Fracture behavior of carbon steel pipe with local wall thinning subjected to bending load

Miyazaki, Katsumasa; Kanno, Satoshi; Ishiwata, M.; Hasegawa, Kunio; Ahn, Soek Hwan; Ando, Kotoji

doi:10.1016/s0029-5493(99)00141-7

Cited by 89 publications

(31 citation statements)

References 1 publication

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“…Since the chemical process ofcorrosion caused a huge reduction of the stiffness and t with wall thinning on the outside of the pipes are almost identical to those of pipes with wall thinning on the insidesurface [4], thus; corrosion effect is expressed by local wall thinning roundly.…”

Section: Geometric Propertiesmentioning

confidence: 99%

Effect of Ground Motions on Nonlinear Seismic Behavior of Corroded Buried Gas Pipeline

Kolbadi¹,

Hassani²,

Kolbadi

et al. 2015

AJCE

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Recent earthquakes have damaged many lifeline structures. Buried gas pipelines are also no exceptions.Sometimes, theses pipes are subjected to a thinning of the wall thickness due to corrosion. Therefore, it is important to evaluate the strength of the pipes undergoing local wall thinning to maintain the integrity of the piping systems. The main purpose of this study is to understand failure aspects of buried pipeline caused by earthquake and degradation of metal due to corrosion through FEM. In dynamic analysis, corroded pipeline approaches to critical criteria (reaching the yield stress) in much less time. In this case, if the corroded pipe thickness be half, the yielding angle is reduced to a quarter.

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Section: Geometric Propertiesmentioning

confidence: 99%

Effect of Ground Motions on Nonlinear Seismic Behavior of Corroded Buried Gas Pipeline

Kolbadi¹,

Hassani²,

Kolbadi

et al. 2015

AJCE

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“…At room temperature the researches on pipe with LWT focused on the stress analysis [3][4][5][6][7], limit load [8][9][10][11][12][13][14], fracture behavior [15][16][17][18][19][20], safety assessment [21] and fatigue behavior [22,23]. Different pipe types (straight pipe [9,10], elbow pipe [8,11,12] and tee pipe [20]), different load types (internal pressure [4,8], bending load [10,17] and combined loads [7,13,14]) and different defect numbers (single LWT [3][4][5]9,10] and multiple LWTs [21]) were considered by different research methods (finite element method [3,7,12] and experimental method [8,9,17]). Many meaningful results have been obtained.…”

Section: Introductionmentioning

confidence: 99%

Ultimate creep load and safety assessment of P91 steel pipe with local wall thinning at high temperature

Xue

Zhou

Peng

2015

International Journal of Mechanical Sciences

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“…As local wall thinning is characterized by a notch-type defect, rather than a cracklike defect, application of the net-section limit load approach seems plausible. Accordingly, experimental and analytical works have been performed to propose assessment equations for wall thinning in straight pipes based on the net-section limit load approach (Stephen and Lei 2000;Miyazaki et al 1999Miyazaki et al , 2002Hasegawa et al 2002, Shim et al 2004ASME 2003). It should be noted that most of works up to present were concerned with assessing wall thinning in straight pipes.…”

Section: Introductionmentioning

confidence: 99%

Plastic loads of elbows with local wall thinning under in-plane bending

Oh¹,

Kim²,

Park

2007

Int J Fract

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Based on systematic three-dimensional (3-D), large strain FE limit analyses using elasticperfectly plastic materials, this paper quantifies the effect of local wall thinning on plastic behavior and TES (twice-elastic-slope) plastic loads for 90 • elbows under in-plane bending. The thinning geometry is assumed to be rectangular rather than circular, but the nonlinear geometry effect is fully considered. Results from systematic analyses lead to simple approximations for TES plastic loads, covering a wide range of elbow and thinning geometries. Although the proposed approximations are developed for the case when wall thinning locates in the center of the elbow, it is also shown that they can be equally applied to the case when thinning exists anywhere within the elbow. Brief discussion is made on application of the proposed approximations to estimate maximum load-carrying capacities of elbows with local wall thinning. Abbreviations TES Twice-elastic-slopeNomenclature E Young's modulus d (Maximum) Depth of local wall thinning f o Normalized limit moment for circumferential part-through surface crack f ∞ Normalized limit moment for sufficiently long thinning M In-plane moment M L Limit in-plane moment of a defective elbow M o Limit in-plane moment of a smooth elbow (without any defect) M s o Limit moment of a smooth straight pipe = 4σ o r 2 t R Bend radius r Mean pipe radius t Thickness of a pipe λ Bend characteristic = Rt/r 2 σ o

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Fracture behavior of carbon steel pipe with local wall thinning subjected to bending load

Cited by 89 publications

References 1 publication

Effect of Ground Motions on Nonlinear Seismic Behavior of Corroded Buried Gas Pipeline

Effect of Ground Motions on Nonlinear Seismic Behavior of Corroded Buried Gas Pipeline

Ultimate creep load and safety assessment of P91 steel pipe with local wall thinning at high temperature

Plastic loads of elbows with local wall thinning under in-plane bending

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