Buckling Resistance of Large Diameter Spiral Welded Linepipe

Zimmerman, Tom; Timms, Chris; Xie, Jueren; Asante, James

doi:10.1115/ipc2004-0364

Cited by 17 publications

(17 citation statements)

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“…[2][3][4]. Studies have shown that, in comparison to UOE pipes, spiral pipes can have equivalent or better properties regarding to bending [5], plastic collapse [6], bursting [7], ductile tearing [8] or buckling resistance [4,9]. Also, it has been shown that the fatigue resistance and fracture arrest properties are at least equivalent to those of UOE pipes [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Influence of notch orientation on ductile tearing in SENT specimens

Turtelboom

Vandenbroucke

Minnebruggen

et al. 2014

SCAD

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There is a growing interest for the use of spiral welded pipes in strain based design related applications. Since the influence of the spiral weld on the plastic behaviour of the pipe is not yet fully understood, further research on this topic is required. An important aspect of this plastic behaviour is the effect of mixed mode loading on weld defects located in the helical weld. This paper elaborates on the first experimental trials to evaluate ductile tearing by means of single edge notched tensile specimen (SENT) testing with slanted notches. Tests were performed on two SENT specimens, one with a slanted notch and another with a straight notch in order to investigate the influence of mixed mode loading. The crack mouth opening displacement and crack extension were determined experimentally by means of digital image correlation and potential drop measurements respectively. The crack extension and the potential drop measurements were related by means of finite element simulations.Keywords: Spiral Linepipe; Strain Based Design; SENT specimen; Finite Element Analysis INTRODUCTIONDue to the ever increasing demand for energy, more and more oil and gas pipelines are being installed to extract fossil fuels from harsh natural environments. These pipelines might have to withstand large plastic deformation as a result of for example discontinuous permafrost or seismic activity [1]. Consequently, the pipe axial straining capacity becomes equally important as the pipe hoop strength necessary for pressure containment. To take this into account, a strain based design approach should be applied. Such a design limits the allowable imposed axial strain to a fraction of the strain capacity. At the moment, strain based design for spiral welded pipes is not as well documented as is the case for UOE pipes. Due to the spiral weld and different anisotropic material response, the behaviour of spiral welded pipes will differ from that of UOE pipes. The use of spiral welded pipes could potentially lead to a project cost reduction of 5-15% compared to UOE pipes, which makes them attractive for industrial use. [4,9]. Also, it has been shown that the fatigue resistance and fracture arrest properties are at least equivalent to those of UOE pipes [10,11].This work is situated within the framework of a research project focusing on the tensile strain capacity of spirally welded pipes with seam weld defects. The aim of this work is to develop a combined numericalexperimental methodology to evaluate the tearing resistance of notches having a slanted orientation with respect to the loading direction. This leads to mixed mode loading condition as discussed in section 2. Because it is known that the constraint of Single Edge Notch Tension (SENT) specimens resembles this of full pipes [12,13], this geometry has been selected as key element of the methodology. Specimen dimensions, notch orientation and advanced instrumentation are discussed in section 3. Finite element analyses discussed in section 4 are used to relate potential drop mea...

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Section: Introductionmentioning

confidence: 99%

“…The use of spiral welded pipes could potentially lead to a project cost reduction of 5-15% compared to UOE pipes, which makes them attractive for industrial use. [4,9]. Also, it has been shown that the fatigue resistance and fracture arrest properties are at least equivalent to those of UOE pipes [10,11].…”

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confidence: 99%

Influence of notch orientation on ductile tearing in SENT specimens

Turtelboom

Vandenbroucke

Minnebruggen

et al. 2014

SCAD

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“…The study concludes that the spiral weld seam may not be detrimental to tube performance and that spiral-welded line pipe performs as good as longitudinal welded linepipe in terms of local buckling behavior. Further experimental testing on spiral-welded tubes was performed by Salzgitter Mannesmann, reported by Zimmermann et al [27]. In that research, four-point bending tests were performed on four spiral-welded tubes.…”

Section: Figurementioning

confidence: 99%

Ultimate bending capacity of spiral-welded steel tubes – Part I: Experiments

Gresnigt

Vasilikis

et al. 2016

Thin-Walled Structures

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The present investigation refers to the bending capacity of spiral-welded steel tubes. The first part of this investigation presents the results of a full-scale experimental program, aiming to investigate the structural behavior of large-diameter spiral-welded steel tubes under bending. A companion paper (Part II) is also published which further studies the behavior of these elements numerically, using finite element simulations.The testing program presented in Part I consists of thirteen 42-inch-diameter spiral-welded steel tubes with D/t ranging between 65 and 120. Some of the tubular specimens contain girth welds and coil connection welds, which are shown to penalize the ultimate bending capacity of the tubes. Extensive measurements of initial imperfections and material properties are performed for each tubular specimen. The material properties of the specimens are investigated through both uniaxial tensile and compression coupon tests. A series of large-scale four-point bending tests is performed to determine the structural behavior of the tubes, resulting in local buckling failure of the tubes under consideration.The bending behavior of the thirteen specimens is documented extensively. The study offers information with regard to the ultimate bending resistance of the specimens. In addition, the full moment-curvature equilibrium path is presented, supplemented by measurements on the development of cross sectional ovalisation and tube wall wrinkling during the bending tests.

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“…In order to evaluate the validity of the numerical simulation, the results were calibrated with previous experimental results (Zimmerman et al 2004). Four specimens were used to study the local buckling behavior in experiments, including two material grades X70 and X80.…”

Section: Model Calibrationmentioning

confidence: 99%

“…In this paper, a practical three-dimensional model was established using the nonlinear finite element method (FEM) and calibrated with previous experimental results (Zimmerman et al 2004). After that, deformation behavior and different failure modes of unpressurized and pressurized pipes were studied under bending conditions.…”

Section: Introductionmentioning

confidence: 99%

Local buckling failure analysis of high-strength pipelines

Shuai

Jin

et al. 2017

Pet. Sci.

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Pipelines in geological disaster regions typically suffer the risk of local buckling failure because of slender structure and complex load. This paper is meant to reveal the local buckling behavior of buried pipelines with a large diameter and high strength, which are under different conditions, including pure bending and bending combined with internal pressure. Finite element analysis was built according to previous data to study local buckling behavior of pressurized and unpressurized pipes under bending conditions and their differences in local buckling failure modes. In parametric analysis, a series of parameters, including pipe geometrical dimension, pipe material properties and internal pressure, were selected to study their influences on the critical bending moment, critical compressive stress and critical compressive strain of pipes. Especially the hardening exponent of pipe material was introduced to the parameter analysis by using the Ramberg-Osgood constitutive model. Results showed that geometrical dimensions, material and internal pressure can exert similar effects on the critical bending moment and critical compressive stress, which have different, even reverse effects on the critical compressive strain. Based on these analyses, more accurate design models of critical bending moment and critical compressive stress have been proposed for high-strength pipelines under bending conditions, which provide theoretical methods for highstrength pipeline engineering.

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Buckling Resistance of Large Diameter Spiral Welded Linepipe

Cited by 17 publications

References 0 publications

Influence of notch orientation on ductile tearing in SENT specimens

Influence of notch orientation on ductile tearing in SENT specimens

Ultimate bending capacity of spiral-welded steel tubes – Part I: Experiments

Local buckling failure analysis of high-strength pipelines

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