Publications

• 2025

  POUZAR, J.; KOŠŤÁL, D.; WESTERBERG, L.; NYBERG, E.; KŘUPKA, I. Labyrinth seal design for space applications. Vacuum, 2025, vol. 232, no. 2, p. 1-10. ISSN: 0042-207X.
  Detail | WWW | Full text in the Digital Library

  OKÁL, M.; KOŠŤÁL, D.; OSARA, J.; LUGT, P.; KŘUPKA, I.; HARTL, M. Experimental Study of the Effect of Thickener on the Film Thickness in the Contacts of a Grease-Lubricated Ball Bearing at Low Speed. TRIBOLOGY TRANSACTIONS, 2025, vol. 68, no. 1, p. 28-38. ISSN: 1040-2004.
  Detail | WWW

• 2024

  OKÁL, M.; KOŠŤÁL, D.; SAKAI, K.; KŘUPKA, I.; HARTL, M. Thickener Behaviour in Rolling Elastohydrodynamic Lubrication Contacts. Tribology Letters, 2024, vol. 72, no. 3, p. 1-16. ISSN: 1573-2711.
  Detail | WWW | Full text in the Digital Library

• 2023

  POUZAR, J.; KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of space lubricant evaporation in a high vacuum environment. Vacuum, 2023, vol. 219, no. A, p. 1-7. ISSN: 0042-207X.
  Detail | WWW

• 2022

  OKÁL, M.; KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effect of Contact Conformity on Grease Lubrication. Lubricants, 2022, vol. 10, no. 11, p. 1-13. ISSN: 2075-4442.
  Detail | WWW | Full text in the Digital Library

  KOŠŤÁL, D.; OKÁL, M.; FRÝZA, J.; KŘUPKA, I.; HARTL, M. Novel In-Situ Observation of the Grease Constituents in Elastohydrodynamic Contacts by Fluorescence Microscopy. Tribology Letters, 2022, vol. 70, no. 126, p. 1-15. ISSN: 1023-8883.
  Detail | WWW

• 2020

  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I. Příspěvek v rámci mezinárodní odborné konference. 2020.
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  KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Use of Pyrene for Quantitative Fluorescence Observation of Li-Grease around EHL Contacts. Tribology Online, 2020, vol. 15, no. 3, p. 117-125. ISSN: 1881-218X.
  Detail | WWW

  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I. Souhrnná zpráva o provedených přípravných pracích včetně definice požadavků pro rotační aktuátor. 2020. p. 1-38.
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  NAVRÁTIL, M.; KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Replenishment Differences in EHL Contact Lubricated by New andIn-bearings-aged Grease. Tribology in Industry, 2020, vol. 42, no. 1, p. 102-114. ISSN: 0354-8996.
  Detail | WWW | Full text in the Digital Library

  KOŠŤÁL, D.; ŠPERKA, P.; CHMELAR, J.; VITEK, P.; POLAK, M.; KŘUPKA, I. Comparison of Grease and Solid Lubrication of Rolling Bearings Under Small-Stroke Reciprocationfor Space Applications. Tribology in Industry, 2020, vol. 42, no. 1, p. 146-158. ISSN: 0354-8996.
  Detail | WWW

• 2018

  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Artificial Surface Roughness Deformation in the Starved EHL Contacts. Tribology Online, 2018, vol. 13, no. 1, p. 1-7. ISSN: 1881-2198.
  Detail | WWW

  KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Replenishment in EHL contact lubricated by greases. ICETAT 2018 Proceeding. 2018. p. 123-123. ISBN: NA.
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  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of the replenishment in EHL contact lubricated by oils and greases. In 73rd Society of Tribologists & Lubrication Engineers Annual Meeting & Exhibition 2018, Proceedings of a meeting held 20-24 May 2018, Minneapolis, Minnesota, USA. 1. 2018. p. 1 (1 s.). ISBN: 9781510867635.
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• 2017

  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental comparison of the behavior between base oil and grease starvation based on inlet film thickness. Tribology in Industry, 2017, vol. 2017, no. 1, p. 110-119. ISSN: 0354-8996.
  Detail | WWW | Full text in the Digital Library

  KOŠŤÁL, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Influence of lubricant inlet film thickness on EHL contact starvation. ASME Transaction, Journal of Tribology, 2017, vol. 139, no. 5, p. 1-10. ISSN: 0742-4787.
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  SAKAI, K.; KOŠŤÁL, D.; SHITARA, Y.; KANETA, M.; KŘUPKA, I.; HARTL, M. Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces. Tribology Online, 2017, vol. 12, no. 5, p. 262-273. ISSN: 1881-2198.
  Detail | WWW

• 2016

  SVOBODA, P.; KOŠŤÁL, D.; GALAS, R.; KŘUPKA, I.; HARTL, M. Tribological behaviour of ultra dispersed diamond-graphite in liquid lubricants. Journal of the Balkan Tribological Association, 2016, vol. 22, no. 4A, p. 4994-5009. ISSN: 1310-4772.
  Detail | WWW

  KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Including the method of lubricant film thickness measurement with the use of the monochromatic interferometry to the education of tribology. In 55th International conference of Machine design Departments. 2016. p. 141-146. ISBN: 978-80-01-05542-7.
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  DONG, J.; SVOBODA, P.; VRBKA, M.; KOŠŤÁL, D.; URBAN, F.; ČÍŽEK, J.; ROUPCOVÁ, P.; DONG, H.; KŘUPKA, I.; HARTL, M. Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising. Journal of the mechanical behavior of biomedical materials, 2016, vol. 55, no. 1, p. 215-227. ISSN: 1751-6161.
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  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Relationship between Thickness of Entering Layer and Level of EHL Contact Starvation. In Tribology - Industrial and Automotive Lubrication. Esslingen (Germany): Techniosche Akademie Esslingen e.V., 2016. p. 120-120. ISBN: 978-3-943563-23- 8.
  Detail | WWW

  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Study of Scale Effect in a Starved Elastohydrodynamically Lubricated Contact. Applied Mechanics and Materials, 2016, vol. 821, no. 1, p. 138-143. ISSN: 1662- 7482.
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• 2015

  KOŠŤÁL, D.; NEČAS, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Lubricant Rupture Ratio at Elastohydrodynamically Lubricated Contact Outlet. Tribology Letters, 2015, vol. 59, no. 3, p. 1 (jasne p.)ISSN: 1023-8883.
  Detail | WWW

  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I. Study of Scale Effect in a Starved Elastohydrodynamically Lubricated Contact. In ENGINEERING MECHANICS 2015, 21st International Conference Engineering Mechanics 2015. Engineering mechanics 2014. 1. Svratka: Institute of Theoretical and Applied Mechanics, 2015. p. 314-315. ISBN: 978-80-86246-42- 0. ISSN: 1805- 8248.
  Detail | WWW

  KOŠŤÁL, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Experimental observation of elastohydrodynamically lubricated contacts replenishment. MM Science Journal, 2015, no. 2015/3, p. 640-644. ISSN: 1805-0476.
  Detail | WWW

  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I. Experimental Investigation of Lubrication Film Formation at Start-up of Smooth Surfaces. In Book of Proceedings of 56th International Conference of Machine Design Departments. 1. Nitra: Slovak University of Agriculture in Nitra, 2015. p. 375-380. ISBN: 978-80-552-1377-4.
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  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Experimental Investigation of Lubrication Film Formation at Start-up of Smooth Surfaces. MM Science Journal, 2015, vol. 2015, no. December, p. 825-828. ISSN: 1805-0476.
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• 2014

  SVOBODA, P.; KOŠŤÁL, D.; KUŇÁK, J.; KŘUPKA, I. Study of grease behaviour in a starved Elastohydrodynamically lubricated contact. MM Science Journal, 2014, vol. 2014, no. June, p. 464-469. ISSN: 1805- 0476.
  Detail | WWW

  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Mechanismy mazání valivých ložisek. In 2014. p. 30-32.
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  KOŠŤÁL, D.; ŠPERKA, P.; HARTL, M. Controlling and Measuring Starvation Severity in EHL Contacts. Engineering Mechanics, 2014, vol. 21, no. 5, p. 321-328. ISSN: 1802- 1484.
  Detail

• 2013

  SVOBODA, P.; KOŠŤÁL, D.; POPELKA, M.; KŘUPKA, I. The experimental study of transition between fully flooded and starved regime in EHL contact. Engineering Mechanics, 2013, vol. 20, no. 1, p. 13-25. ISSN: 1802- 1484.
  Detail | WWW

  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. Experimental study of starved EHL contacts based on thickness of oil layer in the contact inlet. Tribology International, 2013, vol. 67, no. 1, p. 140-145. ISSN: 0301- 679X.
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  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Surface Roughness Effects in Starved EHL Contacts. In Proceedings of World Tribology Congres 2013. 1. Turín: Italian Tribology Association, 2013. p. 951-954. ISBN: 9781634393522.
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  KOŠŤÁL, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Influence of rolling elements distance on starvation. In Society of Tribologists & Lubrication Engineers Annual Meeting & Exhibition 2013 / Proceedings of a meeting held 5-9 May 2013, Detroit, Michigan, USA. Detroit: Curran Associates, Inc. ( Dec 2013 ), 2013. p. 296-298. ISBN: 978-1-62993-289- 7.
  Detail | WWW

• 2012

  KOŠŤÁL, D.; SVOBODA, P.; KŘUPKA, I. Lubrication film starvation on two element device. In 53rd International Conference of Machine Design Departments. Brno: Brno University of Technology, 2012. p. 137-140. ISBN: 978-80-214-4533- 8.
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  SVOBODA, P.; KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M. EXPERIMENTAL STUDY OF LUBRICATION FILM FORMATION IN MULTIPLE CONTACTS DEVICE UNDER STARVED CONDITIONS. In Proceedings of the ASME/ STLE 2012 International Joint Tribology Conference. Denver, CO; United States: American Society of Mechanical Engineers, Tribology Division, TRIB, 2012. p. 233-235. ISBN: 978-0-7918-4508- 0.
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