Interaction Relationship for High Aspect Ratio Semi-Elliptical Internal Surface Cracks in CO2 Pipelines

Qiao Jin

doi:10.4028/www.scientific.net/AMR.774-776.581

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 774-776Interaction Relationship for High Aspect Ratio...

Interaction Relationship for High Aspect Ratio Semi-Elliptical Internal Surface Cracks in CO₂ Pipelines

Abstract:

Surface cracks with aspect ratio can occur in pipelines subjected to corrosion attacks. There are few studies on interaction relationship for double semi-elliptical surface cracks with such high aspect ratio. This paper attempts to develop a finite element method to determine on interaction of two semi-elliptical internal surface cracks with high aspect ratio by analyzing two key fracture mechanics parameters, i.e., the stress intensity factor and the-stress. The numerical results prove that the existing flaw-interaction criteria are too general to lose the worthy of application especially in pipeline engineering.

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Periodical:

Advanced Materials Research (Volumes 774-776)

Pages:

581-584

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.774-776.581

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Online since:

September 2013

Authors:

Qiao Jin

Keywords:

Aspect Ratio, CO₂ Pipelines, Interaction of Circumferential Cracks, Stress Intensity Factor (SIF), T-Stress

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