Effects of the Initial Geometric Imperfections on the Buckling Behavior of High-Strength UOE Manufactured Steel Pipes

Kainat, Muntaseer; Lin, Meng; Cheng, J. J. Roger; Martens, M.; Adeeb, Samer

doi:10.1115/1.4032990

Cited by 12 publications

(6 citation statements)

References 7 publications

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“…Figure 1. Dependency of fracture toughness with geometry/constraint [5] FEM is an efficient tool to simulate the full-scale and small-scale tests for pipeline materials to characterize their failure [6][7][8][9][10]. However, traditional FEM for simulating crack propagation is marred by mesh, element size, and element distribution dependency [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Unified Fracture Model for X65 Pipeline Material Under Various Constraints Using the Extended Finite Element Method (XFEM)

Shahzamanian

2024

Journal of Pressure Vessel Technology

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It is generally accepted that the fracture strain is dependent on geometry/constraints in metals. However, the current available implementation of XFEM assumes a fixed fracture strain criterion independent of the constraints. The objective of this paper is to develop and implement a variable fracture strain criterion in XFEM that is capable of predicting a wide range of fracture conditions in X65 pipeline steels with various crack tip constraints. Various small-scale tests with different out of plane constraints obtained from the literature were simulated using the XFEM in ABAQUS software. For each test, the value of the maximum principal strain (Maxpe) as a fracture initiation criterion in the cohesive zone model (CZM) in XFEM framework was varied while keeping the fracture energy constant until the model was able to accurately replicate the reported experimental results. For each test, the crack tip constraints were characterized and the stress triaxialities and Lode angle parameters at the onset of fracture initiation were calculated from the models. The results allowed expressing the fracture strain as an explicit function of stress triaxiality which was then implemented in ABAQUS XFEM using UDMGINI subroutine. For the sake of comparison, the tests were simulated in finite element method (FEM) using a similar damage initiation model namely, the Johnson-Cook (J-C) model. A single model in XFEM was able to accurately replicate the experimental observations for all specimens and compared well to experiments in the way simulated by FEM damage model.

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Section: Introductionmentioning

confidence: 99%

A Unified Fracture Model for X65 Pipeline Material Under Various Constraints Using the Extended Finite Element Method (XFEM)

Shahzamanian

2024

Journal of Pressure Vessel Technology

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“…[16,17] Pipeline degradation caused by corrosion varies with time. [18] The current evaluation method commonly used in the pipeline industry is based on the analysis of historical in-line inspection (ILI) data to quantitatively predict the growth of corrosion defects. But the reliability of this method heavily depends on the availability and quality of ILI data.…”

Section: Introductionmentioning

confidence: 99%

Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction

Zhang

Ding

2022

Can J Chem Eng

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The corrosion mechanism of X80 steel in simulated solutions of acid red soil and product oil sediment under mechano‐electrochemical interaction (MEI) was researched to build a new finite element model through multi‐physical field coupling simulation technology. Based on the new model, the effect of external wall defect growth on the internal wall corrosion of oil pipelines was analyzed in detail. The results showed that the distributions of stress and corrosion of the internal wall were extremely affected by the external wall defect depth, and the corrosion rate of the internal wall was enlarged remarkably by the external wall defect growth. Moreover, attributing to the local galvanic cell effect under MEI, the growth rates of corrosion defects in the depth and length directions of the external defect were accelerated because these directions were associated with larger stress and equivalent to the anode, but the corrosion rate in the width direction of the external defect was inhibited because this direction was associated with smaller stress and equivalent to the cathode.

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“…The wrinkling responses of the pipeline in the accident were successfully simulated through their numerical models. Kainat et al [14] first investigated the local wrinkling behavior of buckling pipeline under compressive stress induced by environmental loads, considering the geometric imperfection of pipeline induced by pipe manufacturing process. Jalali et al [15,16] studied the mechanical responses of pipes made of different material under fault displacement type go-hazard load.…”

Section: Introductionmentioning

confidence: 99%

Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones

Xia

Zhang

2018

Energies

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Buried pipelines are the main means of long distance transportation of natural gas. These pipelines are in high risk crossing liquefaction areas due to large deformations and stresses that may exist in pipe induced by the buoyancy load. In this study, a systematic analytical and numerical analysis were performed to investigate the mechanical behavior of a buried gas pipeline subjected to buoyancy in liquefaction areas. Soil constraints on pipe were considered accurately in the proposed models through soil spring assumptions. Effects of axial forces on pipe’s bending deformation were also considered via the governing equations for beam under bending and tension. Deformation compatibility condition was utilized to derive the axial forces in pipe. The accuracy of the proposed analytical model was validated by comparing its results with those derived by an established rigorous finite element model. In addition, parametric analysis was finally performed using the analytical model to study the influences of pipe diameter, pipe wall thickness, soil spring stiffness and width of liquefaction zone on pipe’s mechanical responses. This study can be referenced in the strength analysis and performance based safety evaluation of buried gas pipelines crossing liquefaction areas.

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Effects of the Initial Geometric Imperfections on the Buckling Behavior of High-Strength UOE Manufactured Steel Pipes

Cited by 12 publications

References 7 publications

A Unified Fracture Model for X65 Pipeline Material Under Various Constraints Using the Extended Finite Element Method (XFEM)

A Unified Fracture Model for X65 Pipeline Material Under Various Constraints Using the Extended Finite Element Method (XFEM)

Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction

Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones

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