Load bearing capacity of API X65 pipe with dent defect under internal pressure and in-plane bending

Baek, Jong-Hyun; Kim, Young-pyo; Kim, Woo‐Sik; Koo, Jachoon; Seok, Chang-Sung

doi:10.1016/j.msea.2012.01.078

Cited by 41 publications

(28 citation statements)

References 7 publications

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“…The dent depth becomes smaller and the curvature around the dent is higher, thus conforming with results from previous studies [30,31,55]. Smaller cross-sectional deformation is beneficial, because when a dent exceeds 5% of the outer diameter the load bearing capacity reduces quickly [56]. The dent profile is, however, constrained to a smaller area as observed in of compression and the state of stress in the dent, which in turn may affect the probability of failure at a later stage [42].…”

supporting

confidence: 89%

Combined three-point bending and axial tension of pressurised and unpressurised X65 offshore steel pipes – Experiments and simulations

Kristoffersen

Langseth

2018

Marine Structures

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Subsea pipelines are occasionally struck and hooked by objects such as anchors or trawl gear. The initial denting, followed by potential hooking and displacement of the pipeline, give rise to a complex load and deformation history. Transverse displacements cause a simultaneous increase in tensile axial forces, further complicating the load sequence. This study examines the effect of applying one of three different axial loads (zero, constant, and linearly increasing) to a pipe while simultaneously deforming it transversely. The three tests were repeated with an internal pressure of 10 MPa (100 bar), and all tests were recreated numerically in finite element simulations using both iterative (implicit) and non-iterative (explicit) approaches. As expected, adding an axial load increased the pipe's resistance to bending in terms of force-displacement, and the same can be said of including internal pressure. However, a more localised dent was observed in the pressurised pipes, which in turn could affect the onset of failure. The experimental results were well captured by the finite element simulations.

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supporting

confidence: 89%

Combined three-point bending and axial tension of pressurised and unpressurised X65 offshore steel pipes – Experiments and simulations

Kristoffersen

Langseth

2018

Marine Structures

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“…In this paper, we use both plasticity and damage effects to estimate load bearing capacity of the Aluminum pipe under indentation. From finite element analyses of the indented pipes reported in previous works (Iflefel et al, 2005, Baek et al, 2012, one can conclude that pipe subjected to higher value of internal pressure have its maximum strain in the indented zone. In this study, the target dent depth as an indication of load bearing capacity for each combination of indenter diameter and internal pressure is obtained when the value of the non dimensional damage parameter becomes equal to unity.…”

Section: Resultsmentioning

confidence: 79%

“…The finite element analysis is carried out according to the basic procedures reported by Iflefel et al (2005) and Baek et al (2012). Baek et al worked on finite element analysis of API X65 steel pipes under indentation without considering the damage effect.…”

Section: Validation Of the Finite Element Analysismentioning

confidence: 99%

“…Maximum dent depth is considered to be 152mm (Baek et al, 2012). The model of the shell comprises of 32582 nodes and 40321 elements.…”

Section: Validation Of the Finite Element Analysismentioning

confidence: 99%

“…It was found that as the pressure increases, the Oyane's criterion reaches to an asymptotic value that is less than the critical value. In the recent work reported by Baek et al (2012), a finite element analysis was carried out on the load bearing capacity of API X65 pipe with dent defect under internal pressure and in-plane bending without considering the damage effect. Allouti et al (2014) worked on A37 steel pipelines containing a gouge and dent defect and investigated the influence of the dent depth on the burst pressure of these pipelines.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Load Bearing Capacity of a Dented Aluminum Pipe Subjected to Internal Pressure Considering the Effect of Ductile Damage

Alashti

Jafari

Hosseinipour

2015

Lat. Am. j. solids struct.

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In this paper, the effect of ductile damage on the behavior of a dented Aluminum pipe subjected to internal pressure is investigated. The plastic behavior of pipes under indentation is studied using continuum damage mechanics theory and the elastic-plastic finite element analysis. Finite element calculations are carried out using the damage plasticity model proposed by Xue and Wierzbicki. The proposed damage plasticity model incorporates effects of both hydrostatic stress and the Lode angle to define the fracture envelope. Numerical calculations for different ranges of internal pressures and indenter diameters with and without damage effect are carried out and results are compared. It is shown that damage has a significant effect on the load bearing capacity of an indented pipe. Results of the present study confirm the credibility of the proposed model in predicting the ductile fracture under multi-axial state of stress loadings.

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Load-Bearing Capacity of X80 Dented Pipelines under Typical Loads

Wang,

Tian,

Yang

2023

J Fail. Anal. and Preven.

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Load bearing capacity of API X65 pipe with dent defect under internal pressure and in-plane bending

Cited by 41 publications

References 7 publications

Combined three-point bending and axial tension of pressurised and unpressurised X65 offshore steel pipes – Experiments and simulations

Combined three-point bending and axial tension of pressurised and unpressurised X65 offshore steel pipes – Experiments and simulations

Load Bearing Capacity of a Dented Aluminum Pipe Subjected to Internal Pressure Considering the Effect of Ductile Damage

Load-Bearing Capacity of X80 Dented Pipelines under Typical Loads

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