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Martin Hartl
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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

Polymer Lubrication: Pressure–Viscosity–Temperature Dependence of Film Thickness for Highly Loaded Compliant Contacts in Elastohydrodynamic Lubrication Regime

Jiri Krupka, Krystof Dockal, Ivan Krupka, Martin Hartl
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. February 2023, 145(2): 021601.
Paper No: TRIB-22-1245
https://doi.org/10.1115/1.4055558
Published Online: October 26, 2022
View Article titled, Polymer Lubrication: Pressure–Viscosity–Temperature Dependence of Film Thickness for Highly Loaded Compliant Contacts in Elastohydrodynamic Lubrication Regime
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Topics: Film thickness, Lubricants, Pressure, Stress, Temperature, Viscosity, Elastohydrodynamic lubrication, Polymers, Lubrication
Proceedings Papers

Numerical Study on Renewable and Sustainable Fuels for HPDF Engines

Stephanie G. Frankl, Alexander D. Gelner, Stephan Gleis, Martin Härtl, Georg Wachtmeister
Proc. ASME. POWER2020, ASME 2020 Power Conference, V001T03A007, August 4–5, 2020
Publisher: American Society of Mechanical Engineers
Paper No: POWER2020-16438
https://doi.org/10.1115/POWER2020-16438
View Paper titled, Numerical Study on Renewable and Sustainable Fuels for HPDF Engines
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Topics: Combustion, Engines, Fuels, High pressure (Physics), Internal combustion engines, Sustainability
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 of Lubrication Film Formation in Multiple Contacts Device Under Starved Conditions

Petr Svoboda, David Kostal, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 233-235, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61123
https://doi.org/10.1115/IJTC2012-61123
View Paper titled, Experimental Study of Lubrication Film Formation in Multiple Contacts Device Under Starved Conditions
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Topics: Lubrication, Film thickness, Computer simulation, Lubricants, Machine components, Bearings, Cams, Failure, Gears, Pressure
Proceedings Papers

Effect of Proteins on Film Formation in Bovine Serum Lubricated Contacts Under Rolling/Sliding Conditions

Martin Vrbka, Tomas Navrat, Ivan Krupka, Martin Hartl, Jiri Gallo
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 39-41, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61089
https://doi.org/10.1115/IJTC2012-61089
View Paper titled, Effect of Proteins on Film Formation in Bovine Serum Lubricated Contacts Under Rolling/Sliding Conditions
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Topics: Proteins, Film thickness, Disks, Artificial joints, Ceramics, Diluents, Glass, Interferometry, Lubrication, Metals
Proceedings Papers

The Contribution of a Sliding Velocity to EHL Film Thickness Distribution

Milan Omasta, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 107-109, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61133
https://doi.org/10.1115/IJTC2012-61133
View Paper titled, The Contribution of a Sliding Velocity to EHL Film Thickness Distribution
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Topics: Film thickness, Elastohydrodynamic lubrication, Interferometry, Thin films
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

Lubrication Film Thickness Behavior Under Transient Speed and Load Conditions

Martin Zimmerman, Ivan Krupka, Martin Hartl, Pavel Houska
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 189-191, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61143
https://doi.org/10.1115/IJTC2012-61143
View Paper titled, Lubrication Film Thickness Behavior Under Transient Speed and Load Conditions
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Topics: Film thickness, Lubrication, Stress, Transients (Dynamics), Lubricants, Ball bearings, Damage, Disks, Glass, Interferometry
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 Elastohydrodynamic Film Shape Under Different Directions of Velocity Vectors

Milan Omasta, Ivan Krupka, Martin Hartl
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 401-403, October 24–26, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2011-61259
https://doi.org/10.1115/IJTC2011-61259
View Paper titled, Study of Elastohydrodynamic Film Shape Under Different Directions of Velocity Vectors
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Topics: Film thickness, Gears, Glass, Interferometry, Machinery, Shapes, Spiral bevel gears, Steel, Thin films
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
Proceedings Papers

Effect of Surface Texturing on EHD Lubrication Films Under Transient Speed Condition

Martin Zimmerman, Ivan Krupka, Martin Hartl, Pavel Houska
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 187-189, October 24–26, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2011-61046
https://doi.org/10.1115/IJTC2011-61046
View Paper titled, Effect of Surface Texturing on EHD Lubrication Films Under Transient Speed Condition
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Topics: Lubrication, Transients (Dynamics), Lubricants, Film thickness, Cams, Damage, Disks, Gears, Glass, Interferometry
Proceedings Papers

Effect of Surface Topography on Mixed Lubrication Film Under Transient Conditions

Ivan Krupka, Martin Hartl, Petr Svoboda
Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 481-482, October 19–21, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2009-15050
https://doi.org/10.1115/IJTC2009-15050
View Paper titled, Effect of Surface Topography on Mixed Lubrication Film Under Transient Conditions
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Topics: Lubrication, Transients (Dynamics), Damage, Gears, Machine components, Risk, Rolling bearings, Stress, Surface roughness
Proceedings Papers

Optimized Mapping of Pressure in Lubricated Point Contacts Based on Measured Film Thickness

Radek Polisˇcˇuk, Michal Vaverka, Martin Vrbka, Ivan Krˇupka, Martin Hartl
Proc. ASME. IMECE2007, Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B, 1-6, November 11–15, 2007
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2007-41382
https://doi.org/10.1115/IMECE2007-41382
View Paper titled, Optimized Mapping of Pressure in Lubricated Point Contacts Based on Measured Film Thickness
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Topics: Film thickness, Pressure, Lubricants, Fatigue, Wear, Cams, Elasticity, Friction, Gears, Interferometry
Journal Articles

The Shear-Thinning Elastohydrodynamic Film Thickness of a Two-Component Mixture

Yuchuan Liu, Q. Jane Wang, Ivan Krupka, Martin Hartl, Scott Bair
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 2008, 130(2): 021502.
https://doi.org/10.1115/1.2842298
Published Online: March 20, 2008
View Article titled, The Shear-Thinning Elastohydrodynamic Film Thickness of a Two-Component Mixture
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Topics: Film thickness, Lubricants, Rheology, Shear (Mechanics), Viscosity, Pressure, Simulation, Oils, Petroleum, Friction
Proceedings Papers

Pressure Distribution Within EHD Point Contacts Based on Measured Film Thickness

Radek Poliscuk, Michal Vaverka, Martin Vrbka, Ivan Krupka, Martin Hartl
Proc. ASME. IMECE2006, Tribology, 55-61, November 5–10, 2006
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2006-13546
https://doi.org/10.1115/IMECE2006-13546
View Paper titled, Pressure Distribution Within EHD Point Contacts Based on Measured Film Thickness
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Topics: Film thickness, Pressure, Lubricants, Deformation, Machine components, Wear, Fatigue, Cams, Elasticity, Flow (Dynamics)