Effect of accurate prediction of real-time crack tip position on dynamic crack behaviors in gas pipeline

Zhen, Ying; Zu, Yizhen; Cao, Yanjie; Niu, Ruiyan

doi:10.1016/j.jngse.2021.104136

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…The definition of CTOA in a pipeline is illustrated in Fig. 4, wherex = 5 mm 19 . The simulation and experimental CTOA evolutions for the pipeline are shown in Fig.…”

Section: Comparison Of Simulation and Experimental Resultsmentioning

confidence: 99%

“…In the author's previous work, a simulation method for dynamic crack propagation in natural gas pipelines with the real-time prediction of crack tip position was proposed 19,20 . In this method, the dynamic crack propagation of pipelines was achieved by element deletion with the Gurson-Tvergaard-Needleman (GTN) model, the decompression behavior of natural gas after the pipeline cracking was described by the gas decompression model which was fitted based on full-scale burst test data.…”

Section: The Simulation Of Pipeline Ctoa 21 Simulation Methods Of Dyn...mentioning

confidence: 99%

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Study on CTOA evolutions during dynamic crack propagation of pipelines

Cao

Zhen

Liu

et al. 2022

Preprint

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：Crack Tip Opening Angle (CTOA) is considered and has been attempted to be used as a fracture parameter to describe the crack arrest toughness of ductile steel gas pipelines. However, its evolution and influencing factors during pipeline dynamic crack propagation are still unclear, and its use as a crack arrest toughness parameter similar to the Charpy impact toughness also lacks theoretical support. In view of the above problems, this paper reproduces the full-scale test with the help of the numerical simulation method for pipeline dynamic crack propagation. Comparing the numerical simulation results with the experimental ones, it is proved that the numerical model is reliable in studying the pipeline CTOA evolutions. On this basis, this paper systematically studies the evolution laws of CTOA in the process of dynamic crack propagation and arrest for natural gas pipelines, and clarifies the effects of the following factors on CTOA values, including the design factor, geometric dimensions, inertia backfill effect and material property of pipeline steel, et al. The results show that the critical CTOA (CTOA ) of a pipeline is independent of the design factor, the pressure decompression, and the large change in the crack velocity, and is also not sensitive to the pipe strength, pipe wall thickness, and the inertial effect of soil, but only related to the pipe diameter and pipe toughness. The above conclusions show that it is reasonable to use CTOA as the crack arrest toughness parameter and has laid a foundation for the subsequent establishment of the crack arrest control method for natural pipelines based on CTOA .

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“…The definition of CTOA in a pipeline is illustrated in Fig. 4, wherex = 5 mm 19 . The simulation and experimental CTOA evolutions for the pipeline are shown in Fig.…”

Section: Comparison Of Simulation and Experimental Resultsmentioning

confidence: 99%

Section: The Simulation Of Pipeline Ctoa 21 Simulation Methods Of Dyn...mentioning

confidence: 99%

Study on CTOA evolutions during dynamic crack propagation of pipelines

Cao

Zhen

Liu

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…In the author's previous work, a simulation method for dynamic crack propagation in natural gas pipelines with the real-time prediction of crack tip position was proposed. 20,21 In this method, the dynamic crack propagation of pipelines was achieved by element deletion with the Gurson-Tvergaard-Needleman (GTN) model; the decompression behavior of natural gas after the pipeline cracking was described by the gas decompression model, which was fitted based on full-scale burst test data. An iterative loading method incorporating real-time prediction of crack tip position was proposed to realize the interaction between crack propagation and gas decompression.…”

Section: Simulation Methods Of Dynamic Crack Propagation In Natural G...mentioning

confidence: 99%

Study on crack tip opening angle evolutions during dynamic crack propagation of pipelines

Zhen

Liu

Cao

et al. 2023

Fatigue Fract Eng Mat Struct

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Crack tip opening angle (CTOA) has been used to describe the arrest toughness of high‐grade pipelines. However, its evolutions and influencing factors during pipeline crack propagation are unclear. In view of this, this paper reproduces the full‐scale test using a numerical simulation method that is proven to be reliable. On this basis, the evolutions of CTOA during the dynamic crack propagation of the pipeline are systematically studied, and the effects on CTOA values are clarified. The results show that the critical CTOA of a pipeline is independent of the design factor, the pressure decompression, and the large change in the crack velocity and is also not sensitive to the pipe strength, pipe wall thickness, and the inertial effect of soil, but only related to the pipe diameter and pipe toughness. The above conclusions have laid a foundation for the subsequent establishment of the arrest control method for natural pipelines based on CTOA.

show abstract

Prevention of natural gas pipeline cracking

Xi,

Lu,

et al. 2024

Advances in Natural Gas: Formation, Processing, and Applications. Volume 6: Natural Gas Transportation and Storage

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Effect of accurate prediction of real-time crack tip position on dynamic crack behaviors in gas pipeline

Cited by 10 publications

References 15 publications

Study on CTOA evolutions during dynamic crack propagation of pipelines

Study on CTOA evolutions during dynamic crack propagation of pipelines

Study on crack tip opening angle evolutions during dynamic crack propagation of pipelines

Prevention of natural gas pipeline cracking

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