Abstract
The use of composite systems as a repair methodology in the pipeline industry has grown in recent years. However, there are still no widely accepted standards governing the design and installation of such systems but the potential cost savings can be significant. Whilst composite repairs are gaining acceptance and approvals they do not as yet have full regulatory approval and this should be considered during the repair assessment process. In this study, the analysis of the behaviour of circumferential through cracks in repaired pipe with bonded composite patch subjected to internal pressure is performed using three dimensional finite element methods. The stress intensity factor is used as a fracture criteria which describes the elastic behavior of the structure. The obtained results show that the presence of the bonded composite patch reduces significantly the stress intensity factor, what can improve the lifespan of the pipe.
Published Version
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