A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers
O'Halloran, Sinéad M.
Shipway, Philip H.
Connaire, Adrian D.
Leen, Sean B.
Harte, Annette M.
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O’Halloran, S. M., Shipway, P. H., Connaire, A. D., Leen, S. B., & Harte, A. M. (2017). A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers. Tribology International, 108, 7-15. doi: https://doi.org/10.1016/j.triboint.2016.10.020
This paper presents a combined experimental and computational methodology for fretting wear-fatigue prediction of pressure armour wire in flexible marine risers. Fretting wear, friction and fatigue parameters of pressure armour material have been characterised experimentally. A combined fretting wear-fatigue finite element model has been developed using an adaptive meshing technique and the effect of bending-induced tangential slip has been characterised. It has been shown that a surface damage parameter combined with a multiaxial fatigue parameter can accurately predict the beneficial effect of fretting wear on fatigue predictions. This provides a computationally efficient design tool for fretting in the pressure armour layer of flexible marine risers.