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.
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Fracture Mechanics Analysis of Fatigue Crack Repaired Joints
J. Efraín Rodríguez-Sánchez,
e-mail: ersanche@imp.mx
J. Efraín Rodríguez-Sánchez
Instituto Mexicano del Petróleo
, Eje Central Lázaro Cárdenas 152, Edificio 19, Piso 1, Cubiculo 105A, 07730 México D.F.
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Feargal P. Brennan,
e-mail: F.Brennan@btopenworld.com
Feargal P. Brennan
University College London
, Department of Mechanical Engineering, Torrington Place, London WC1E, 7JE England
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Alejandro Rodríguez Castellanos
e-mail: arcastel@imp.mx
Alejandro Rodríguez Castellanos
Instituto Mexicano del Petróleo
, Eje Central Lázaro Cárdenas 152, Edificio 28, Piso 1, 07730 México D.F.
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J. Efraín Rodríguez-Sánchez
Instituto Mexicano del Petróleo
, Eje Central Lázaro Cárdenas 152, Edificio 19, Piso 1, Cubiculo 105A, 07730 México D.F.e-mail: ersanche@imp.mx
Feargal P. Brennan
University College London
, Department of Mechanical Engineering, Torrington Place, London WC1E, 7JE Englande-mail: F.Brennan@btopenworld.com
Alejandro Rodríguez Castellanos
Instituto Mexicano del Petróleo
, Eje Central Lázaro Cárdenas 152, Edificio 28, Piso 1, 07730 México D.F.e-mail: arcastel@imp.mx
J. Offshore Mech. Arct. Eng. May 2005, 127(2): 182-189 (8 pages)
Published Online: December 15, 2004
Article history
Received:
April 14, 2004
Revised:
December 15, 2004
Citation
Rodríguez-Sánchez, J. E., Dover, W. D., Brennan, F. P., and Castellanos, A. R. (December 15, 2004). "Fracture Mechanics Analysis of Fatigue Crack Repaired Joints." ASME. J. Offshore Mech. Arct. Eng. May 2005; 127(2): 182–189. https://doi.org/10.1115/1.1894408
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