corrosion model was combined into the numerical model. The time-variant profile and burst strength of corroded pipe was obtained by UMESHMOTION subroutine. The interaction between two local defects were investigated. A random corrosion modeling scheme was proposed.
Time-variant burst strength of pipe with corrosion defects considering mechano-electrochemical interaction
https://orcid.org/0000-0002-6708-9885
https://orcid.org/0000-0002-5325-1917
Abstract This study aims at assessing the time-variant burst strength of pipe with corrosion defects under high internal pressure. A new numerical model was developed, where the mechano-electrochemical interaction was considered in a simplified manner. The damage evolution of corrosion, which was governed by a stress corrosion model, was realized by a user defined UMESHMOTION subroutine. The time-variant corrosion morphology and burst strength can be obtained using the numerical model. The proposed method avoids the disadvantages of the conventional method, where the damage form and size at a given moment are presumed and history-independent. Based on this simplified method, the effect of a single and two adjacent local corrosion defects on the burst strength of the pipe was investigated. Moreover, a new method was proposed that can consider the time-variant reliability of the pipe along with the randomness of the corrosion rate, geometry, and material strength. The predicted value of the deterministic method was also compared with that obtained by the stochastic method. Furthermore, systematic parametric studies were also conducted.
Highlights A stress-corrosion model was combined into the numerical model. The time-variant profile and burst strength of corroded pipe was obtained by UMESHMOTION subroutine. The interaction between two local defects were investigated. A random corrosion modeling scheme was proposed.
Time-variant burst strength of pipe with corrosion defects considering mechano-electrochemical interaction
https://orcid.org/0000-0002-6708-9885
https://orcid.org/0000-0002-5325-1917
Abstract This study aims at assessing the time-variant burst strength of pipe with corrosion defects under high internal pressure. A new numerical model was developed, where the mechano-electrochemical interaction was considered in a simplified manner. The damage evolution of corrosion, which was governed by a stress corrosion model, was realized by a user defined UMESHMOTION subroutine. The time-variant corrosion morphology and burst strength can be obtained using the numerical model. The proposed method avoids the disadvantages of the conventional method, where the damage form and size at a given moment are presumed and history-independent. Based on this simplified method, the effect of a single and two adjacent local corrosion defects on the burst strength of the pipe was investigated. Moreover, a new method was proposed that can consider the time-variant reliability of the pipe along with the randomness of the corrosion rate, geometry, and material strength. The predicted value of the deterministic method was also compared with that obtained by the stochastic method. Furthermore, systematic parametric studies were also conducted.
Highlights A stress-corrosion model was combined into the numerical model. The time-variant profile and burst strength of corroded pipe was obtained by UMESHMOTION subroutine. The interaction between two local defects were investigated. A random corrosion modeling scheme was proposed.
Time-variant burst strength of pipe with corrosion defects considering mechano-electrochemical interaction
Wang, Huakun (author) / Yu, Yang (author) / Xu, Weipeng (author) / Li, Zhenmian (author) / Yu, Sizhe (author)
Thin-Walled Structures ; 169
2021-09-20
Article (Journal)
Electronic Resource
English
Mechano-electrochemical effect between erosion and corrosion
| British Library Online Contents | 2003