New strategy for testing new high nitrogen bearing steel for offshore wind turbines

Nicola Pio Belfiore, Francesca Arcobello Varlese, Fabio Battistella, Toni Blass, Ana Maria Cabral, Volkher Diehl, José Ramón Gonzalez Garcia, Paula F. Gorjão, Walter Holweger, Matt Kohlhepp, Thomas Lundin Christiansen, Roman Ritzenhoff, Domenico Stocchi, Werner Trojahn, Kristian Vinter Dahl

Research output: Contribution to journalJournal articleResearchpeer-review


This article presents some results obtained during the first stage of the European Union project titled “STEELWIND,” a part of which has been dedicated to roller–race contact dynamics. Contact has been modeled qualitatively using viscous-elastic friction, in the sliding regions, and hysteresis-modified Hertzian pressure in the whole contact zone. Slip and stick areas are detected within the contact area where the sliding velocity may have both opposite directions parallel to the entraining velocity. Considering the complexity of the hybrid rolling–sliding–sticking conditions, the developed model, although simplified, can be helpful to develop a sliding–rolling test by means of a standard reciprocator stand, where nonsymmetrical and mobile configurations of the testing race samples are introduced.
Original languageEnglish
JournalWind Engineering
Issue number5
Pages (from-to)426-430
Number of pages5
Publication statusPublished - 2016


  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Bearings
  • High nitrogen steel
  • Offshore wind turbines
  • Rolling contacts
  • Bearings (structural)
  • Friction
  • Nitrogen
  • Steel testing
  • Wind turbines
  • Contact dynamics
  • Developed model
  • Hertzian pressure
  • High nitrogen steels
  • Mobile configuration
  • Sliding regions
  • Sliding velocities
  • complexity
  • friction
  • hysteresis
  • steel
  • wind turbine
  • Power and plant engineering (mechanical engineering)
  • Mechanical components
  • Tribology (mechanical engineering)
  • rolling bearings
  • sliding friction
  • wind turbines
  • European Union project
  • roller-race contact dynamics
  • viscous-elastic friction
  • sliding regions
  • hysteresis-modified Hertzian pressure
  • slip areas
  • stick areas
  • sliding velocity
  • entraining velocity
  • hybrid rolling-sliding-sticking conditions
  • sliding-rolling test
  • standard reciprocator stand
  • high nitrogen bearing steel

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