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Crack opening displacement in pressurized spheres with surface cracks

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Abstract

The crack opening displacement at the centre of a surface crack in a pressurized sphere has been calculated using a strip yielding model. The shallow shell solution for the stress intensity factor derived by Folias has been extended to derive the COD, and the resulting equations have been solved numerically by a procedure due to Erdogan. The results are of relevance to fracture predictions and gas leakage rate calculations.

Résumé

On a calculé le déplacement d'ouverture au centre d'une fissure de surface dans une sphère soumise à pression interne, en utilisant un modèle de déformation plastique d'une bande.

Pour déterminer le COD, on a procédé à une extension de la solution appliquéc à une coque mince pour obtenir le facteur d'intensité d'entaille selon Folias, et les équations obtenues ont été résolues par voie numérique, en suivant une procédure due à Erdogan.

Les résultats peuvent être utilisés à la prédiction d'une rupture ainsi qu'au calcul de la vitesse de fuite d'un gaz contenu dans un récipient.

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References

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Authors and Affiliations

  1. Central Electricity Generating Board, Berkeley Nuclear Laboratories, Berkeley, Glos., UK

    A. G. Miller

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  1. A. G. Miller
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Miller, A.G. Crack opening displacement in pressurized spheres with surface cracks. Int J Fract 28, 151–160 (1985). https://doi.org/10.1007/BF00018490

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  • DOI: https://doi.org/10.1007/BF00018490

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