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FME, IMID DT – Assistant professor
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2026
OMASTA, M.; KNOTH, T.; ŠPERKA, P.; HAJZMAN, M.; KŘUPKA, I.; POLACH, P.; HARTL, M. Experimental Study of the Effect of Surface Texture in Sliding Contacts Using Infrared Thermography. Lubricants, 2026, vol. 14, iss. 2, p. 1-27.
WoS Article
POLÁČEK, T.; KADLEC, M.; SMILEK, J.; HARTL, M.; ŠPERKA, P. Superlubricity of polyethylene glycol solutions: Running-in effects, thickness changes, and rheology. Friction, 2026, vol. 14, iss. 2, p. 1-15.
ŠPERKA, P.; KNOTEK, J.; OMASTA, M.; KŘUPKA, I.; POLACH, P.; HARTL, M. Film Thickness and Friction of Textured Surfaces in Hydrodynamic Inclined and Parallel Gaps-An Experimental Study. Lubricants, 2026, vol. 14, iss. 1, p. 1-21.
2025
HABCHI, W.; ŠPERKA, P.; BAIR, S. On the Intricate Relation between Contact Aspect Ratio, High-Pressure Rheology, and Minimum Film Thickness in Elastohydrodynamic Conjunctions. Tribology letter, 2025, vol. 73, iss. 2, p. 1-10.
RADHAKRISHNAN, J.; ŠPERKA, P.; CORDOVILLA, F.; ANGULO, I.; OCANA, J. Understanding the Role of Laser Shock Processing and Micro-Texturing on the Tribological Performance of Ti-6Al-4V. International Journal of Precision Engineering and Manufacturing, 2025, iss. 12/2025, p. 1-15.
2024
HOLÁ, M.; SALAJKOVÁ, Z.; GREGAR, F.; ONDRÁČEK, J.; PAVLIŇÁK, D.; ŠPERKA, P.; HRDLIČKA, A.; KAISER, J.; KANICKÝ, V. Laser spot overlap in scanning laser ablation ICP-MS analysis: Impact on analytical signal and properties of the generated aerosol. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2024, vol. 219, iss. 106999, p. 1-13. ISSN: 1873-3565.
POLÁČEK, T.; ŠPERKA, P.; KŘUPKA, I. Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions. Friction, 2024, vol. 12, iss. 1, p. 164-173.
POUZAR, J.; KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of space lubricant evaporation in a high vacuum environment. Vacuum, 2024, vol. 219, iss. A, p. 1-7.
2023
HABCHI, W.; ŠPERKA, P.; BAIR, S. The role of the glass transition for EHL minimum film thickness. Tribology International, 2023, vol. 190, iss. 12, p. 1-8. ISSN: 0301-679X.
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, iss. 03, p. 1-22. ISSN: 0022-460X.
HABCHI, W.; ŠPERKA, P.; BAIR, S. Is Elastohydrodynamic Minimum Film Thickness Truly Governed by Inlet Rheology?. Tribology letter, 2023, vol. 71, iss. 3, p. 1-9. ISSN: 1023-8883.
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. JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, 2023, vol. 145, iss. 7, p. 074101-1 (074101-17 p.)ISSN: 0742-4787.
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 letter, 2023, vol. 71, iss. 1, p. 1-15. ISSN: 1023-8883.
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 letter, 2022, vol. 70, iss. 4, p. 1-16. ISSN: 1023-8883.
OKÁL, M.; KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effect of Contact Conformity on Grease Lubrication. Lubricants, 2022, vol. 10, iss. 11, p. 1-13. ISSN: 2075-4442.
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, iss. 1, p. 1-9. ISSN: 1873-3565.
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, iss. 12, p. 2477-2490. ISSN: 1350-6501.
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, iss. 1, p. 107340-107340. ISSN: 0301-679X.
PROCHÁZKA, J.; VILIŠ, J.; DOBROCKÝ, D.; ŠPERKA, P. Modification of Diffusion Layers by Laser Shock Peening. Manufacturing Technology, 2022, vol. 22, iss. 6, p. 724-732. ISSN: 1213-2489.
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, iss. May 2022, p. 67-79. ISSN: 0141-6359.
2021
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, iss. 4, p. 870-880. ISSN: 1350-6501.
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, iss. 121512, p. 1-9. ISSN: 0039-9140.
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, iss. 12, p. 2616-2625. ISSN: 1350-6501.
2020
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, iss. 2, p. 1-11. ISSN: 2075-4442.
KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I. Příspěvek v rámci mezinárodní odborné konference. 2020.
Paper in proceedings outside WoS and Scopus
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, iss. 1, p. 146-158. ISSN: 0354-8996.
Scopus Article
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, iss. 2, p. 293-300. ISSN: 1364-5544.
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. iss. 1, p. 550-554. ISSN: 2620-2832.
Paper in proceedings (conference paper)
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. iss. vol. 25, p. 219-222. ISBN: 978-80-87012-71-0. ISSN: 1805-8256.
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.ISBN: 978-3-901657-60-3.
Abstract
2018
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, iss. 4, p. 612-619. ISSN: 0036-8792.
KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Artificial Surface Roughness Deformation in the Starved EHL Contacts. Tribology Online, 2018, vol. 13, iss. 1, p. 1-7. ISSN: 1881-2198.
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, iss. 1, p. 236-249. ISSN: 0301-679X.
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.
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, iss. 3, p. 1-11. ISSN: 2075-4442.
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, iss. 4, p. 1-12. ISSN: 2075-4442.
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, iss. 1, p. 1-21. ISSN: 2075-4442.
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.
Conference proceedings
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. JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, 2018, vol. 140, iss. 5, p. 1-8. ISSN: 0742-4787.
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, iss. 1, p. 356-364. ISSN: 1879-2464.
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.
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, iss. 8, p. 1-6. ISSN: 1520-6882.
KANETA, M.; KŘUPKA, I.; ŠPERKA, P.; HARTL, M.; YANG, P.; YANG, P. Thermal Elastohydrodynamic Lubrication of Ceramic Materials. TRIBOLOGY TRANSACTIONS, 2018, vol. 61, iss. 5, p. 868-878. ISSN: 1040-2004.
2017
ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The effect of surface grooves on transition to mixed lubrication. Tribology International, 2017, vol. 114, iss. 1, p. 409-417. ISSN: 0301-679X.
KOŠŤÁL, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Influence of lubricant inlet film thickness on EHL contact starvation. JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, 2017, vol. 139, iss. 5, p. 1-10. ISSN: 0742-4787.
FICZA, I.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Effect of Kinematic Operating Conditions on Ridge Deformation—Numerical Study With Experimental Comparison. JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, 2017, vol. 139, iss. 3, p. 031502-031509. ISSN: 0742-4787.
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, iss. 1, p. 110-119. ISSN: 0354-8996.
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, iss. 4, p. 506-518. ISSN: 0354-8996.
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, iss. 1, p. 1-7. ISSN: 1881-2198.
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. iss. 012076, p. 1-10. ISSN: 1742-6588.
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.
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, iss. 1, p. 344-350. ISSN: 0301-679X.
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The effect of surface grooves on film breakdowns in point contacts. Tribology International, 2016, vol. 102, iss. 1, p. 249-256. ISSN: 0301-679X.
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.
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, iss. 2, p. 277-285. ISSN: 1040-2004.
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, iss. 1, p. 346-351. ISSN: 0301-679X.
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Lubricant flow in thin-film elastohydrodynamic contact under extreme conditions. Friction, 2016, vol. 4, iss. 4, p. 380-390. ISSN: 2223-7690.
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.
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, iss. 1, p. 116-125. ISSN: 0301-679X.
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, iss. 2, p. 1-9. ISSN: 0301-679X.
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, iss. 3, p. 289-299. ISSN: 1350-6501.
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Surface Roughness Effects under High Sliding EHL Conditions. Tribology Online, 2016, vol. 11, iss. 1, p. 34-39. ISSN: 1881-218X.
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, iss. 2, p. 267-276. ISSN: 1040-2004.
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.
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, iss. 5, p. 568-577. ISSN: 1350-6501.
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.
NEČAS, D.; ŠPERKA, P.; VRBKA, M.; KŘUPKA, I.; HARTL, M. Film thickness mapping in lubricated contacts using fluorescence. MM Science Journal, 2015, vol. 4, iss. 4, p. 821-824. ISSN: 1803-1269.
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 ANALYTICAL ATOMIC SPECTROMETRY, 2015, vol. 2015, iss. 7, p. 2099-2106. ISSN: 0267-9477.
KOŠŤÁL, D.; NEČAS, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Lubricant Rupture Ratio at Elastohydrodynamically Lubricated Contact Outlet. Tribology letter, 2015, vol. 59, iss. 3, p. 1 (jasne p.)ISSN: 1023-8883.
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.
KOŠŤÁL, D.; ŠPERKA, P.; SVOBODA, P.; KŘUPKA, I.; HARTL, M. Experimental observation of elastohydrodynamically lubricated contacts replenishment. MM Science Journal, 2015, iss. 2015/3, p. 640-644. ISSN: 1805-0476.
2014
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.
KOŠŤÁL, D.; ŠPERKA, P.; HARTL, M. Controlling and Measuring Starvation Severity in EHL Contacts. Engineering Mechanics, 2014, vol. 21, iss. 5, p. 321-328. ISSN: 1802-1484.
Peer-reviewed article not indexed in WoS or Scopus
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.
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.
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, iss. 6, p. 293-298. ISSN: 0375-8427.
FICZA, I.; ŠPERKA, P.; HARTL, M. Transient Calculations in Elastohydrodynamically Lubricated Point Contacts. Engineering Mechanics, 2014, vol. 2014 (21), iss. 5, p. 311-319. ISSN: 1805-4633.
HARTL, M.; KŘUPKA, I.; OMASTA, M.; ŠPERKA, P. RECENT ADVANCES AND PROBLEMS IN LUBRICATED HERTZIAN CONTACTS. In ENGINEERING MECHANICS 2014. Engineering Mechanics. Engineering Mechanics. Svratka, Česká Republika.: Czech Society for Mechanics, 2014. p. 34-37. ISBN: 978-80-214-4871-1. ISSN: 1805-8248.
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Evidence of Plug Flow in Rolling-Sliding Elastohydrodynamic Contact. Tribology letter, 2014, vol. 54, iss. 2, p. 151-160. ISSN: 1023-8883.
KOŠŤÁL, D.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Mechanismy mazání valivých ložisek. In 2014. s. 30-32.
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, iss. 2, p. 29-37. ISSN: 0780-2285.
2013
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.
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, iss. 5, p. 459-475. ISSN: 1350-6501.
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. s. 296-298. ISBN: 978-1-62993-289-7.
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, iss. 6, p. 1-7. ISSN: 0301-679X.
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.
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.
BAIR, S.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Quantitative elastohydrodynamic film thickness of mechanically degraded oil. Tribology International, 2013, vol. 65, iss. 8, p. 33-38. ISSN: 0301-679X.
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.
2012
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. The Behavior of Surface Roughness in EHL Contacts Under Small Slide to Roll Ratios. Tribology letter, 2012, vol. 47, iss. 3, p. 357-366. ISSN: 1023-8883.
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, iss. 5, p. 698-704. ISSN: 1040-2004.
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.
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of real roughness attenuation in rolling-sliding concentrated contacts. Tribology International, 2012, vol. 46, iss. 1, p. 14-21. ISSN: 0301-679X.
2011
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.
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, iss. 12, p. 1726-1735. ISSN: 0301-679X.
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. iss. 1, p. 117-121. ISBN: 978-609-449-006-4. ISSN: 1822-8801.
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.
2010
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, iss. 3, p. 1-6. ISSN: 0301-679X.
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. s. 55-58. ISBN: 978-80-89275-24-3.
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, iss. 8, p. 1457-1465. ISSN: 0301-679X.
2009
ŠPERKA, P.; KŘUPKA, I.; HARTL, M. Experimental study of real roughness attenuation in concentrated contacts. Tribology International, 2009, vol. 42, iss. 12, p. 1-9. ISSN: 0301-679X.
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. s. 1.ISBN: 978-80-214-3406-6.
KOPŘIVOVÁ, H.; FEDRA, V.; BUDAY, J.; HOLUB, D.; ŠPERKA, P.; VRLÍKOVÁ, L.; POŘÍZKA, P.; KAISER, J. COMPARATIVE EVALUATION OF LASER WAVELENGTHS FOR LIBS IN BIOMEDICAL APPLICATIONS. Book of abstracts of the 5th International Symposium on Advanced Measurement, Analysis and Control for Energy and Environment. ISBN: 978-80-214-6358-5.
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