Publications

• 2023

  BOBZIN, K.; KALSCHEUER, C.; THIEX, M.; ŠPERKA, P.; HARTL, M.; REITSCHUSTER, S.; MAIER, E.; LOHNER, T.; STAHL, K. DLC-Coated Thermoplastics: Tribological Analyses Under Dry and Lubricated Sliding Conditions. Tribology Letters, 2023, vol. 71, no. 1, ISSN: 1023-8883.
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  HABCHI, W.; ŠPERKA, P.; BAIR, S. The role of the glass transition for EHL minimum film thickness. Tribology International, 2023, vol. 190, no. 12, ISSN: 0301-679X.
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  HAN, Y.; ŠPERKA, P.; WANG, J.; KŘUPKA, I.; HARTL, M.; LI, W.; WANG, X.; WEI-MIN, L. Influence of Free Water Droplets on Film Formation Under Point Contact Grease Lubrication. ASME Transaction, Journal of Tribology, 2023, vol. 145, no. 7, p. 074101-1 (074101-17 p.)ISSN: 0742-4787.
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  SMOLÍK, L.; RENDL, J.; OMASTA, M.; BYRTUS, M.; ŠPERKA, P.; POLACH, P.; HARTL, M.; HAJŽMAN, M. Comprehensive analysis of fluid-film instability in journal bearings with mechanically indented textures. JOURNAL OF SOUND AND VIBRATION, 2023, vol. 546, no. 03, ISSN: 0022-460X.
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  HABCHI, W.; ŠPERKA, P.; BAIR, S. Is Elastohydrodynamic Minimum Film Thickness Truly Governed by Inlet Rheology?. Tribology Letters, 2023, vol. 71, no. 3, ISSN: 1023-8883.
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  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.
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  POLÁČEK, T.; ŠPERKA, P.; KŘUPKA, I. Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions. Friction, 2023, vol. 12, no. 1, p. 164-173. ISSN: 2223-7704.
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• 2022

  REITSCHUSTER, S.; MAIER, E.; LOHNER, T.; STAHL, K.; BOBZIN, K.; KALSCHEUER, C.; THIEX, M.; ŠPERKA, P.; HARTL, M. DLC-Coated Thermoplastics: Tribological Analyses under Lubricated Rolling-Sliding Conditions. Tribology Letters, 2022, vol. 70, no. 4, p. 1-16. ISSN: 1023-8883.
  Detail | WWW | Full text in the Digital Library

  QUINN, C.; NEČAS, D.; ŠPERKA, P.; MARIAN, M.; VRBKA, M.; KŘUPKA, I.; HARTL, M. Experimental investigation of friction in compliant contact: The effect of configuration, viscoelasticity and operating conditions. Tribology International, 2022, vol. 165, no. 1, p. 107340-107340. ISSN: 0301-679X.
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  DWIVEDI, V.; PROCHAZKA, D.; JANIČKOVIČ, D.; ŠPERKA, P.; ŠVEC, P.; KAISER, J.; VEIS, P.; POŘÍZKA, P. LIBS Protocol for the Assessment of Depth Profile, Homogeneity, and Quantification of Fe/Co - based Bilayer Ribbon. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2022, vol. 196, no. 1, p. 106509 ( p.)ISSN: 1873-3565.
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  PROCHÁZKA, J.; VILIŠ, J.; DOBROCKÝ, D.; ŠPERKA, P. Modification of Diffusion Layers by Laser Shock Peening. Manufacturing TECHNOLOGY, 2022, vol. 22, no. 6, p. 724-732. ISSN: 1213-2489.
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  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.
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  MICHALEC, M.; POLNICKÝ, V.; FOLTÝN, J.; SVOBODA, P.; ŠPERKA, P.; HURNÍK, J. The prediction of large-scale hydrostatic bearing pad misalignment error and its compensation using compliant support. PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 2022, vol. 75, no. May 2022, p. 67-79. ISSN: 0141-6359.
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  WOLF, M.;ŠPERKA, P.; FRÝZA, J.;FATEMI, A. Film Thickness in Elastohydrodynamically Lubricated Slender Elliptic Contacts: Part II - Experimental Validation and Minimum Film Thickness. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2022, vol. 236, no. 12, p. 2477-2490. ISSN: 1350-6501.
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• 2021

  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Film thickness interrelationship of base oil and grease lubricated compliant and hard non-conformal contacts. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2021, vol. 235, no. 12, p. 2616-2625. ISSN: 1350-6501.
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  SALAJKOVÁ, Z.; HOLÁ, M.; PROCHAZKA, D.; ONDRAČEK, J.; PAVLIŇÁK, D.; ČELKO, L.; GREGAR, F.; ŠPERKA, P.; POŘÍZKA, P.; KANICKÝ, V.; DE GIACOMO, A.; KAISER, J. Influence of sample surface topography on laser ablation process. Talanta, 2021, vol. 222, no. 121512, p. 1-9. ISSN: 0039-9140.
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  HOOKE, CH., ŠPERKA, P., BAIR, S., MORALES-ESPEJEL, G.E. A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2021, vol. 235, no. 4, p. 870-880. ISSN: 1350-6501.
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• 2020

  PROCHAZKA, D.; POŘÍZKA, P.; NOVOTNÝ, J.; HRDLIČKA, A.; NOVOTNÝ, K.; ŠPERKA, P.; KAISER, J. Triple-pulse LIBS: Laser-induced breakdown spectroscopy signal enhancement by combination of pre-ablation and re-heating laser pulses. Journal of Analytical Atomic Spectrometry, 2020, vol. 35, no. 2, p. 293-300. ISSN: 1364-5544.
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  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.
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  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I. Příspěvek v rámci mezinárodní odborné konference. 2020.
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  ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication. Lubricants, 2020, vol. 8, no. 2, p. 1-11. ISSN: 2075-4442.
  Detail | WWW | Full text in the Digital Library

• 2019

  FRÝZA, J.; KROUPA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Investigation of film thickness of grease-lubricated thrust bearing: From ball-on-disc to bearing. In Proceedings on Engineering Sciences. Proceedings on Engineering Sciences - 16th International Conference on Tribology. 1. Kragujevac, Serbia: University of Kragujevac, Faculty of Engineering, 2019. p. 550-554. ISSN: 2620-2832.
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  KŘUPKA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Lubrication of rolling - sliding polymer contacts. In Engineering Mechanics 2019. Engineering Mechanics .... First edition. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague, 2019. p. 219-222. ISBN: 978-80-87012-71-0. ISSN: 1805-8256.
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  ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Dynamic friction measurement of EHL contact with artificial roughness. ECOTRIB 2019, 7th European Conference on Tribology. The Austrian Tribology Society, 2019. p. 34-34. ISBN: 978-3-901657-60-3.
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• 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.
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  NEČAS, D.; JAROŠ, T.; DOČKAL, K.; ŠPERKA, P.; VRBKA, M.; KŘUPKA, I.; HARTL, M. The effect of kinematic conditions on film thickness in compliant lubricated contact. ASME Transaction, Journal of Tribology, 2018, vol. 140, no. 5, p. 1-8. ISSN: 0742-4787.
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  EBNER, M; OMASTA, M.; LOHNER, T; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.; MICHAELIS, K.; HOHN, R-B.; STAHL, K. Local Effects in EHL Contacts with Oil-Impregnated Sintered Materials. Lubricants, 2018, vol. 7, no. 1, p. 1-21. ISSN: 2075-4442.
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  OMASTA, M.; ADAM, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. On the Temperature and Lubricant Film Thickness Distribution in EHL Contacts with Arbitrary Entrainment. Lubricants, 2018, vol. 6, no. 4, p. 1-12. ISSN: 2075-4442.
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  OMASTA, M.; EBNER, M.; ŠPERKA, P.; LOHNER, T.; KŘUPKA, I.; HARTL, M.; HOEHN, B-R.; STAHL, K. Film formation in EHL contacts with oil-impregnated sintered materials. INDUSTRIAL LUBRICATION AND TRIBOLOGY, 2018, vol. 70, no. 4, p. 612-619. ISSN: 0036-8792.
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  KANETA, M.; KŘUPKA, I.; ŠPERKA, P.; HARTL, M.; YANG, P.; YANG, P. Thermal Elastohydrodynamic Lubrication of Ceramic Materials. TRIBOLOGY TRANSACTIONS, 2018, vol. 61, no. 5, p. 868-878. ISSN: 1040-2004.
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  SALAJKOVÁ, Z.; HOLÁ, M.; HRDLIČKA, A.; POŘÍZKA, P.; NOVOTNÝ, K.; ČELKO, L.; ŠPERKA, P.; PROCHAZKA, D.; NOVOTNÝ, J.; MODLITBOVÁ, P.; KANICKÝ, V.; KAISER, J. Feasibility of nanoparticles enhanced laser ablation inductively coupled plasma mass spectrometry. 2018. p. 109-109.
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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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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Roughness effects in concentrated contact from full to mixed lubrication. In PROCEEDINGS OF ASIA INTERNATIONAL CONFERENCE ON TRIBOLOGY 2018 (ASIATRIB 2018). MALAYSIA: MALAYSIAN TRIBOLOGY SOC-MYTRIBOS, 2018. p. 171-172. ISBN: 978-967-13625-2-5.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Analytical Formula for the Ratio of Central to Minimum Film Thickness in a Circular EHL Contact. Lubricants, 2018, vol. 6, no. 3, p. 1-11. ISSN: 2075-4442.
  Detail | WWW | Full text in the Digital Library

  HOLÁ, M.; SALAJKOVÁ, Z.; HRDLIČKA, A.; POŘÍZKA, P.; NOVOTNÝ, K.; ČELKO, L.; ŠPERKA, P.; PROCHAZKA, D.; NOVOTNÝ, J.; MODLITBOVÁ, P.; KANICKÝ, V.; KAISER, J. Feasibility of Nanoparticle-Enhanced Laser Ablation Inductively Coupled Plasma Mass Spectrometry. Analytical Chemistry, 2018, no. 8, p. 1-6. ISSN: 1520-6882.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effects of lateral harmonic vibrations on film thickness in EHL point contacts. Tribology International, 2018, vol. 117, no. 1, p. 236-249. ISSN: 0301-679X.
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  ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The effect of surface roughness on friction and film thickness in transition from EHL to mixed lubrication. TRIBOLOGY INTERNATIONAL, 2018, vol. 128, no. 1, p. 356-364. ISSN: 1879-2464.
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• 2017

  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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  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

  FICZA, I.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effect of Kinematic Operating Conditions on Ridge Deformation—Numerical Study With Experimental Comparison. ASME Transaction, Journal of Tribology, 2017, vol. 139, no. 3, p. 031502-031509. ISSN: 0742-4787.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Prediction of Shallow Indentation Effects in a Rolling-Sliding EHL Contact Based on Amplitude Attenuation Theory. Tribology Online, 2017, vol. 12, no. 1, p. 1-7. ISSN: 1881-2198.
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  ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The effect of surface grooves on transition to mixed lubrication. Tribology International, 2017, vol. 114, no. 1, p. 409-417. ISSN: 0301-679X.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Viscoelastic response of lubricant in an EHL contact under transient bi- directional shear loading. Atlanta, Georgia, USA: Society of Tribologists and Lubrication Engineers, 2017.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Frictional response of lubricant in EHL contact under transient bi-directional shear loading. Tribology in Industry, 2017, vol. 39, no. 4, p. 506-518. ISSN: 0354-8996.
  Detail | WWW | Full text in the Digital Library

  DOČKAL, K.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Fluid flow measurements of 5P4E by particle tracking velocimetry. In ENGINEERING MECHANICS 2017. Česká republika: Aakdemie věd ČR, Ústav termomechaniky, 2017. p. 274-277. ISBN: 978-80-214-5497-2.
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  HOUDKOVÁ, Š.; ŠPERKA, P.; REPKA, M.; MARTAN, J.; MOSKAL, D. Shifted laser surface texturing for bearings applications. In 6th International Conference on Fracture Fatigue and Wear 26–27 July 2017, Porto, Portugal. Journal of Physics: Conference Series. BRISTOL: IOP PUBLISHING LTD, 2017. p. 1-10. ISSN: 1742-6588.
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• 2016

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Transition from plug-flow to linear speed profile near a dent in a rolling–sliding EHL contact. Tribology International, 2016, vol. 100, no. 1, p. 344-350. ISSN: 0301-679X.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Lubricant flow in thin-film elastohydrodynamic contact under extreme conditions. Friction, 2016, vol. 4, no. 4, p. 380-390. ISSN: 2223-7690.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The effect of surface grooves on film breakdowns in point contacts. Tribology International, 2016, vol. 102, no. 1, p. 249-256. ISSN: 0301-679X.
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  ŠPERKA, P.; OMASTA, M.; KŘUPKA, I.; HARTL, M. Abnormal lubricant aggregation on roughness features in a rolling–sliding elastohydrodynamic contact. Tribology International, 2016, vol. 94, no. 1, p. 346-351. ISSN: 0301-679X.
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  BAIR, S.; HABCHI, W.; SPERKA, P.; HARTL, M. Quantitative elastohydrodynamic film forming for a gear oil with complex shear-thinning. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2016, vol. 230, no. 3, p. 289-299. ISSN: 1350-6501.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects. TRIBOLOGY TRANSACTIONS, 2016, vol. 59, no. 2, p. 277-285. ISSN: 1040-2004.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental Study of Roughness Effect in a Rolling–Sliding EHL Contact. Part I: Roughness Deformation. TRIBOLOGY TRANSACTIONS, 2016, vol. 59, no. 2, p. 267-276. ISSN: 1040-2004.
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  NEČAS, D.; VRBKA, M.; YARIMITSU, S.; NAKASHIMA, K.; SAWAE, Y.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Frictional properties of PVA hydrogel. In The Latest Methods of Construction Design. Springer International Publishing, 2016. p. 159-164. ISBN: 978-3-319-22761-0.
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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.
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  FRÝZA, J.; ŠPERKA, P.; KANETA, M.; KŘUPKA, I.; HARTL, M. Effects of lubricant rheology and impact speed on EHL film thickness at pure squeeze action. Tribology International, 2016, vol. 106, no. 2, p. 1-9. ISSN: 0301-679X.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effects of lateral vibrations on film thickness distribution in a point EHL contact. Hämeenlinna, Finland: Finnish Society for Tribology, 2016.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Surface Roughness Effects under High Sliding EHL Conditions. Tribology Online, 2016, vol. 11, no. 1, p. 34-39. ISSN: 1881-218X.
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  KŘUPKA, I.; ŠPERKA, P.; HARTL, M. Effect of surface roughness on lubricant film breakdown and transition from EHL to mixed lubrication. Tribology International, 2016, vol. 100, no. 1, p. 116-125. ISSN: 0301-679X.
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• 2015

  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Roughness Effects in Impact EHL of Elliptical Contacts. Tokyo: Japanese Society of Tribologists, 2015. p. 971-972.
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  NEČAS, D.; ŠPERKA, P.; VRBKA, M.; KŘUPKA, I.; HARTL, M. Film thickness mapping in lubricated contacts using fluorescence. MM Science Journal, 2015, vol. 4, no. 4, p. 821-824. ISSN: 1803-1269.
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  POŘÍZKA, P.; ROČŇÁKOVÁ, I.; KLUS, J.; PROCHAZKA, D.; SLÁDKOVÁ, L.; ŠPERKA, P.; SPOTZ, Z.; ČELKO, L.; NOVOTNÝ, K.; KAISER, J. Estimating the grade of Mg corrosion using Laser-Induced Breakdown Spectroscopy. Journal of Analalytical Atomic Spectrometry, 2015, vol. 2015, no. 7, p. 2099-2106. ISSN: 0267-9477.
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  GALAS, R.; ŠPERKA, P.; OMASTA, M.; HARTL, M.; KŘUPKA, I. Investigation of the Lubricant Fluid- Flow in EHL Contact using Particle Tracking. In Book of Proceedings of 56th International Conference of Machine Design Departments. First. Nitra: Slovak University of Agriculture in Nitra, 2015. p. 353-356. ISBN: 978-80-552-1377- 4.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Behaviour of EHL Films under Lateral Vibrations. In Book of Proceedings of 56th International Conference of Machine Design Departments. First. Nitra: Slovak University of Agriculture in Nitra, 2015. p. 349-352. ISBN: 978-80-552-1377- 4.
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  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.
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  GALAS, R.; ŠPERKA, P.; OMASTA, M.; HARTL, M.; KŘUPKA, I. Investigation of the Lubricant Fluid- Flow in EHL Contact using Particle Tracking. Machine Design. Scholar' s Press, 2015. ISBN: 978-3-639-66914- 5.
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  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.
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  WANG, J.; LUBRECHT, AA.; ŠPERKA, P.; OMASTA, M.; KANETA, M. Effect of high slide-roll ratio on thermal elastohydrodynamic lubrication in line contacts with surface waviness. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2015, vol. 229, no. 5, p. 568-577. ISSN: 1350-6501.
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  FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Behaviour of EHL Films under Lateral Vibrations. Scholar' s Press, 2015.
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• 2014

  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.
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  JANALIK, P.; FICHTER, T.; ŠPERKA, P.; OMASTA, M.; RAUSER, P. Three- dimensional optical assessment of experimental iatrogenic mechanical damage to canine dental enamel caused by a sonic scaler. Veterinární medicína, 2014, vol. 59, no. 6, p. 293-298. ISSN: 0375- 8427.
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  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Evidence of Plug Flow in Rolling-Sliding Elastohydrodynamic Contact. Tribology Letters, 2014, vol. 54, no. 2, p. 151-160. ISSN: 1023-8883.
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  HARTL, M.; KŘUPKA, I.; OMASTA, M.; ŠPERKA, P. Recent Advances and Problems in Lubricated Hertzian Contacts. In Engineering Mechanics 2014. Svratka: Brno University of Technology, 2014. p. 34-38. ISBN: 978-80-214-4871-1.
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  NEČAS, D.; VRBKA, M.; YARIMITSU, S.; NAKASHIMA, K.; SAWAE, Y.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Frictional Properties of PVA Hydrogel. In 55th International Conference of Machine Design Departments. 2014. p. 147-152. ISBN: 978-80-01-05542- 7.
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  KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Mechanismy mazání valivých ložisek. In 2014. p. 30-32.
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  FICZA, I.; ŠPERKA, P.; HARTL, M. Transient Calculations in Elastohydrodynamically Lubricated Point Contacts. Engineering Mechanics, 2014, vol. 2014 (21), no. 5, p. 311-319. ISSN: 1805- 4633.
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  KANETA, M.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Ehl traction analysis of perfluoropolyether fluids based on bulk modulus. Tribologia: Finnish Journal of Tribology, 2014, vol. 32, no. 2, p. 29-37. ISSN: 0780-2285.
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  HARTL, M.; KŘUPKA, I.; OMASTA, M.; ŠPERKA, P. RECENT ADVANCES AND PROBLEMS IN LUBRICATED HERTZIAN CONTACTS. In ENGINEERING MECHANICS 2014. Engineering mechanics 2014. Engineering Mechanics. Svratka, Česká Republika.: Czech Society for Mechanics, 2014. p. 34-37. ISBN: 978-80-214-4871-1. ISSN: 1805-8248.
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  KŘUPKA, I.; ŠPERKA, P. Vývoj a konstrukce experimentálního zařízení pro studium mazacích filmů. 2014. p. 1-5.
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  NEČAS, D.; VRBKA, M.; ŠPERKA, P.; DRUCKMÜLLER, M.; SKLÁDAL, P.; ŠTARHA, P.; KŘUPKA, I.; HARTL, M. Qualitative Analysis of Film Thickness in Rolling EHD Contact by Fluorescence Technique. In Modern Methods of Construction Design. Lecture Notes in Mechanical Engineering. Springer International Publishing, 2014. p. 615-622. ISBN: 978-3-319-05202- 1. ISSN: 2195- 4356.
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• 2013

  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.
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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.
  Detail

  BIBOULET, N.; ŠPERKA, P.; VENNER, CH.; LUBRECHT, T.; KŘUPKA, I. Obtaining the pressure spike and maximum shear stress from optical interferometry data. Tribology International, 2013, vol. 65, no. 6, p. 1-7. ISSN: 0301- 679X.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Surface Roughness Effects in Thermal EHL Contacts. In Proceedings of the 5th World Tribology Congress. 2. Torino: Politecnico di Torino (DIMEAS), 2013. p. 1686-1688. ISBN: 9781634393522.
  Detail

  BAIR, S.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Quantitative elastohydrodynamic film thickness of mechanically degraded oil. Tribology International, 2013, vol. 65, no. 8, p. 33-38. ISSN: 0301- 679X.
  Detail

  NEČAS, D.; VRBKA, M.; ŠPERKA, P.; DRUCKMÜLLER, M.;SKLÁDAL, P.; ŠTARHA, P.; KŘUPKA, I.; HARTL, M. Qualitative Analysis of Film Thickness in Rolling EHD Contact by Fluorescence Technique. In Book of Proceedings of 54th International Conference of Machine Design Departments. Springer, 2013. p. 513-520. ISBN: 978-80-7372-986- 8.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Rapid Prediction of Roughness Effects in Sliding EHL Contacts. In Society of Tribologists & Lubrication Engineers Annual Meeting & Exhibition 2013 / Proceedings of a meeting held 5-9 May 2013, Detroit, Michigan, USA. Detroit: Society of Tribologists and Lubrication Engineers, 2013. p. 180-182. ISBN: 978-1-62993-289- 7.
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  VRBKA, M.; NÁVRAT, T.; KŘUPKA, I.; HARTL, M.; ŠPERKA, P.; GALLO, J. Study of film formation in bovine serum lubricated contacts under rolling/sliding conditions. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 2013, vol. 227, no. 5, p. 459-475. ISSN: 1350-6501.
  Detail

• 2012

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Prediction of Real Rough Surface Deformation in Pure Rolling EHL Contact: Comparison with Experiment. TRIBOLOGY TRANSACTIONS, 2012, vol. 55, no. 5, p. 698-704. ISSN: 1040- 2004.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study on analytical methods for roughness deformation description in EHL contacts. In PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE, IJTC 2012. Denver, CO: American Society of Mechanical Engineers, 2012. p. 123-125. ISBN: 978-0-7918-4508- 0.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of real roughness attenuation in rolling- sliding concentrated contacts. Tribology International, 2012, vol. 46, no. 1, p. 14-21. ISSN: 0301- 679X.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The Behavior of Surface Roughness in EHL Contacts Under Small Slide to Roll Ratios. Tribology Letters, 2012, vol. 47, no. 3, p. 357-366. ISSN: 1023-8883.
  Detail

• 2011

  SVOBODA, P.; VRBKA, M.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Study of Lubrication Film Formation in Ball Bearings Under Starved Conditions. In ASME/ STLE 2011 International Joint Tribology Conference. 1. Los Angeles, CA, USA: American Society of Mechanical Engineers, Tribology Division, TRIB, 2011. p. 183-185. ISBN: 978-0-7918-5474- 7.
  Detail

  VRBKA, M.; KŘUPKA, I.; SVOBODA, P.; ŠPERKA, P.; NÁVRAT, T.; HARTL, M.; NOHAVA, J. Effect of shot peening on rolling contact fatigue and lubricant film thickness within mixed lubricated non-conformal rolling/ sliding contacts. Tribology International, 2011, vol. 44, no. 12, p. 1726-1735. ISSN: 0301- 679X.
  Detail

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of artificial features attenuation in rolling/ sliding concentrated contacts. In ASME/ STLE 2011 International Joint Tribology Conference. 1. Los Angeles, CA, USA: ASME/ STLE, 2011. p. 135-137. ISBN: 978-0-7918-5474- 7.
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  VAVERKA, M.; VRBKA, M.; FICZA, I.; ŠPERKA, P. Numerical Investigation of the Influence of Surface Asperities on Tribological Parameters in Lubricated Point Contact. In Proceedings of the International Conference BALTTRIB 2011. Balttrib 2009 Conference proceedings. 6. Kaunas, Litva: Aleksandras Stulginskis University, 2011. p. 117-121. ISBN: 978-609-449-006- 4. ISSN: 1822- 8801.
  Detail

• 2010

  VAVERKA, M.; ZAPLETAL, L.; ŠPERKA, P.; VRBKA, M.; SVOBODA, P.; KŘUPKA, I. Vliv povrchových mikronerovností a defektů na rozložení kontaktního tlaku a tloušťky mazacího filmu za podmínek elastohydrodynamického mazání. In Failures of rolling bearings / Poruchy valivých ložísk. Bratislava: KONGRES Management, 2010. p. 55-58. ISBN: 978-80-89275-24- 3.
  Detail

  VRBKA, M.; ŠAMÁNEK, O.; ŠPERKA, P.; NÁVRAT, T.; KŘUPKA, I.; HARTL, M. Effect of surface texturing on rolling contact fatigue within mixed lubricated non-conformal rolling/ sliding contacts. Tribology International, 2010, vol. 43, no. 8, p. 1457-1465. ISSN: 0301- 679X.
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  SHEN, XJ.; CHEN, XY.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effect of real longitudinal surface roughness on lubrication film formation within line elastohydrodynamic contact. Tribology International, 2010, vol. 44, no. 3, p. 1-6. ISSN: 0301- 679X.
  Detail

• 2009

  ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of real roughness attenuation in concentrated contacts. Tribology International, 2009, vol. 42, no. 12, p. 1-9. ISSN: 0301- 679X.
  Detail

• 2007

  ŠPERKA, P.; HARTL, M. 3D optický profilometr pro mapování inženýrských povrchů. Konference diplomových prací 2007. 1. Ústav konstruování, fakulta strojního inženýrství, VUT v Brně: Ústav konstruování, 2007. p. 1-5. ISBN: 978-80-214-3406- 6.
  Detail

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