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Petr Šperka
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Journal Articles

Influence of Free Water Droplets on Film Formation Under Point Contact Grease Lubrication

Yiming Han, Petr Sperka, Jing Wang, Ivan Krupka, Martin Hartl, Weimin Li, Xiaobo Wang, Weimin Liu
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 2023, 145(7): 074101.
Paper No: TRIB-22-1390
https://doi.org/10.1115/1.4056944
Published Online: April 25, 2023
View Article titled, Influence of Free Water Droplets on Film Formation Under Point Contact Grease Lubrication
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Topics: Film thickness, Water, Reciprocating motion, Lubrication, Drops, Cycles
Journal Articles

The Effect of Kinematic Conditions on Film Thickness in Compliant Lubricated Contact

David Nečas, Tomáš Jaroš, Kryštof Dočkal, Petr Šperka, Martin Vrbka, Ivan Křupka, Martin Hartl
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. September 2018, 140(5): 051501.
Paper No: TRIB-17-1211
https://doi.org/10.1115/1.4039529
Published Online: April 10, 2018
View Article titled, The Effect of Kinematic Conditions on Film Thickness in Compliant Lubricated Contact
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Topics: Disks, Film thickness, Kinematics, Lubricants, Lubrication, Viscosity
Journal Articles

Influence of Lubricant Inlet Film Thickness on Elastohydrodynamically Lubricated Contact Starvation

David Kostal, Petr Sperka, Petr Svoboda, Ivan Krupka, Martin Hartl
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. September 2017, 139(5): 051503.
Paper No: TRIB-16-1276
https://doi.org/10.1115/1.4035777
Published Online: May 26, 2017
View Article titled, Influence of Lubricant Inlet Film Thickness on Elastohydrodynamically Lubricated Contact Starvation
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Topics: Film thickness, Lubricants
Journal Articles

Effect of Kinematic Operating Conditions on Ridge Deformation—Numerical Study With Experimental Comparison

Ildikó Ficza, Petr Šperka, Ivan Křupka, Martin Hartl
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. May 2017, 139(3): 031502.
Paper No: TRIB-15-1403
https://doi.org/10.1115/1.4034764
Published Online: November 30, 2016
View Article titled, Effect of Kinematic Operating Conditions on Ridge Deformation—Numerical Study With Experimental Comparison
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Topics: Deformation, Engineering simulation, Film thickness, Kinematics, Pressure, Rheology, Simulation, Surface roughness, Lubricants, Computer simulation
Proceedings Papers

Experimental Study on Analytical Methods for Roughness Deformation Description in EHL Contacts

Petr Sperka, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 123-125, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61175
https://doi.org/10.1115/IJTC2012-61175
View Paper titled, Experimental Study on Analytical Methods for Roughness Deformation Description in EHL Contacts
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Topics: Analytical methods, Deformation, Surface roughness, Geometry, Tribology, Film thickness, Fourier analysis, Lubricants, Machine components
Proceedings Papers

Experimental Study of Artificial Features Attenuation in Rolling/Sliding Concentrated Contacts

Petr Sperka, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 135-137, October 24–26, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2011-61068
https://doi.org/10.1115/IJTC2011-61068
View Paper titled, Experimental Study of Artificial Features Attenuation in Rolling/Sliding Concentrated Contacts
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Topics: Design, Disks, High pressure (Physics), Interferometry, Machine components, Surface roughness, Thin films, Tribometers
Proceedings Papers

Study of Lubrication Film Formation in Ball Bearings Under Starved Conditions

Petr Svoboda, Martin Vrbka, Petr Sperka, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 183-185, October 24–26, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2011-61034
https://doi.org/10.1115/IJTC2011-61034
View Paper titled, Study of Lubrication Film Formation in Ball Bearings Under Starved Conditions
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Topics: Ball bearings, Lubrication, Lubricants, Disks, Film thickness, Machine components, Rolling bearings, Cams, Collapse, Engineering systems and industry applications