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Stress intensity factors for cracks in pressure vessel nozzles

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Abstract

Photoelastic stress analysis has been used to determine stress intensity factors in two types of cracks in the vicinity of radial nozzles in cylindrical pressure vessels. Empirical relationships are presented and validated by tests on 35 models. It is also shown that the values for lateral cracks can be deduced from those predicted for a part-through crack in a plate by applying a curvature correction factor.

Résumé

Une analyse photoélastique de contraintes a été utilisée pour déterminer les facteurs d'intensité de contraintes dans le cas de 2 types de fissures au voisinage d'un piètement radial placé dans un récipient sous pression cylindrique.

Des relations empiriques sont présentées et validées par des essais sur 35 modèles. On montre également que les valeurs relatives à des fissures latérales peuvent être déduites de celles que l'on peut prédire pour une fissure traversante dans une tôle, en appliquant un facteur de correction de courbure.

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Author information

Authors and Affiliations

  1. Department of Engineering Science, Oxford University, Oxford, UK

    G. Pearson & C. Ruiz

Authors
  1. G. Pearson
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  2. C. Ruiz
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Additional information

Marconi-Elliott Avionics Ltd.

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Pearson, G., Ruiz, C. Stress intensity factors for cracks in pressure vessel nozzles. Int J Fract 13, 319–339 (1977). https://doi.org/10.1007/BF00040147

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  • DOI: https://doi.org/10.1007/BF00040147

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