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Journal Articles

Air Foil Thrust and Journal Bearing Coatings: A Review

Nick Morris, Ramin Rahmani, Homer Rahnejat, Bharat Bhushan
Journal: Journal of Tribology
Publisher: ASME
Article Type: Review Articles
J. Tribol. January 2025, 147(1): 010801.
Paper No: TRIB-24-1099
https://doi.org/10.1115/1.4065986
Published Online: September 9, 2024
View Article titled, Air Foil Thrust and Journal Bearing Coatings: A Review
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Topics: Coatings, Foil bearings, Temperature, Thrust, Journal bearings, Coating processes
Journal Articles

Thermal Analysis of an Oil Jet-Dry Sump Transmission Gear Under Mixed-Elastohydrodynamic Conditions

Ehsan Fatourehchi, Hamed Shahmohamadi, Mahdi Mohammadpour, Ramin Rahmani, Stephanos Theodossiades, Homer Rahnejat
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. September 2018, 140(5): 051502.
Paper No: TRIB-17-1061
https://doi.org/10.1115/1.4039567
Published Online: April 26, 2018
View Article titled, Thermal Analysis of an Oil Jet-Dry Sump Transmission Gear Under Mixed-Elastohydrodynamic Conditions
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Topics: Energy dissipation, Gears, Heat, Lubricants, Temperature, Gear teeth, Friction
Proceedings Papers

Nonlinear Dynamics of an Automotive Differential Hypoid Gear Pair

Leonidas I. Paouris, Stephanos Theodossiades, Homer Rahnejat, Adam Kidson, Gregory Hunt, William Barton
Proc. ASME. IDETC-CIE2015, Volume 10: ASME 2015 Power Transmission and Gearing Conference; 23rd Reliability, Stress Analysis, and Failure Prevention Conference, V010T11A025, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-47324
https://doi.org/10.1115/DETC2015-47324
View Paper titled, Nonlinear Dynamics of an Automotive Differential Hypoid Gear Pair
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Topics: Nonlinear dynamics, Spiral bevel gears, Errors, Gears, Computer software, Cycles, Deflection, Degrees of freedom, Dynamics (Mechanics), Equations of motion
Proceedings Papers

Cavitating Flow in Engine Piston Ring-Cylinder Liner Conjunction

Hamed Shahmohamadi, Ramin Rahmani, Homer Rahnejat, Paul King, Colin Garner
Proc. ASME. IMECE2013, Volume 7A: Fluids Engineering Systems and Technologies, V07AT08A056, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-62395
https://doi.org/10.1115/IMECE2013-62395
View Paper titled, Cavitating Flow in Engine Piston Ring-Cylinder Liner Conjunction
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Topics: Cylinders, Engines, Flow (Dynamics), Pistons, Cavitation, Compression, Bearings, Bubbles, Computational fluid dynamics, Damage
Proceedings Papers

Tribo-Dynamics of Differential Hypoid Gears

Mahdi Mohammadpour, Stephanos Theodossiades, Homer Rahnejat
Proc. ASME. IDETC-CIE2013, Volume 5: 25th International Conference on Design Theory and Methodology; ASME 2013 Power Transmission and Gearing Conference, V005T11A016, August 4–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: DETC2013-12890
https://doi.org/10.1115/DETC2013-12890
View Paper titled, Tribo-Dynamics of Differential Hypoid Gears
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Topics: Dynamics (Mechanics), Spiral bevel gears, Friction, Dynamic response, Elastohydrodynamic lubrication, Geometry, Lubricants, Noise (Sound), Shear (Mechanics), Tribology
Proceedings Papers

Mechanisms of Entrapment and Release of Fluid Droplets From Nano-Scale Surface Features

William Chong, Mircea Teodorescu, Ashlie Martini, Homer Rahnejat
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 29-31, October 7–10, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2012-61201
https://doi.org/10.1115/IJTC2012-61201
View Paper titled, Mechanisms of Entrapment and Release of Fluid Droplets From Nano-Scale Surface Features
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Topics: Drops, Fluids, Nanoscale phenomena, Modeling, Simulation, Drug delivery systems, Drugs, Friction, Membranes, Molecular dynamics
Proceedings Papers

Meniscus Formation in the Piston Compression Ring-Cylinder Liner Inlet Zone

Ramin Rahmani, Gema Styles, Homer Rahnejat
Proc. ASME. ICEF2012, ASME 2012 Internal Combustion Engine Division Fall Technical Conference, 935-939, September 23–26, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2012-92123
https://doi.org/10.1115/ICEF2012-92123
View Paper titled, Meniscus Formation in the Piston Compression Ring-Cylinder Liner Inlet Zone
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Topics: Compression, Cylinders, Pistons, Lubricants, Lubrication, Clearances (Engineering), Kinematics, Solids, Bridges (Structures), Coatings
Proceedings Papers

Performance Evaluation of Piston Compression Ring Through Accelerated Wear in Engine Tests

Nicholas Morris, Homer Rahnejat, Ramin Rahmani, Paul King, Brian Fitzsimons
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 1003-1008, May 6–9, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICES2012-81201
https://doi.org/10.1115/ICES2012-81201
View Paper titled, Performance Evaluation of Piston Compression Ring Through Accelerated Wear in Engine Tests
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Topics: Compression, Engines, Performance evaluation, Pistons, Wear, Friction, Lubricants, Tribology, Bridges (Structures), Coating processes
Proceedings Papers

Rupture and Reformation of Ultra-Thin Surface Films

William W. F. Chong, Mircea Teodorescu, Homer Rahnejat
Proc. ASME. IDETC-CIE2010, Volume 4: 12th International Conference on Advanced Vehicle and Tire Technologies; 4th International Conference on Micro- and Nanosystems, 401-407, August 15–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: DETC2010-28427
https://doi.org/10.1115/DETC2010-28427
View Paper titled, Rupture and Reformation of Ultra-Thin Surface Films
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Topics: Rupture, Thin films, Lubricants, Disks, Cavitation, Data storage systems, Density, Drainage, Film thickness, Flow (Dynamics)
Proceedings Papers

The Influence of Post Angioplasty Stent Implant Profile on Arterial Wall Stress

Mircea Teodorescu, Moshe Brand, Jacob Rosen, Homer Rahnejat
Proc. ASME. IDETC-CIE2010, Volume 4: 12th International Conference on Advanced Vehicle and Tire Technologies; 4th International Conference on Micro- and Nanosystems, 413-420, August 15–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: DETC2010-29233
https://doi.org/10.1115/DETC2010-29233
View Paper titled, The Influence of Post Angioplasty Stent Implant Profile on Arterial Wall Stress
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Topics: Stents, Stress, Biomedicine, Catheters, Cross section (Physics), Power presses, Pressure, Shapes
Proceedings Papers

Nano-Scale Impact Dynamics of Ultra-Thin Bonded Layers

Mircea Teodorescu, Stephanos Theodossiades, Homer Rahnejat
Proc. ASME. IDETC-CIE2009, Volume 6: ASME Power Transmission and Gearing Conference; 3rd International Conference on Micro- and Nanosystems; 11th International Conference on Advanced Vehicle and Tire Technologies, 367-373, August 30–September 2, 2009
Publisher: American Society of Mechanical Engineers
Paper No: DETC2009-87667
https://doi.org/10.1115/DETC2009-87667
View Paper titled, Nano-Scale Impact Dynamics of Ultra-Thin Bonded Layers
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Topics: Dynamics (Mechanics), Nanoscale phenomena
Proceedings Papers

Nano- and Component Level Friction of Rubber Seals in Dispensing Devices

Polina Prokopovich, Stephanos Theodossiades, Homer Rahnejat, Darren Hodson
Proc. ASME. IDETC-CIE2009, Volume 6: ASME Power Transmission and Gearing Conference; 3rd International Conference on Micro- and Nanosystems; 11th International Conference on Advanced Vehicle and Tire Technologies, 339-344, August 30–September 2, 2009
Publisher: American Society of Mechanical Engineers
Paper No: DETC2009-86035
https://doi.org/10.1115/DETC2009-86035
View Paper titled, Nano- and Component Level Friction of Rubber Seals in Dispensing Devices
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Topics: Adhesion, Friction, Rubber, Valves
Proceedings Papers

The Effect of Thermo-Hydrodynamics on Manual Automotive Transmissions Gear Rattle

Miguel De la Cruz, Stephanos Theodossiades, Homer Rahnejat, Patrick Kelly
Proc. ASME. IDETC-CIE2009, Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B, 373-379, August 30–September 2, 2009
Publisher: American Society of Mechanical Engineers
Paper No: DETC2009-87226
https://doi.org/10.1115/DETC2009-87226
View Paper titled, The Effect of Thermo-Hydrodynamics on Manual Automotive Transmissions Gear Rattle
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Topics: Automotive transmissions, Gears, Thermohydrodynamics, Bearings, Creep, Engines, Friction, Lubricants, Cycles, Gear teeth
Proceedings Papers

Nano-Scale Impact Characteristics of Rough Surfaces in Humid Atmosphere With Full or Partial SAM Protection

Mircea Teodorescu, Stephanos Theodossiades, Homer Rahnejat
Proc. ASME. IDETC-CIE2008, Volume 4: 20th International Conference on Design Theory and Methodology; Second International Conference on Micro- and Nanosystems, 561-568, August 3–6, 2008
Publisher: American Society of Mechanical Engineers
Paper No: DETC2008-49949
https://doi.org/10.1115/DETC2008-49949
View Paper titled, Nano-Scale Impact Characteristics of Rough Surfaces in Humid Atmosphere With Full or Partial SAM Protection
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Topics: Nanoscale phenomena, Surface roughness, Adhesion, Design, Dynamics (Mechanics), Microscale devices, Physics
Proceedings Papers

Effect of Surface Roughness on Adhesion and Friction of Microfibers in Side Contact

Mircea Teodorescu, Carmel Majidi, Homer Rahnejat, Ronald S. Fearing
Proc. ASME. IJTC2008, STLE/ASME 2008 International Joint Tribology Conference, 79-81, October 20–22, 2008
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2008-71215
https://doi.org/10.1115/IJTC2008-71215
View Paper titled, Effect of Surface Roughness on Adhesion and Friction of Microfibers in Side Contact
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Topics: Adhesion, Friction, Polyester fibers, Surface roughness, Approximation, Contact mechanics
Proceedings Papers

Nano-Scale Contact Model for Microfiber Tip Attachment, Detachment and Friction

Mircea Teodorescu, Homer Rahnejat
Proc. ASME. IJTC2008, STLE/ASME 2008 International Joint Tribology Conference, 83-85, October 20–22, 2008
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2008-71220
https://doi.org/10.1115/IJTC2008-71220
View Paper titled, Nano-Scale Contact Model for Microfiber Tip Attachment, Detachment and Friction
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Topics: Deflection, Equilibrium (Physics), Fibers, Friction, Nanoscale phenomena, Polyester fibers, Synthetic fibers
Proceedings Papers

On the Effect of Cardboard Liners on Impact-Induced High Frequency Vehicular Driveline Vibrations

Stephanos Theodossiades, Homer Rahnejat, Patrick Kelly
Proc. ASME. IDETC-CIE2007, Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C, 535-539, September 4–7, 2007
Publisher: American Society of Mechanical Engineers
Paper No: DETC2007-35692
https://doi.org/10.1115/DETC2007-35692
View Paper titled, On the Effect of Cardboard Liners on Impact-Induced High Frequency Vehicular Driveline Vibrations
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Topics: Paperboard, Vibration, Noise (Sound), Automobiles, Diluents, Elastic moduli, Finite element analysis, Flywheels, Impulse (Physics), Noise control