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Assessment of Pipe Defects Using a Constraint-Modified Failure Assessment Diagram

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Abstract

In this study, the failure assessment diagram (FAD) is constraint modified using the assumption that the constraint T stress is proportional to the non-dimensional loading. The constraint-modified FAD has been used to compute safety factors associated with spherical and elliptic defects and a long notch. The results were compared to the classical approach, indicating the possibility of a reduction of conservatism. In addition, the use of domain constraint-modified FAD indicates that in some cases, increases in fracture toughness due to the loss of constraint lead to the use of limit analysis rather than an elasto-plastic fracture mechanics approach.

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Authors and Affiliations

  1. LPTPM, Hassiba BenBouali University of Chlef, 02000, Chlef, Algeria

    O. Bouledroua & M. Hadj Meliani

  2. LaBPS-ENIMI, Paul Verlaine University of Metz, Ile de Saulcy, 57045, Metz, France

    M. Hadj Meliani & G. Pluvinage

Authors
  1. O. Bouledroua
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  2. M. Hadj Meliani
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  3. G. Pluvinage
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Correspondence to G. Pluvinage.

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Bouledroua, O., Hadj Meliani, M. & Pluvinage, G. Assessment of Pipe Defects Using a Constraint-Modified Failure Assessment Diagram. J Fail. Anal. and Preven. 17, 144–153 (2017). https://doi.org/10.1007/s11668-016-0221-z

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  • DOI: https://doi.org/10.1007/s11668-016-0221-z

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