Limit analysis of flaws in pressurized pipes and cylindrical vessels. Part I: Axial defects

Staat, Manfred; Vu, Duc Khôi

doi:10.1016/j.engfracmech.2006.04.031

Cited by 32 publications

(45 citation statements)

References 9 publications

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“…(16) with Eq. (11) suggests that one of the formulae in Table 1 could be used to define f. According to Fig. 5(b) the simple formula no.…”

Section: Collapse Pressure Of Pipes With Part-circumferential Surfacementioning

confidence: 98%

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Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure

Staat

2006

International Journal of Pressure Vessels and Piping

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“…(16) with Eq. (11) suggests that one of the formulae in Table 1 could be used to define f. According to Fig. 5(b) the simple formula no.…”

Section: Collapse Pressure Of Pipes With Part-circumferential Surfacementioning

confidence: 98%

“…A new Folias factor for axial cracks M 2 FL Z 1C 1:25c 2 =ðr 2 tÞ and other modifications are proposed in [11]. closed end pipe if D is chosen according to Eq.…”

Section: Fðsþmentioning

confidence: 99%

Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure

Staat

2006

International Journal of Pressure Vessels and Piping

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“…Previous work [2][3][4][5][6][7][8][9][10][11][12] has evaluated the plastic collapse load for pipes but these solutions have not considered the influence of residual stress, particularly long-range residual stress. Miller [2] defined the global collapse pressure as the load resulting in unbounded plastic strain in the structure and local collapse as the load leading to yielding of the local ligament or local net section.…”

Section: Introductionmentioning

confidence: 99%

“…Kim and Shim et al [3][4][5] improved the accuracy of the existing analytical solutions of global collapse loads of pipes containing defects under single and combined loadings. Staat et al [7][8] used finite element methods to give solutions for local and global collapse loads of closed-end pipes with flaws. They also treated local net section yielding as local collapse, although Shen and Tyson [11] realised that the term local collapse is a misnomer since the yielded region is constrained and therefore the component can sustain further increases in pressure.…”

Section: Introductionmentioning

confidence: 99%

Use of Elastic Follow-Up to Study the Effect of Displacement Controlled Loading on Plastic Collapse Pressures for Circumferentially Cracked Pipes

Smith

Pavier

2015

Volume 6B: Materials and Fabrication

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. ABSTRACTStructural integrity assessments of pressurised pipes consider plastic collapse as a potential failure mode. This paper uses finite element analysis to explore the effect of the pipe end boundary conditions on the collapse pressure. Two end conditions are considered: a fixed axial load and a fixed axial displacement. The fixed axial displacement condition represents a long-range axial residual stress. In the R6 structural integrity assessment procedure long-range residual stress is associated with elastic follow-up. However, no guidance is given on whether the level of elastic follow-up is sufficient to justify treating long-range residual stress as a primary stress.In this paper, a method is proposed to estimate elastic follow-up of an internally pressurised pipe containing a fully circumferential crack. It is found that the elastic follow-up is related to the length of the pipe. A short pipe that contains a fully circumferential crack, subjected to a displacement induced axial stress, has a global collapse that is not modified by the fixed displacement condition. The short pipe corresponds to a small elastic follow-up factor, Z. However, as the elastic follow-up factor increases, the presence of long-range residual stress starts to make a contribution to global collapse. When elastic follow-up is significant, a long-range residual stress has the same effect on global collapse as does a mechanical stress.

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“…The sizes of defects deal with the magnitude of industrial accidents in such cylinders (Staat and Duc, 2007). In technological product innovation, the fracture properties of steel cylinders with defects are very important for their engineering design and application.…”

Section: Introductionmentioning

confidence: 99%

The influence of variations of geometrical parameters on the notching stress intensity factors of cylindrical shells

Moustabchir

Alaoui

Babaoui

et al. 2017

jtam

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The modern approach of Virtual Engineering allows one to detect with some accuracy the residual life of components especially free of cracks. The life estimation becomes cumbersome when the components contain a crack. A straightforward formulation requires a parameter that considers geometrical constraints and materials properties. The magnitude of the stress singularity developed by the tip of a crack, needs to be expressed by the Stress Intensity Factors (SIF). In order to prove the validity of the results, calibration by experimental and/or analytical technique is required. To have a better understanding of this parameter, in the first part of this paper an analytical model to compute the SIF connected to crack propagation into Mode I has been implemented. The case study displays a pipeline component with a crack defect submitted to internal pressure. Therefore, an appropriate correlation between the analytical approach and numerical simulation has been established embedded.

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Limit analysis of flaws in pressurized pipes and cylindrical vessels. Part I: Axial defects

Cited by 32 publications

References 9 publications

Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure

Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure

Use of Elastic Follow-Up to Study the Effect of Displacement Controlled Loading on Plastic Collapse Pressures for Circumferentially Cracked Pipes

The influence of variations of geometrical parameters on the notching stress intensity factors of cylindrical shells

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