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R. Rahmani
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Journal Articles

Effect of Dispersant Concentration With Friction Modifiers and Anti-Wear Additives on the Tribofilm Composition and Boundary Friction

J. Umer, N. J. Morris, R. Rahmani, H. Rahnejat, S. Howell-Smith, S. Balakrishnan
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. November 2021, 143(11): 111901.
Paper No: TRIB-20-1476
https://doi.org/10.1115/1.4050017
Published Online: February 23, 2021
View Article titled, Effect of Dispersant Concentration With Friction Modifiers and Anti-Wear Additives on the Tribofilm Composition and Boundary Friction
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Topics: Friction, Lubricants, Plasticizers, Temperature, Tribological films, Wear, Strips
Journal Articles

In-Plane and Out-of-Plane Elastodynamics of Thin Rings and Seals

R. Turnbull, R. Rahmani, H. Rahnejat
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. August 2019, 14(8): 081006.
Paper No: CND-19-1010
https://doi.org/10.1115/1.4043526
Published Online: May 13, 2019
View Article titled, In-Plane and Out-of-Plane Elastodynamics of Thin Rings and Seals
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Topics: Compression, Dynamics (Mechanics), Elastodynamics, Pistons, Stiffness, Vibration, Frequency response, Friction, Internal combustion engines
Journal Articles

On the Transient Three-Dimensional Tribodynamics of Internal Combustion Engine Top Compression Ring

C. Baker, S. Theodossiades, R. Rahmani, H. Rahnejat, B. Fitzsimons
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2017, 139(6): 062801.
Paper No: GTP-16-1220
https://doi.org/10.1115/1.4035282
Published Online: January 24, 2017
View Article titled, On the Transient Three-Dimensional Tribodynamics of Internal Combustion Engine Top Compression Ring
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Topics: Compression, Cylinders, Dynamics (Mechanics), Engines, Friction, Lubricants, Pistons, Pressure, Transients (Dynamics), Temperature
Journal Articles

A Numerical Model to Study the Role of Surface Textures at Top Dead Center Reversal in the Piston Ring to Cylinder Liner Contact

N. Morris, R. Rahmani, H. Rahnejat, P. D. King, S. Howell-Smith
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. April 2016, 138(2): 021703.
Paper No: TRIB-15-1087
https://doi.org/10.1115/1.4031780
Published Online: November 4, 2015
View Article titled, A Numerical Model to Study the Role of Surface Textures at Top Dead Center Reversal in the Piston Ring to Cylinder Liner Contact
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Topics: Compression, Cylinders, Engines, Friction, Lubricants, Pistons, Pressure, Lubrication, Piston rings, Surface texture
Journal Articles

On the Effect of Transient In-Plane Dynamics of the Compression Ring Upon Its Tribological Performance

C. Baker, R. Rahmani, S. Theodossiades, H. Rahnejat, B. Fitzsimons
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2015, 137(3): 032512.
Paper No: GTP-14-1296
https://doi.org/10.1115/1.4028496
Published Online: October 14, 2014
View Article titled, On the Effect of Transient In-Plane Dynamics of the Compression Ring Upon Its Tribological Performance
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Topics: Compression, Cylinders, Dynamics (Mechanics), Engines, Friction, Lubricants, Pressure, Temperature, Transients (Dynamics), Tribology
Proceedings Papers

Prediction of Ring-Bore Conformance and Contact Condition and Experimental Validation

M. Theaker, R. Rahmani, H. Rahnejat
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 885-892, May 6–9, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICES2012-81021
https://doi.org/10.1115/ICES2012-81021
View Paper titled, Prediction of Ring-Bore Conformance and Contact Condition and Experimental Validation
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Topics: Combustion, Combustion chambers, Compression, Cylinders, Flow (Dynamics), Friction, Gas flow, Gaussian distribution, Heat, Internal combustion engines
Proceedings Papers

Assessment of Friction for Cam-Roller Follower Valve Train System Subjected to Mixed Non-Newtonian Regime of Lubrication

A. Turturro, R. Rahmani, H. Rahnejat, C. Delprete, L. Magro
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 917-923, May 6–9, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICES2012-81050
https://doi.org/10.1115/ICES2012-81050
View Paper titled, Assessment of Friction for Cam-Roller Follower Valve Train System Subjected to Mixed Non-Newtonian Regime of Lubrication
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Topics: Dynamics (Mechanics), Friction, Lubrication, Rollers, Trains, Valves