Buckling failure analysis for buried subsea pipeline under reverse fault displacement

Yu, Yang; Li, Zhenmian; Yu, Jianxing; Cheng, Siyuan; Wu, Jingyi; Wang, Huakun; Xu, Weipeng

doi:10.1016/j.tws.2021.108350

Cited by 18 publications

(3 citation statements)

References 28 publications

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“…[ 51 ] Furthermore, all four independent peaks fitted on the Fe 2p spectrum were assigned to Fe─O bonds, indicating the formation of frictional chemical products such as Fe 2 O 3 or Fe 3 O 4 at the sliding interface during friction (Figure 3l). [ 52,53 ] In summary, HRTEM images and XPS spectroscopy demonstrate that the introduction of CQDs facilitates the formation of tribofilm containing CQDs and iron oxides, which favors the ultrafast superlubricity of PEG─CA/CQDs on the steel/steel contact.…”

Section: Resultsmentioning

confidence: 97%

Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

Du,

Yang,

et al. 2023

Adv Funct Materials

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Macroscale superlubricity on engineering steel surfaces offers a promising solution for minimizing friction and wear in engineering applications. However, achieving superlubricity typically requires a long running‐in period, which may result in significant wear for the friction pair. Herein, a new lubricant with superlubricating properties is rationally designed by using polyethylene glycol (PEG) and critic acid (CA) under complexing effect with a running‐in period of about 800 s. Importantly, the introduction of carbon quantum dots (CQDs) obtained from the pyrolysis of CA into PEG aqueous solution shortens the running‐in period for achieving macroscale superlubricity (µ ≈ 0.005) between steel/steel contact to 44 s. The corresponding wear rate (1.15 × 10−7 mm3 N−1 m−1) on the steel disk is reduced by 77% due to the shorter running‐in time. Furthermore, the surface analysis combined with the molecular dynamics simulations demonstrates that CQDs easily adsorb on the surface of the friction pair, forming a carbon film that reduces interaction energy between the lubricant molecules and the substrate. This work provides new insights into the lubrication mechanism of CQDs and contributes to the design of liquid superlubricants with short running‐in periods and low wear rates on engineering steel surfaces.

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Section: Resultsmentioning

confidence: 97%

Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

Du,

Yang,

et al. 2023

Adv Funct Materials

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“…Xu et al introduced the von Mises yield criterion to correctly predict the local buckling of buried pipelines subjected to reverse fault motion [41]. Yu et al [42] discussed the buckling of subsea pipelines with integral buckle arrestors and then introduced soil springs to study the buckling failure of buried subsea pipelines under reverse fault displacement [43]. The above research enriches the content of VFIFE and demonstrates its advantages.…”

Section: Introductionmentioning

confidence: 97%

Buckling Analysis of Thin-Walled Circular Shells under Local Axial Compression using Vector Form Intrinsic Finite Element Method

Sun

et al. 2023

Metals

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The buckling failure of thin-walled circular shells under local axial compression is common in engineering. This study uses the vector form intrinsic finite element (VFIFE) method to investigate the buckling behavior of thin-walled circular shells under local axial compression by introducing a multilinear hardening model, taking into account geometric and material nonlinearity. A buckling analysis program based on the VFIFE method was developed and verified by comparison with experimental results. The buckling mode and postbuckling behavior of thin-walled circular shells were studied by using the verified program. The results show that the VFIFE method with a multilinear hardening model can accurately calculate the buckling load of local axially compressed thin-walled circular shells, and effectively simulate the buckling development process, which offers great advantages in predicting the postbuckling of structures.

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“…Rofooei et al [16] made a detailed parameter analysis of the local buckling behavior under the reverse fault through test and numerical simulation, including pipeline material, diameter thickness ratio, burial depth, and diameter ratio. Yu et al [17] investigated the buckling failure of buried subsea pipeline under reverse fault displacement.…”

Section: Introductionmentioning

confidence: 99%

Local buckling behavior of buried pipeline under seismic oblique-reverse fault displacement

Huang²,

Chen

et al. 2022

Preprint

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Seismic fault displacement is the main factor leading to the local buckling failure of the buried pipeline, especially crossing the oblique-reverse fault. The 3-D displacement of the oblique-reverse fault makes the local buckling behavior of the buried pipeline more complex. It may be inaccurate to evaluate the local buckling location and degree using the pipe local buckling results under the single fault displacement, affecting the monitoring and safety assessment of the pipeline. In this paper, to determine the pipe local buckling behavior (potential local buckling locations, developing process) under the oblique-reverse fault displacement, a shell and solid element nonlinear contact coupling model of the pipeline crossing oblique-reverse fault is established using ABAQUS. The results reveal two potential local buckling areas and three stages of the local buckling developing process under the oblique-reverse fault displacement. Subsequently, the potential local buckling locations and three stages in the local buckling under different operating conditions is obtained. It proves that using the results of pipe local buckling under single fault to evaluate the pipeline local buckling under composed fault is not safe enough. Consequently, local buckling behavior of the pipeline crossing oblique-reverse fault provides a reference for the preliminary pipe design, detection, and evaluation.

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Buckling failure analysis for buried subsea pipeline under reverse fault displacement

Cited by 18 publications

References 28 publications

Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

Buckling Analysis of Thin-Walled Circular Shells under Local Axial Compression using Vector Form Intrinsic Finite Element Method

Local buckling behavior of buried pipeline under seismic oblique-reverse fault displacement

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