An experimental study on the key fretting variables for flexible marine risers
This paper presents an experimental investigation into the effects of contact conformity, contact pressure and displacement amplitude on the gross-slip fretting behaviour grease-lubricated cylinder-on-flat contacts in the context of flexible marine riser pressure armour wire, and compares behaviour...
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| Format: | Article |
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Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/44554/ |
| _version_ | 1848796943292039168 |
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| author | O’Halloran, S.M. Harte, A.M. Shipway, P.H. Leen, S.B. |
| author_facet | O’Halloran, S.M. Harte, A.M. Shipway, P.H. Leen, S.B. |
| author_sort | O’Halloran, S.M. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper presents an experimental investigation into the effects of contact conformity, contact pressure and displacement amplitude on the gross-slip fretting behaviour grease-lubricated cylinder-on-flat contacts in the context of flexible marine riser pressure armour wire, and compares behaviour with that observed in unlubricated conditions. Characterisation of friction and wear is critical to fretting fatigue life prediction in flexible risers since friction directly controls trailing-edge fretting stresses and hence fatigue crack initiation, on the one hand, and on the other hand, directly affects wear via relative tangential slip (displacement). Wear can have a beneficial or detrimental effect on fatigue crack initiation and propagation, depending on relative slip and slip regime. It is shown that friction and wear are higher for dry conditions than for grease-lubricated conditions. For grease-lubricated conditions, behaviour is determined by whether grease can be retained in the contact (as opposed to being extruded out). Retention (or replenishment) of grease in the contact results in low rates of wear and low coefficients of friction; these conditions are favoured by fretting displacements above a critical value, by low contact conformity, and by low applied loads. |
| first_indexed | 2025-11-14T19:56:01Z |
| format | Article |
| id | nottingham-44554 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:56:01Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-445542020-05-04T19:53:08Z https://eprints.nottingham.ac.uk/44554/ An experimental study on the key fretting variables for flexible marine risers O’Halloran, S.M. Harte, A.M. Shipway, P.H. Leen, S.B. This paper presents an experimental investigation into the effects of contact conformity, contact pressure and displacement amplitude on the gross-slip fretting behaviour grease-lubricated cylinder-on-flat contacts in the context of flexible marine riser pressure armour wire, and compares behaviour with that observed in unlubricated conditions. Characterisation of friction and wear is critical to fretting fatigue life prediction in flexible risers since friction directly controls trailing-edge fretting stresses and hence fatigue crack initiation, on the one hand, and on the other hand, directly affects wear via relative tangential slip (displacement). Wear can have a beneficial or detrimental effect on fatigue crack initiation and propagation, depending on relative slip and slip regime. It is shown that friction and wear are higher for dry conditions than for grease-lubricated conditions. For grease-lubricated conditions, behaviour is determined by whether grease can be retained in the contact (as opposed to being extruded out). Retention (or replenishment) of grease in the contact results in low rates of wear and low coefficients of friction; these conditions are favoured by fretting displacements above a critical value, by low contact conformity, and by low applied loads. Elsevier 2018-01 Article PeerReviewed O’Halloran, S.M., Harte, A.M., Shipway, P.H. and Leen, S.B. (2018) An experimental study on the key fretting variables for flexible marine risers. Tribology International, 117 . pp. 141-151. ISSN 1879-2464 Fretting wear experimental grease-lubrication contact geometry slip amplitude flexible risers pressure armour layer nub-groove http://www.sciencedirect.com/science/article/pii/S0301679X1730378X doi:10.1016/j.triboint.2017.07.032 doi:10.1016/j.triboint.2017.07.032 |
| spellingShingle | Fretting wear experimental grease-lubrication contact geometry slip amplitude flexible risers pressure armour layer nub-groove O’Halloran, S.M. Harte, A.M. Shipway, P.H. Leen, S.B. An experimental study on the key fretting variables for flexible marine risers |
| title | An experimental study on the key fretting variables for flexible marine risers |
| title_full | An experimental study on the key fretting variables for flexible marine risers |
| title_fullStr | An experimental study on the key fretting variables for flexible marine risers |
| title_full_unstemmed | An experimental study on the key fretting variables for flexible marine risers |
| title_short | An experimental study on the key fretting variables for flexible marine risers |
| title_sort | experimental study on the key fretting variables for flexible marine risers |
| topic | Fretting wear experimental grease-lubrication contact geometry slip amplitude flexible risers pressure armour layer nub-groove |
| url | https://eprints.nottingham.ac.uk/44554/ https://eprints.nottingham.ac.uk/44554/ https://eprints.nottingham.ac.uk/44554/ |