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H. Rahnejat
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Proceedings Papers

Constrained Multi-Body Dynamic Analysis of Shaft and Bearing Systems

F. Hoffmann, H. Rahnejat
Proc. ASME. IMECE2001, Vibration and Control of Mechanical Systems, 77-85, November 11–16, 2001
Paper No: IMECE2001/DE-23210
DOI: https://doi.org/10.1115/IMECE2001/DE-23210
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Topics: Bearings, Dynamic analysis, Dynamics (Mechanics), Spectra (Spectroscopy), Vacuum pumps, Vibration
Proceedings Papers

Elasto-Multi-Body Dynamics of Multi-Cylinder Internal Combustion Engine

S. Gupta, P. Kelly, H. Rahnejat
Proc. ASME. IMECE2001, Vibration and Control of Mechanical Systems, 273-281, November 11–16, 2001
Paper No: IMECE2001/DE-23234
DOI: https://doi.org/10.1115/IMECE2001/DE-23234
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Topics: Cylinders, Dynamics (Mechanics), Internal combustion engines, Vibration, Engines, Flywheels, Combustion, Cycles, Deflection, Diesel engines
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
Article Type: Research Papers
J. Tribol. November 2021, 143(11): 111901.
Paper No: TRIB-20-1476
DOI: https://doi.org/10.1115/1.4050017
Published Online: February 23, 2021
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Topics: Friction, Lubricants, Plasticizers, Temperature, Tribological films, Wear, Strips
Journal Articles

Hydrodynamic Lubricant Film Separation During Codirectional and Counter-Directional Rotations of Disengaged Wet Clutch Packs

N. J. Morris, R. Patel, H. Rahnejat
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. January 2020, 142(1): 011104.
Paper No: FE-19-1196
DOI: https://doi.org/10.1115/1.4044443
Published Online: October 4, 2019
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Topics: Boundary-value problems, Disks, Drag (Fluid dynamics), Flow (Dynamics), Friction, Lubricants, Rupture, Separation (Technology), Rotation, Torque
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
Article Type: Research-Article
J. Comput. Nonlinear Dynam. August 2019, 14(8): 081006.
Paper No: CND-19-1010
DOI: https://doi.org/10.1115/1.4043526
Published Online: May 13, 2019
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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
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2017, 139(6): 062801.
Paper No: GTP-16-1220
DOI: https://doi.org/10.1115/1.4035282
Published Online: January 24, 2017
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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
Article Type: Research-Article
J. Tribol. April 2016, 138(2): 021703.
Paper No: TRIB-15-1087
DOI: https://doi.org/10.1115/1.4031780
Published Online: November 4, 2015
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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
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2015, 137(3): 032512.
Paper No: GTP-14-1296
DOI: https://doi.org/10.1115/1.4028496
Published Online: October 14, 2014
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Topics: Compression, Cylinders, Dynamics (Mechanics), Engines, Friction, Lubricants, Pressure, Temperature, Transients (Dynamics), Tribology
Journal Articles

Multiphysics Investigations on the Dynamics of Differential Hypoid Gears

M. Mohammadpour, S. Theodossiades, H. Rahnejat
Journal: Journal of Vibration and Acoustics
Article Type: Research-Article
J. Vib. Acoust. August 2014, 136(4): 041007.
Paper No: VIB-13-1420
DOI: https://doi.org/10.1115/1.4027403
Published Online: April 30, 2014
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Topics: Bearings, Damping, Dynamics (Mechanics), Friction, Gears, Spiral bevel gears, Stiffness, Stress, Torque, Vehicles
Proceedings Papers

Prediction of Load and Shear of Ultra-Thin Multi-Species Surface Films

W. W. F. Chong, M. Teodorescu, H. Rahnejat
Proc. ASME. IDETC-CIE2012, Volume 5: 6th International Conference on Micro- and Nanosystems; 17th Design for Manufacturing and the Life Cycle Conference, 241-246, August 12–15, 2012
Paper No: DETC2012-71317
DOI: https://doi.org/10.1115/DETC2012-71317
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Topics: Shear (Mechanics), Stress, Thin films, Adhesion, Friction, Intermolecular forces, Microscale devices, Contact mechanics, Fluids, Liquid films
Proceedings Papers

The Role of Laser Surface Textured Patterns on Friction in Reciprocating Contacts

M. De la Cruz, M. Gore, N. Morris, H. Rahnejat
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 71-73, October 7–10, 2012
Paper No: IJTC2012-61149
DOI: https://doi.org/10.1115/IJTC2012-61149
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Topics: Friction, Lasers
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
Paper No: ICES2012-81021
DOI: https://doi.org/10.1115/ICES2012-81021
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Topics: Combustion, Combustion chambers, Compression, Cylinders, Flow (Dynamics), Friction, Gas flow, Gaussian distribution, Heat, Internal combustion engines
Proceedings Papers

Measurement of In-Cylinder Friction Using the Floating Liner Principle

M. Gore, S. J. Howell-Smith, P. D. King, H. Rahnejat
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 901-906, May 6–9, 2012
Paper No: ICES2012-81028
DOI: https://doi.org/10.1115/ICES2012-81028
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Topics: Cylinders, Friction, Engines, Lubrication, Pressure, Transients (Dynamics), Accelerometers, Bearings, Combustion, Design
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
Paper No: ICES2012-81050
DOI: https://doi.org/10.1115/ICES2012-81050
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Topics: Dynamics (Mechanics), Friction, Lubrication, Rollers, Trains, Valves
Proceedings Papers

Friction Under Transient Mixed Regime of Lubrication in Conjunction of an Elastic Ring Within a Real Cylinder

C. E. Baker, S. Theodossiades, H. Rahnejat
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 667-672, May 6–9, 2012
Paper No: ICES2012-81045
DOI: https://doi.org/10.1115/ICES2012-81045
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Topics: Cylinders, Friction, Lubrication, Transients (Dynamics), Compression, Engines, Manufacturing, Tribology, Arches, Circular cylinders
Proceedings Papers

Assessment of Thermo-Structural Effects on EHL Piston Skirt Lubrication

B. Littlefair, S. Howell-Smith, H. Rahnejat, S. Theodossiades
Proc. ASME. ICES2012, ASME 2012 Internal Combustion Engine Division Spring Technical Conference, 973-978, May 6–9, 2012
Paper No: ICES2012-81125
DOI: https://doi.org/10.1115/ICES2012-81125
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Topics: Lubrication, Pistons, Lubricants, Shapes, Stress, Cylinders, Deformation, Friction, Fuel efficiency, Operating temperature
Journal Articles

Influence of In-Plane Dynamics of Thin Compression Rings on Friction in Internal Combustion Engines

C. E. Baker, S. Theodossiades, H. Rahnejat, B. Fitzsimons
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Internal Combustion Engines
J. Eng. Gas Turbines Power. September 2012, 134(9): 092801.
DOI: https://doi.org/10.1115/1.4006690
Published Online: July 18, 2012
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Topics: Compression, Dynamics (Mechanics), Friction, Tribology, Lubrication, Pressure, Transients (Dynamics), Mode shapes, Engines
Proceedings Papers

Influence of Ultra-Thin Film Tribology on Hard Disk Areal Storage Capacity

W. W. F. Chong, M. Teodorescu, H. Rahnejat
Proc. ASME. IJTC2010, STLE/ASME 2010 International Joint Tribology Conference, 17-19, October 17–20, 2010
Paper No: IJTC2010-41128
DOI: https://doi.org/10.1115/IJTC2010-41128
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Topics: Disks, Storage, Tribology, Lubricants, Data storage systems, Density, Load bearing capacity, Cavitation, Fluids, Pressure
Proceedings Papers

Post-Angioplastic Contact Mechanics With Different Levels of Artherosclerotic Plaque

M. Teodorescu, H. Rahnejat, Moshe Brand, Jacob Rosen
Proc. ASME. IJTC2010, STLE/ASME 2010 International Joint Tribology Conference, 41-43, October 17–20, 2010
Paper No: IJTC2010-41145
DOI: https://doi.org/10.1115/IJTC2010-41145
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Topics: Contact mechanics, Geometry, Stents, Stress, Surgery
Proceedings Papers

Harmonic Analysis to Determine Contact Characteristics of Concentrated Counterformal Contacts

M. Teodorescu, H. Rahnejat, R. Gohar
Proc. ASME. ESDA2004, Volume 1, 663-668, July 19–22, 2004
Paper No: ESDA2004-58544
DOI: https://doi.org/10.1115/ESDA2004-58544
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Topics: Approximation, Bearings, Contact mechanics, Deformation, Elastic moduli, Elasticity, Elastohydrodynamic lubrication, Fatigue, Friction, Geometry