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Journal Articles

Forensic Analysis of Surface Indentations in Rolling Contact

Xiaolan Ai, Carl Hager
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. January 2016, 138(1): 011101.
Paper No: TRIB-15-1084
https://doi.org/10.1115/1.4030713
Published Online: July 10, 2015
View Article titled, Forensic Analysis of Surface Indentations in Rolling Contact
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Topics: Bearings, Particulate matter, Particle size, Geometry, Friction, Materials properties, Modeling, Rolling bearings, Forensic sciences
Journal Articles

A Comprehensive Model for Assessing the Impact of Steel Cleanliness on Bearing Performance

Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. January 2015, 137(1): 011101.
Paper No: TRIB-14-1043
https://doi.org/10.1115/1.4028467
Published Online: October 3, 2014
View Article titled, A Comprehensive Model for Assessing the Impact of Steel Cleanliness on Bearing Performance
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Topics: Bearings, Steel, Stress
Proceedings Papers

A Power Dense Planetary Drive for Rotorcraft Applications

Xiaolan Ai, Curtis Orkin, Randy Kruse
Proc. ASME. IDETC-CIE2013, Volume 5: 25th International Conference on Design Theory and Methodology; ASME 2013 Power Transmission and Gearing Conference, V005T11A044, August 4–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: DETC2013-12220
https://doi.org/10.1115/DETC2013-12220
View Paper titled, A Power Dense Planetary Drive for Rotorcraft Applications
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Topics: Advanced materials, Aircraft, Bearings, Design, Engineers, Flow (Dynamics), Gears, Mechanical drives, Power density, Stress
Journal Articles

A High Ratio Power Dense Planetary Drive for Rotorcraft Applications

Xiaolan Ai, Curtis Orkin, Randy Kruse
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. February 2014, 136(2): 021010.
Paper No: MD-12-1558
https://doi.org/10.1115/1.4025967
Published Online: December 18, 2013
View Article titled, A High Ratio Power Dense Planetary Drive for Rotorcraft Applications
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Topics: Bearings, Design, Gears, Stress, Temperature programmed desorption
Journal Articles

An Efficient Numerical Method With a Parallel Computational Strategy for Solving Arbitrarily Shaped Inclusions in Elastoplastic Contact Problems

Zhanjiang Wang, Xiaoqing Jin, Qinghua Zhou, Xiaolan Ai, Leon M. Keer, Qian Wang
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. July 2013, 135(3): 031401.
Paper No: TRIB-12-1166
https://doi.org/10.1115/1.4023948
Published Online: March 28, 2013
View Article titled, An Efficient Numerical Method With a Parallel Computational Strategy for Solving Arbitrarily Shaped Inclusions in Elastoplastic Contact Problems
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Topics: Stress, Contact mechanics
Proceedings Papers

Stress Field Induced by a Stringer of Inhomogeneities in a Half Space

Kun Zhou, Leon M. Keer, Q. Jane Wang, Xiaolan Ai, Krich Sawamiphakdi, Peter Glaws
Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 337-339, October 19–21, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2009-15138
https://doi.org/10.1115/IJTC2009-15138
View Paper titled, Stress Field Induced by a Stringer of Inhomogeneities in a Half Space
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Topics: Stress, Corners (Structural elements), Friction, Stress concentration, Surfaces (Materials)
Proceedings Papers

Development of Friction Drive Transmission

Xiaolan Ai, Matthew Wilmer, David Lawrentz
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 201-202, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-63073
https://doi.org/10.1115/WTC2005-63073
View Paper titled, Development of Friction Drive Transmission
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Topics: Friction, Stiffness, Torque, Design, Motors, Rollers, Signals, Torquemeters, Wedges, Power density
Journal Articles

Development of Friction Drive Transmission

Xiaolan Ai, Matthew Wilmer, David Lawrentz
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 2005, 127(4): 857–864.
https://doi.org/10.1115/1.2032993
Published Online: February 18, 2005
View Article titled, Development of Friction Drive Transmission
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Topics: Friction, Torque, Stiffness, Wedges, Stress, Design
Journal Articles

Development of Zero-Spin Planetary Traction Drive Transmission: Part 1 — Design and Principles of Performance Calculation

Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 386–391.
https://doi.org/10.1115/1.1405130
Published Online: July 24, 2001
View Article titled, Development of Zero-Spin Planetary Traction Drive Transmission: Part 1 — Design and Principles of Performance Calculation
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Topics: Design, Rollers, Rotation, Torque, Traction, Stress, Particle spin, Spin (Aerodynamics), Friction
Journal Articles

Development of Zero-Spin Planetary Traction Drive Transmission: Part 2 — Performance Testing and Evaluation

Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 392–397.
https://doi.org/10.1115/1.1405131
Published Online: July 24, 2001
View Article titled, Development of Zero-Spin Planetary Traction Drive Transmission: Part 2 — Performance Testing and Evaluation
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Topics: Torque, Traction, Particle spin, Rotation, Spin (Aerodynamics), Lubricants, Lubrication, Temperature, Design, Mechanical efficiency
Journal Articles

Debris Effects on EHL Contact

Young S. Kang, Farshid Sadeghi, Professor, Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. October 2000, 122(4): 711–720.
https://doi.org/10.1115/1.1314606
Published Online: June 16, 2000
View Article titled, Debris Effects on EHL Contact
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Topics: Film thickness, Pressure, Stress
Journal Articles

Solving Elastic Contact Between Rough Surfaces as an Unconstrained Strain Energy Minimization by Using CGM and FFT Techniques

Xiaolan Ai, Krich Sawamiphakdi
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 1999, 121(4): 639–647.
https://doi.org/10.1115/1.2834117
Published Online: October 1, 1999
View Article titled, Solving Elastic Contact Between Rough Surfaces as an Unconstrained Strain Energy Minimization by Using CGM and FFT Techniques
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Topics: Energy conservation, Surface roughness, Contact mechanics, Errors, Stress, Equilibrium (Physics), Fourier transforms, Gradient methods, Traction
Journal Articles

An FFT-Based Transient Flash Temperature Model for General Three-Dimensional Rough Surface Contacts

Jianqun Gao, Si C. Lee, Xiaolan Ai, Harvey Nixon
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. July 2000, 122(3): 519–523.
https://doi.org/10.1115/1.555395
Published Online: September 21, 1999
View Article titled, An FFT-Based Transient Flash Temperature Model for General Three-Dimensional Rough Surface Contacts
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Topics: Heat, Surface roughness, Temperature, Transients (Dynamics), Simulation, Fast Fourier transforms, Friction
Journal Articles

A Mixed Elastohydrodynamic Lubrication Model With Asperity Contact

Xiaofei Jiang, D. Y. Hua, H. S. Cheng, Xiaolan Ai, Si C. Lee
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1999, 121(3): 481–491.
https://doi.org/10.1115/1.2834093
Published Online: July 1, 1999
View Article titled, A Mixed Elastohydrodynamic Lubrication Model With Asperity Contact
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Topics: Elastohydrodynamic lubrication, Surface roughness, Lubrication, Stress, Pressure, Bearings, Contact mechanics, Displacement, Gears, Inverse problems
Journal Articles

Effect of Three-Dimensional Random Surface Roughness on Fatigue Life of a Lubricated Contact

Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 1998, 120(2): 159–164.
https://doi.org/10.1115/1.2834403
Published Online: April 1, 1998
View Article titled, Effect of Three-Dimensional Random Surface Roughness on Fatigue Life of a Lubricated Contact
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Topics: Fatigue life, Surface roughness, Stress, Finishing, Computer simulation, Damage, Stress analysis (Engineering)
Journal Articles

Point Contact EHL Based on Optically Measured Three-Dimensional Rough Surfaces

Dong Zhu, Xiaolan Ai
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1997, 119(3): 375–384.
https://doi.org/10.1115/1.2833498
Published Online: July 1, 1997
View Article titled, Point Contact EHL Based on Optically Measured Three-Dimensional Rough Surfaces
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Topics: Surface roughness, Bearings, Cams, Computer software, Deformation, Elastohydrodynamic lubrication, Film thickness, Gears, Machining, Numerical analysis
Journal Articles

The Effects of Surface Texture on EHL Point Contacts

Xiaolan Ai, Herbert S. Cheng
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 1996, 118(1): 59–66.
https://doi.org/10.1115/1.2837093
Published Online: January 1, 1996
View Article titled, The Effects of Surface Texture on EHL Point Contacts
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Topics: Surface texture, Surface roughness, Pressure, Computer simulation, Film thickness, Flow (Dynamics), Fluctuations (Physics)
Journal Articles

Closure to “Discussions of ‘A Transient EHL Analysis for Line Contacts With Measured Surface Roughness Using Multigrid Technique’” (1994, ASME J. Tribol., 116, pp. 556–557)

Xiaolan Ai, Herbert S. Cheng
Journal: Journal of Tribology
Publisher: ASME
Article Type: Discussions
J. Tribol. July 1994, 116(3): 557–558.
https://doi.org/10.1115/1.2928882
Published Online: July 1, 1994
View Article titled, Closure to “Discussions of ‘A Transient EHL Analysis for Line Contacts With Measured Surface Roughness Using Multigrid Technique’” (1994, ASME J. Tribol., 116, pp. 556–557)
Open the PDF for Closure to “Discussions of ‘A Transient EHL Analysis for Line Contacts With Measured Surface Roughness Using Multigrid Technique’” (1994, ASME J. Tribol., 116, pp. 556–557) in another window
Topics: Surface roughness, Transients (Dynamics)
Journal Articles

A Transient EHL Analysis for Line Contacts With Measured Surface Roughness Using Multigrid Technique

Xiaolan Ai, Herbert S. Cheng
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1994, 116(3): 549–556.
https://doi.org/10.1115/1.2928879
Published Online: July 1, 1994
View Article titled, A Transient EHL Analysis for Line Contacts With Measured Surface Roughness Using Multigrid Technique
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Topics: Surface roughness, Transients (Dynamics), Pressure, Film thickness
Journal Articles

Numerical Simulation of Elastohydrodynamically Lubricated Contacts With Rough Surfaces

Alan Xiaolan Ai, Herbert S. Cheng
Journal: Applied Mechanics Reviews
Publisher: ASME
Article Type: Review Articles
Appl. Mech. Rev. June 1994, 47(6S): S221–S227.
https://doi.org/10.1115/1.3124411
Published Online: June 1, 1994
View Article titled, Numerical Simulation of Elastohydrodynamically Lubricated Contacts With Rough Surfaces
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Topics: Computer simulation, Surface roughness, Flow (Dynamics), Lubricants, Numerical analysis, Pressure, Transients (Dynamics)