The Effect Of Axial Tension On Moment Carrying Capacity Of Line Pipe Stressed Beyond The Elastic Limit

Wilhoit, James C.; Merwin, J. E.

doi:10.4043/1355-ms

Cited by 2 publications

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“…The installation and immersion phases of the pipes can be carried out by the J-shaped installation method. 25 This method has the advantage of reducing the effects of certain installation constraints. 3,22,24,25 During the installation process, axial tension loads can occur in the thicknesses of the different materials constituting these structures.…”

Section: Resultsmentioning

confidence: 99%

“…25 This method has the advantage of reducing the effects of certain installation constraints. 3,22,24,25 During the installation process, axial tension loads can occur in the thicknesses of the different materials constituting these structures. 4,25 We consider a five-layer system of Glass Syntactic Polypropylene (see Figure 1) 2,3,12 and a three layers system of polypropylene (see Figure 1) 26,27 under the effects of loadings in axial tensile load.…”

Section: Resultsmentioning

confidence: 99%

“…3,22,24,25 During the installation process, axial tension loads can occur in the thicknesses of the different materials constituting these structures. 4,25 We consider a five-layer system of Glass Syntactic Polypropylene (see Figure 1) 2,3,12 and a three layers system of polypropylene (see Figure 1) 26,27 under the effects of loadings in axial tensile load. The experiments details of quasi-static tensile tests are presented by Vestrum et al 13,14 The response of the pipeline samples was obtained using a deformation hydraulic piston.…”

Section: Resultsmentioning

confidence: 99%

“…The displacement levels obtained show that the two materials contribute to the overall resistance of the pipe during the application of the axial tension loading. 25 This observation makes it possible to identify the response of the thermal insulation system during the quasi-static tests carried out under axial tension by Vestrum et al 13,14 The mechanical resistance of the pipe structure under the axial tensile load is no longer limited only to that of the metal steel tube but also includes the resistance of the different layers of the coating system. 4,22 The deformation process of these coating materials can be changed due to their nonlinear character.…”

Section: Resultsmentioning

confidence: 99%

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Time-dependent response of thermoplastic matrix composite material under the cyclic loadings

Pagore

Kol

Betchewe

2021

Journal of Thermoplastic Composite Materials

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Under the service conditions, steel pipelines coated with the thermal protection system are subjected to cyclic loadings of axial tension and hydrostatic pressure. The finite element method generally used to simulate the behavior of composite structures under these loadings allows us to estimate the stresses generated in the system and to conclude on several origins of damage. However, for the framework of displacement or deformation analyses in such multilayer systems, these calculations do not allow a better prediction of their behavior. The methods used do not take sufficiently into account the characteristics of the different coating materials to predict their response in service conditions under cyclic loading. In this paper, we consider the viscosity of the thermoplastic materials used for the five layers coating system. Finite element calculations allow us to observe the areas of highest stress concentration at the interface with the steel pipe. Simulations allowed us to observe that the applied loads lead to increases in residual deformation in the thermoplastic matrix composite material. Cyclic tensile loading causes cracks in the matrix of the syntactic foam material. The study carried out here makes it possible to justify the origin of the failure mechanism in the composite material at the time of the installation of the pipelines which could limit the duration of their use in an offshore environment. The tensile failure of the syntactic foam considered as the polypropylene matrix composite material on which cyclic loads have been applied, is due to the stress level at a given temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Time-dependent response of thermoplastic matrix composite material under the cyclic loadings

Pagore

Kol

Betchewe

2021

Journal of Thermoplastic Composite Materials

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“…Substantial attention has been paid to studying the responses of offshore pipes under combined bending and tension. Wilhoit and Merwin 120 presented theoretical solutions to identify the effect of axial tension on the moment-carrying capacity of a pipe. They found that axial tension reduces the pipe’s moment-carrying capability but also decreases the moment acting on the pipe.…”

Section: Analysis Of Offshore Pipes Under Different Loadsmentioning

confidence: 99%

A review of the design and analysis of reinforced thermoplastic pipes for offshore applications

Морозов

Ashraf

et al. 2017

Journal of Reinforced Plastics and Composites

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The development and recent applications of reinforced thermoplastic pipes for offshore oil and gas applications are reviewed. The design and materials of reinforced thermoplastic pipes are presented. Reinforced thermoplastic pipes have been increasingly accepted as an important alternative to traditional metallic offshore pipes due to their distinct advantages such as a higher stiffness to weight ratio, improved fatigue resistance and better corrosion resistance. Their potential applications can be extended to deep-water risers. Loading conditions which could be experienced by them for offshore applications are described. Existent studies and analyses of offshore pipes under these loading conditions are discussed. Based on this discussion, this article outlines the limitations of the current studies of reinforced thermoplastic pipes and future work to improve the analysis and design of reinforced thermoplastic pipes is recommended.

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The Effect Of Axial Tension On Moment Carrying Capacity Of Line Pipe Stressed Beyond The Elastic Limit

Cited by 2 publications

References 0 publications

Time-dependent response of thermoplastic matrix composite material under the cyclic loadings

Time-dependent response of thermoplastic matrix composite material under the cyclic loadings

A review of the design and analysis of reinforced thermoplastic pipes for offshore applications

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