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 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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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ISSN: | 0094-9930 1528-8978 |
DOI: | 10.1115/1.3122769 |