Pipeline Stress Analysis Through Stress Function Fittings

Cavaco, Marco Antonio Martins; Viotti, Matı́as R.; Albertazzi, G Armando

doi:10.1590/1679-78254812

Cited by 2 publications

(2 citation statements)

References 9 publications

(13 reference statements)

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“…Numerical analysis of threaded connections can be made using 3D or axisymmetric models. 3D models representing the helix geometry are very accurate for simulating effects of make-up torque [1,36]. However, 3D models are also computationally expensive.…”

Section: Review Of Fe Modelling Of Leakage In Casing Connectionsmentioning

confidence: 99%

Leakage Resistance Envelopes of API 8 Round Casing Connections using FE Analysis

Uribe

Carrazedo

Beck

2019

Lat. Am. j. solids struct.

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Leakage resistance of casing connections can be evaluated by extremely expensive testing procedures. Although testing is required for connection validation, significant amount of resources can be saved by complementing testing with Finite Element (FE) analysis. In this regard, a broadly accepted criterion to characterize leaks in FE simulation is still required. This paper proposes an objective and accurate criterion to characterize leakage resistance of casing connections in axisymmetric FE simulation. The criterion is based on stab flank contact pressures and stab flank engaged length parameters. The criterion is tested in application to API 8 Round LTC connections (5 ½ J55 14lb/ft), and confronted with test results. Leakage envelopes are obtained considering make-up torque and tensile axial loads. The influence of taper on connection sealability is also investigated. The long term goal of the investigation is to derive probabilistic leakage envelopes of casing connections considering manufacturing tolerances, effect of thermal cycles, and seal ovalization due to bending during assembly.

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Section: Review Of Fe Modelling Of Leakage In Casing Connectionsmentioning

confidence: 99%

Leakage Resistance Envelopes of API 8 Round Casing Connections using FE Analysis

Uribe

Carrazedo

Beck

2019

Lat. Am. j. solids struct.

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“…Due to higher soil rigidity on the buried pipe in all three dimensions, larger displacements would have a stronger effect on pipe response. Cavaco et al (2018) performed stress analysis in pipes due to soil-pipe interaction through a hybrid experimental technique. They presented coefficients for stress functions using data fitting.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical modeling of horizontally-bent buried pipelines crossing fault slip

Fard

Nekooei

Oskouei

et al. 2019

Lat. Am. j. solids struct.

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The behavior and response of pipelines subjected to slip fault movement is studied by numerical simulations as well as experimental setup. A finite element modeling is also developed via ABAQUS software. In this study, an artificial accelerogram is applied to the system and matched against the response spectrum according to the standard No. 2800 (Iranian code of practice for seismic resistant design of buildings, 2014). Three different pipe nominal sizes and thicknesses (1 ½ " , 2 " and 4 ") are considered in the experiments on the shaking table. According to the results, plastic hinge as well as the extremum stress and strain is formed in the fixed soil wedge and at locations close to the fault line. Further, as the pipe D/t ratio increases, the plastic hinge forms further away from the fault line. According to the results, the pipe-soil strain ratio (εp/s) has lower values at larger pipe diameters. Also, the axial strains would be greater for the systems with higher (εp/s) ratios.

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Pipeline Stress Analysis Through Stress Function Fittings

Cited by 2 publications

References 9 publications

Leakage Resistance Envelopes of API 8 Round Casing Connections using FE Analysis

Leakage Resistance Envelopes of API 8 Round Casing Connections using FE Analysis

Experimental and numerical modeling of horizontally-bent buried pipelines crossing fault slip

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