Local Buckling Behavior of 48″, X80 High-Strain Line Pipes

Suzuki, Noriyuki; Tajika, Hisakazu; Igi, Satoshi; Okatsu, Mitsuhiro; Kondo, Joe; Arakawa, Takekazu

doi:10.1115/ipc2010-31637

Cited by 7 publications

(3 citation statements)

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“…21 and Fig. 22 respectively are characterized by pipe wall bulging at the buckled area, a typical pattern for internally pressurized pipes subjected to bending [21], [22]. The results indicate a very good agreement of the buckled configurations obtained numerically with the shape of the buckled specimens.…”

Section: Simulation Of External Pressure (Collapse) Testmentioning

confidence: 55%

The effect of spiral cold-bending manufacturing process on pipeline mechanical behavior

Chatzopoulou

Sarvanis

Karamanos

et al. 2019

International Journal of Solids and Structures

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Large-diameter steel pipes, fabricated through the spiral-welding manufacturing process, are extensively used in onshore pipelines for the transmission of energy (hydrocarbon) and water resources. However, their use in demanding applications, such as geohazard areas or in offshore applications has been very limited. Safeguarding the structural integrity in such areas of those pipes requires an efficient strain-based design framework. Bending deformation capacity in the presence of internal pressure is the major loading case under geohazard actions, whereas external pressure capacity governs the mechanical design in moderate-deep offshore applications. To predict accurately the structural performance of spiral-welded pipes, the coldbending manufacturing process should be taken into account. In the present paper, numerical models are developed simulating both the cold-bending process (decoiling and spiral bending) and the structural response of the pipe subjected to the loading conditions under consideration.The numerical modes have been verified against experimental results of spiral pipes conducted in the framework of a European research project. A parametric analysis is also conducted to examine the effect of spiral cold forming process on the structural behavior of spiral welded pipes. The results from the present study indicate that spiral-welded pipes can sustain significant amount of bending deformation and external pressure, in favor of their use in demanding onshore and moderately deep offshore pipeline applications.

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Section: Simulation Of External Pressure (Collapse) Testmentioning

confidence: 55%

The effect of spiral cold-bending manufacturing process on pipeline mechanical behavior

Chatzopoulou

Sarvanis

Karamanos

et al. 2019

International Journal of Solids and Structures

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“…While these works share commonly similar viewpoints of ductile failure behavior as characterized by a local criterion incorporating void growth, more systematic studies of ductile failure criteria derived from tensile tests of small scale specimens to predict ductile cracking initiation in larger structural components and, specifically, full scale testing of dented pipe specimens subjected to large scale straining remain scarce. These studies include the works of Sadasue and Igi, 21 Oh et al, 22,23 Ishikawa et al, 24 Suzuki et al, 25 and Igi et al 26…”

Section: Introductionmentioning

confidence: 99%

A strain based criterion to assess ductile failure initiation in dented pipelines under tensile loading

Uribe

Ruggieri

Ohata

2020

The Journal of Strain Analysis for Engineering Design

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This work addresses the problem of describing ductile fracture behavior and predicting ductile failure initiation in dented pipelines under tensile loading based upon a 3-D computational cell approach coupled with a stress-modified, critical strain (SMCS) criterion for void coalescence. A series of tension tests conducted on notched tensile specimens with different notch radius for a carbon steel pipe provides the stress–strain response of the tested structural steel from which the SMCS criterion is calibrated. Full scale cyclic bend tests also performed on a 165 mm O.D tubular specimen with 11 mm wall thickness enable verification of the proposed approach in assessing ductile cracking behavior in damaged pipelines. These exploratory analyses predict the tensile failure load for the pipe specimen associated with ductile crack initiation in the highly damaged area inside the denting and buckling zone which are in good agreement with experimental measurements.

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“…No entanto, há um número limitado de investigações que abordam a aplicabilidade e efetividade do critério de fratura dúctil derivado de pequenos corpos de prova para predizer o comportamento da falha dúctil de amostras em escala real de tubos e componentes estruturais maiores. Dentre esses trabalhos, podem ser citados os desenvolvidos por Sadasue et al [42], Igi et al [43], Oh et al [44,45], Ishikawa et al [46] e Suzuki et al [47].…”

Section: Integridade Estrutural De Materiais Dúcteisunclassified

Avaliação de integridade estrutural em dutos e tubulações de alta pressão utilizando metodologias baseadas em deformação plástica.

Uribe¹,

Andres²

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Oil and gas pipelines traverse distances of the order of hundreds and even thousands of kilometers. Along those distances the pipelines may be subject to several accidental loads such as large-scale soil movement, slope slides and seabed movements. The plastic strain resulting from these events can seriously affect the structural integrity of pipelines, compromising its mechanical integrity and fluid containment in an eventual pipeline failure. For this reason, it is important to guarantee the structural integrity of those components in order to avoid their plastic instability or ductile fracture. This work explores the capability of computational cell methodology coupled with the Stress Modified Critical Strain (SMCS) damage criterion to simulate the behavior of ductile fracture in tensile specimens subjected to tension load and pipe specimens subjected to large longitudinal strains. Thus, this work focuses on the development of an engineering procedure to assess the structural integrity of pipelines, in order to predict the critical load (tensile failure load) at onset of ductile fracture in pipelines used to transport oil and gas subjected to large plastic strains. A series of tensile test conducted by Toyoda et al. [1] on tensile specimens with different notch radius, for a structural steel, provides the stress-strain response used to calibrate the SMCS damage criterion. Full scale cyclic bend test also performed by Toyoda et al. [1] on a pipe specimen with 165 mm outer diameter and 11 mm wall thickness evaluates the proposed procedure for predicting ductile fracture behavior in damaged pipelines. This exploratory study predicts the tensile failure load associated with the onset of ductile fracture in the highly damaged area by plastic strains inside buckling zone in good agreement with the experimental measurements.

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Local Buckling Behavior of 48″, X80 High-Strain Line Pipes

Cited by 7 publications

References 0 publications

The effect of spiral cold-bending manufacturing process on pipeline mechanical behavior

The effect of spiral cold-bending manufacturing process on pipeline mechanical behavior

A strain based criterion to assess ductile failure initiation in dented pipelines under tensile loading

Avaliação de integridade estrutural em dutos e tubulações de alta pressão utilizando metodologias baseadas em deformação plástica.

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