Abstract
In the current study, it is studied a problem of the simulations of stress state in the damaged section of the pipeline segment at its repair by introducing a composite band. The simulation was performed in ANSYS finite element software. Damage is modeled as single defect having a rectangular shape. The edges of the defect are rounded to the correct configuration with a specific radius R. Pipe model is loaded by internal pressure . It is taken into account X52 grade steel. The stress state of the pipe is studied for its two variants: (i) the model without defect and composite shell, (ii) the model of the defect with the filler and the composite shell (bandage ). We studied the inhomogeneous stress field in the elastic deformation region. Stresses were calculated along two axes passing through the center of defect (the defect located on the main axis directed along the tube axis and in the radial direction). Modeling of stress state was performed for a defect imitating corrosive delamination of the layers. The delamination of corrosion in the defect area was modelled as a cavity of small volume. Corrosion is simulated as a detachment between the defect metal and composite filler.
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Acknowledgements
The authors gratefully acknowledge the support of European Commission, Marie Curie Program, contract No. PIRSES-GA-2012-318874, Project “Innovative Non-Destructive Testing and Advanced Composite Repair of Pipelines with Volumetric Surface Defects (INNOPIPES)” and the Southern Federal University (Proposal No. 213.01-2014/03VG).
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Cherpakov, A.V., Chebakov, M.I., Zecheru, G., Dumitrescu, A. (2017). Modeling of Corrosion in Filler Defect in the Repair of Pipes Overlay Composite Bandage. In: Parinov, I., Chang, SH., Jani, M. (eds) Advanced Materials. Springer Proceedings in Physics, vol 193. Springer, Cham. https://doi.org/10.1007/978-3-319-56062-5_31
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DOI: https://doi.org/10.1007/978-3-319-56062-5_31
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