Localised upheaval buckling of buried subsea pipelines

Wang, Zhenkui; Heijden, G. H. M. van der; Tang, Yougang

doi:10.1016/j.marstruc.2018.03.010

Cited by 33 publications

(12 citation statements)

References 49 publications

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“…The infinitely long assumption is reasonable in cases when the length dimension is considerably greater than the radius. This assumption has also been made in previous works [19,[36][37][38], where the DNA molecules, bacterial flagellar filaments, micro-tubules, and seabed pipelines are all considered long rods. The analysis is based on a perturbation scheme of Kirchhoff's rod theory.…”

Section: Without Medium (Current Work)mentioning

confidence: 85%

Elastic buckling analysis of an embedded infinitely long rod under combined axial and torsional loads

Wei

2019

Mathematics and Mechanics of Solids

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In this paper, expressions for the critical axial–torsional loads are derived for the buckling of an elastic rod embedded in an elastic medium. The derivation is based on the assumption that the deforming rod encounters a response force from the surrounding medium, and a first-order perturbation analysis of the governing equilibrium equations. It is shown that a dimensionless universal buckling relationship, independent of material and geometry, exists between the critical axial load, both in compression and tension, and the critical torsional load. A reducing axial compression, or an increasing axial tension, enhances the critical torsional load. In addition, two different mode shapes are predicted for the same critical combined loads, and the buckled shapes are generally three-dimensional.

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Section: Without Medium (Current Work)mentioning

confidence: 85%

Elastic buckling analysis of an embedded infinitely long rod under combined axial and torsional loads

Wei

2019

Mathematics and Mechanics of Solids

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“…Brink, Lee, et al ( 2019) provide further useful guidance to researchers in this regard. 1,2,3,4,5,6,7,9,11,12,13,14,15,16,17,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,38,42,43,44,45,47,48,49,50,51,53,54,55. 1,3,4,5,8,10,11,15,16,17,21,22,…”

Section: Overview Of Mturkmentioning

confidence: 99%

Amazon’s MTurk: A Currently Underutilised Resource for Survey Researchers?

Farrell

Sweeney

2021

Accounting, Finance &Amp; Governance Review

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A recent innovation in empirical academic research is the use of online labour markets as a source of data. One such market, Amazon's Mechanical Turk ("MTurk") has been used by studies published in high-quality accounting journals to source participants. Given the traction of this data source in high-calibre publications, it is timely to assess its current impact and future potential for accounting research. This paper examines the extent of adoption of MTurk as a data collection tool in leading accounting journals and specifically considers its adoption and suitability for survey research. Findings reveal that the use of MTurk in high-quality accounting publications is gathering momentum, with approximately the same number of articles published/accepted in 2019 as the total number of articles published in the preceding seven years. However, it is also found that nearly all the journal articles reviewed adopted MTurk for experimental research with only a limited presence in survey research. The study contributes to the literature by providing a comprehensive review of the adoption of MTurk in high-quality accounting journals by frequency, research method, and research participant type. Further, it analyses the unique methodological concerns that MTurk poses for survey-based accounting research, thereby providing researchers with guidance on its potential future usefulness and pitfalls to avoid. The paper concludes that difficulties in the availability of, and screening for, specific groups of participants may limit its potential for survey research until online labour market platforms are developed further.http://bit.ly/mturk1519, accessed in June 2020.

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“…This first simple model highlights thus the essential role of torsion in the lateral buckling phenomenon, at least under particular boundary conditions. In practice, a more realistic analysis of the lateral buckling of submarine pipelines requires the use of a more comprehensive model, involving new features such as (axial) friction effects [42], material and geometric non-linearities, among other things, but there is no doubt that torsion will also influence the global/localized buckling response of such practical pipelines. Further analyses are currently performed in that direction so as to get closer to real conditions, in terms of constitutive laws, geometric imperfections, boundary conditions and initial conditions (such as residual stresses), still considering the crucial influence of torsional effects, which should result in a new paper.…”

Section: Conclusion 330mentioning

confidence: 99%

Investigation of the Torsional Effects on the Lateral Buckling of a Pipe-Like Beam Resting on the Ground under Axial Compression

Grognec

Nême

Cai

2020

Int. J. Str. Stab. Dyn.

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This paper deals with the lateral buckling behavior of an axially compressed beam interacting with the ground on which it is resting. Such a simple model is supposed to reproduce the same trends as observed during the lateral buckling of offshore pipelines on the seabed. In such practical analyses, the pipe-soil interaction relates the ground to the neutral axis of the pipeline. It is shown that, although such a constraint significantly affects the buckling behavior of the pipeline, it cannot reflect the torsional component of the buckling modes. However, this component is encountered in practice and may further modify the critical loads. Therefore, in this present preliminary study, the interaction between the beam in hand and the surrounding ground is modeled by a connection (a continuous distribution of lateral springs) related to the bottom line of the beam. In this way, the real contact between the soil and the bottom line of a pipe is mimicked, allowing for both flexural and torsional deformations in the buckling response. The problem is investigated analytically using an Euler–Bernoulli beam model with an isotropic linear elastic constitutive law and also an elastic interaction law. Original analytical solutions are derived and compared to numerical results obtained through finite element computations. In comparison with classical solutions (with the connection related to the neutral axis), new types of buckling modes may appear when considering torsional effects, depending on the boundary conditions, with generally much lower critical loads. These first results are certainly representative of some features of the global/localized lateral buckling of offshore pipelines, indicating that torsional effects should also be taken into account in such more comprehensive analyses.

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Localised upheaval buckling of buried subsea pipelines

Cited by 33 publications

References 49 publications

Elastic buckling analysis of an embedded infinitely long rod under combined axial and torsional loads

Elastic buckling analysis of an embedded infinitely long rod under combined axial and torsional loads

Amazon’s MTurk: A Currently Underutilised Resource for Survey Researchers?

Investigation of the Torsional Effects on the Lateral Buckling of a Pipe-Like Beam Resting on the Ground under Axial Compression

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