Fracture mechanics analysis of fatigue crack repaired joints

J. Efraín Rodríguez-Sánchez, William D. Dover, Feargal P. Brennan, Alejandro Rodríguez Castellanos

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Fatigue life predictions based on fracture mechanics calculations are required to satisfy an increasing level of safety demanded by industry. These predictions are mainly used to schedule NDT inspections and with inspection data make structural integrity assessments. The periodic inspection-assessment process can lead to the implementation of a fatigue crack repair by crack removal. Fracture mechanics analysis is used again to determine whether or not a repair will be effective. For the case of tubular joints, in offshore structures, once repairs have been shown to be ineffective it is usually required to install a clamp to maintain the continuity of joint members if the structure is still required for production. In this paper a fracture mechanics analysis of crack repaired joints based on Y factors is presented. The analysis is used to predict fatigue life after crack removal and is validated against T-butts experimental data. The analysis is also extrapolated for the prediction of fatigue life of crack repaired tubular joints.

Original languageEnglish
Pages (from-to)182-189
Number of pages8
JournalJournal of Offshore Mechanics and Arctic Engineering
Volume127
Issue number2
DOIs
Publication statusPublished - 1 May 2005

Keywords

  • maintenance
  • fracture mechanics
  • fatigue life
  • stress
  • fracture (materials)
  • inspection-assessment

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