Predicting Crack Arrest in Pipelines – Proposal for a Novel Analytical Approach

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Artikelnummer
01252_2014_SP2_03
A novel analytical approach for determination of a required minimum toughness level for prevention of long-running ductile fracture is proposed. Material resistance to crack propagation is quantified via the elastic-plastic toughness parameter J integral. The leading part of crack driving force is considered to be represented by elastic distortion energy accumulated in the pipe-wall due to component stressing by internal pressure. Combining material resistance and component stressing enables to perform a limit state design for prediction of an arrest pressure. Finally, an alternative equation for calculation of a pressure dependent crack velocity is presented.
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Titel Predicting Crack Arrest in Pipelines – Proposal for a Novel Analytical Approach
Autoren Alexander Völling / Marion Erdelen-Peppler / Christoph Kalwa / Holger Brauer / Brahim Ouaissa / Heike Meuser
Erscheinungsdatum 29.08.2014
Seitenzahl 5
Format PDF
Sprache English
Beschreibung A novel analytical approach for determination of a required minimum toughness level for prevention of long-running ductile fracture is proposed. Material resistance to crack propagation is quantified via the elastic-plastic toughness parameter J integral. The leading part of crack driving force is considered to be represented by elastic distortion energy accumulated in the pipe-wall due to component stressing by internal pressure. Combining material resistance and component stressing enables to perform a limit state design for prediction of an arrest pressure. Finally, an alternative equation for calculation of a pressure dependent crack velocity is presented.
Zeitschrift 3R - Special 2 2014
Verlag Vulkan-Verlag GmbH
© 2017 Vulkan-Verlag GmbH