Fracture Assessment Procedures for Steel Pipelines Using a Modified Reference Stress Solution

An accurate defect assessment procedure is needed to ensure integrity of girth welded steel pipelines while avoiding unnecessary repairs. An integral part of such a procedure is an estimation scheme for the crack driving force. In this work, a modified reference stress solution was developed for the...

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Veröffentlicht in:Journal of pressure vessel technology 2009-06, Vol.131 (3), p.11-11
Hauptverfasser: Tkaczyk, Tomasz, O’Dowd, Noel P, Nikbin, Kamran
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container_title Journal of pressure vessel technology
container_volume 131
creator Tkaczyk, Tomasz
O’Dowd, Noel P
Nikbin, Kamran
description An accurate defect assessment procedure is needed to ensure integrity of girth welded steel pipelines while avoiding unnecessary repairs. An integral part of such a procedure is an estimation scheme for the crack driving force. In this work, a modified reference stress solution was developed for the assessment of elastic-plastic pipes with surface breaking defects. For the particular case of interest (reeled offshore pipelines), the loading is phrased in terms of applied strain. The stress-based approach has therefore been extended to the case of strain/displacement control. The results obtained using the modified reference stress solution have been compared with a three-dimensional finite-element analysis. Very good agreement has been obtained. The predictions are also significantly better than those obtained from existing approaches. A comparison between the proposed method and full scale testing will be presented in a separate paper.
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source ASME Transactions Journals (Current)
subjects Applied sciences
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Inelasticity (thermoplasticity, viscoplasticity...)
Materials and Fabrication
Mechanical engineering. Machine design
Physics
Solid mechanics
Steel design
Steel tanks and pressure vessels
boiler manufacturing
Structural and continuum mechanics
title Fracture Assessment Procedures for Steel Pipelines Using a Modified Reference Stress Solution
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