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- W2512077140 abstract "The paper describes an investigation into the cause of the cracking discovered in anode support brackets in an offshore structure, and to determine which brackets required repair or future inspection. Metallurgical examination of a damaged bracket to investigate the nature of the failure, and finite element fracture mechanics analysis was used to simulate the causes of the damage and to predict the remaining life under normal structural loading. Investigation of the most heavily cracked bracket removed from the structure showed that the initial welding was sound and that the cracking was due to fatigue. Analysis of fatigue cracking measured in the brackets has shown that the environmental loads on the anodes are too small to have produced the observed damage. It was therefore concluded that the damage was produced by piling loads during installation. Simulation of the observed crack growth using finite element fracture mechanics modelling of a typical joint showed the observed pattern of cracking to be consistent with large out of plane bending loads on the anode brackets. Remaining lives of the joints, predicted using finite element fracture mechanics modelling, were very long due to the damage being oriented parallel to the primary stresses in the member. Repairmore » was not carried out, but selected joints will be included in future routine inspections. Simultaneously, design details for future structures have been changed to minimize the risk of recurrence.« less" @default.
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- W2512077140 date "1996-12-01" @default.
- W2512077140 modified "2023-09-23" @default.
- W2512077140 title "Fatigue cracking at anode support brackets in an offshore jacket structure" @default.
- W2512077140 hasPublicationYear "1996" @default.
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