Photo of Liming Chang

Liming Chang

Professor Emeritus

Affiliation(s):

  • Mechanical Engineering

322 Leonhard Building

lxc20@psu.edu

814-865-6852

Research Areas:

Mechanical Sciences

Interest Areas:

Tribology, lubricants/lubrication, modeling of contact/lubrication problems.

 
 

 

Education

  • BS, Mechanical Engineering, Drexel University, 1983
  • MS, Mechanical Engineering, University of Illinois at Urbana-Champaign, 1984
  • Ph D, Mechanical Engineering, University of Illinois at Urbana-Champaign, 1988

Publications

Journal Articles

  • Liming Chang, Qingtao Yu and Yeau-Ren Jeng, 2018, "Modeling and Analysis of High-Load and High-Speed Involute Spur Gear Systems in Adverse Lubrication", Tribology Transactions
  • Liming Chang and Yeau-Ren Jeng, 2018, "A Model for Surface-Film Lubricated Cold Rolling Incorporating Interdependence of Mechanics, Heat Transfer and Surface-Film Lubrication", 141
  • Liming Chang, Yeau-Ren Jeng and Qingtao Yu, 2017, "Analysis of Thermal Stability of High-Performance Rolling/Sliding Contacts in Mixed Lubrication", Tribology Transactions
  • Liming Chang, Y.R. Jeng and Q. Yu, 2016, "Parametric analysis of rolling/sliding line contacts under boundary and near boundary lubrication conditions", Tribology Transactions
  • Liming Chang, Y.R. Jeng and Q. Yu, 2016, "A unified mixed-lubrication model of rolling/sliding line contacts from elastohydrodynamic lubrication to boundary lubrication", Proc. IMechE Part J: Journal of Engineering Tribology
  • Q. Yu, Liming Chang and Y. R. Jeng, 2015, "A mathematical model for rolling/sliding line contacts in boundary and near boundary lubrication", Proc. IMechE Part J: Journal of Engineering Tribology
  • Liming Chang and Y. R. Jeng, 2014, "A mathematical model for the mixed lubrication of non-conformable contacts with asperity friction, plastic deformation, flash temperature and tribo-chemistry", ASME Journal of Tribology, 136, pp. 022301
  • Liming Chang and Y. R. Jeng, 2014, "Parametric analyses of the mixed-lubrication performance of rolling/sliding contacts in high-load and high-speed conditions", Tribology Transactions, 57, pp. 879-889
  • Liming Chang and Y. Yan, 2013, "A theory of the hydrodynamic film thickness in centrally pivoted oil-lubricated plane-pad thrust bearings", Tribology Transactions, 56, pp. 149-160
  • Liming Chang and Y. R. Jeng, 2013, "Effects of negative skewness of surface roughness on the contact and lubrication of nominally flat metallic surfaces", IMech, Part J: Journal of Engineering Tribology, 227, pp. 559-569
  • Liming Chang, Y. R. Jeng and P. Y. Huang, 2013, "Modeling and analysis of the meshing losses of involute spur gears in high-speed and high-load conditions", ASME Journal of Tribology, 135, (1)
  • Liming Chang and H. Zhang, 2012, "Modeling and parametric study of fatty-acids boundary lubrication in nominally flat contacts of metallic surfaces", STLE Tribology Transactions, 55, pp. 376-386
  • R. A. Naffin and Liming Chang, 2010, "An analytical model for the basic design calculations of journal bearings", ASME Journal of Tribology, 132, pp. 024503
  • Liming Chang and H. Zhang, 2010, "On the state and severity of frictional sliding contacts between nominally flat metallic surfaces", IMech Journal of Engineering Tribology, 224, pp. 427-438
  • Liming Chang, 2010, "A baseline theory for the design of oil-lubricated centrally pivoted plane-pad thrust bearings", ASME Journal of Tribology, 132, pp. 041703
  • Liming Chang, 2009, "Effects of thermal induced inhomogeneous shear and surface thermal boundary conditions on the shear stress in sliding elastohydrodynamic contacts", Lubrication Science, 21, pp. 227-240
  • Liming Chang, 2009, "Determination of the sampling interval in the surface roughness measurements with implications to engineering tribo-surface characterization and evaluation", IMech Journal of Engineering Tribology, 223, pp. 675-681
  • H. Zhang and Liming Chang, 2008, "An asperity-based mathematical model for the boundary lubrication of nominally flat metallic contacts", Lubrication Science, 20, pp. 1-19
  • Liming Chang, 2008, "Modeling of asperity collisions and their effects in a frictionless sliding contact of nominally flat metallic surfaces", ASME Journal of Tribology, 130, pp. 031403
  • Liming Chang, 2007, "On the CMP material removal at the molecular scale", ASME Journal of Tribology, 129, pp. 436-437
  • Liming Chang and H. Zhang, 2007, "A mathematical model for frictional elastic-plastic sphere-on-flat contacts at sliding incipient", ASME Journal of Applied Mechanics, 74, pp. 100-106
  • S. Qu, Liming Chang, M. N. Webster and A. Jackson, 2006, "On the mechanisms of the reduction in EHL traction at low temperature", Tribology Transactions, 49, pp. 182-191
  • Liming Chang, 2006, "A parametric analysis of the thermal shear localization in elastohydrodynamic lubrication films", ASME Journal of Tribology, 128, pp. 79-84
  • Liming Chang, H. Zhang and J. Lococo, 2006, "Effects of boundary films on the frictional behavior of rough-surface contacts in incipient sliding", IMeche Engineering Tribology, 220, pp. 385-394
  • M. N. Webster, G. H. Lee and Liming Chang, 2006, "Effect of EHL conditions on the behavior of traction fluids", Tribology Transactions, 49, pp. 439-448
  • Liming Chang, 2006, "Platform for modeling the boundary lubrication of nominally flat metallic contacts", ASME Journal of Tribology, 128, pp. 677-680
  • Liming Chang, 2005, "On the shear bands and shear localizations in elastohydrodynamic lubrication films", ASME Journal of Tribology, 127, (1), pp. 245-247
  • Liming Chang and H. Zhang, 2005, "On the two points of views of plastically deformed asperity contacts with friction loading", IMechE J. Engineering Tribology, 219, (13), pp. 201-208
  • H. Zhang, Liming Chang, M. N. Webster and A. Jackson, 2003, "Effects of friction on the contact and deformation behavior in sliding asperity contacts", Tribology Transactions, 46, (4), pp. 514-521
  • H. Zhang, Liming Chang, M. N. Webster and A. Jackson, 2003, "A micro-contact model for boundary lubrication with lubricant/surface physio-chemistry", ASME Journal of Tribology, 125, (1), pp. 8-15
  • Y. Zhao, Liming Chang and S. Kim, 2003, "A mathematical model for chemical-mechanical polishing based on formation and removal of weakly bonded molecular species", Wear, pp. 332-339
  • Y. Zhao and Liming Chang, 2002, "A micro-contact and wear model for chemical-mechanical polishing of silicon wafers", Wear, 252, pp. 220-226
  • Y. Zhao and Liming Chang, 2001, "A model of asperity interactions in elastic-plastic contact of rough surfaces", Journal of Tribology, 123, (4), pp. 857-864
  • X. Zhai and Liming Chang, 2001, "Some insights into asperity temperatures in mixed-film lubrication", Tribology International, 34, (6), pp. 381-387
  • N. Fang, Liming Chang, G. Johnston, M. Webster and A. Jackson, 2001, "An experimental/theoretical approach to modelling the viscous behaviour of liquid lubricants in elastohydrodynamic lubrication contacts", Proc. Instn. Mech. Engrs. Part J, 215, pp. 311-318
  • Liming Chang, Y. Zhao, P. Hall, R. Thom and C. Moore, 2001, "On heat generation in rolling contacts under boundary and mixed lubrication", Journal of Tribology, 123, (1), pp. 61-66
  • N. Fang, Liming Chang, A. Jackson and M. Webster, 2000, "A non-averaging method of determining the rheological properties of traction fluids", Tribology International, 33, (11), pp. 751-760
  • Liming Chang, 2000, "A simple and accurate method to calculate transient EHL film thickness in machine components undergoing operation cycles", Tribology Transactions, 43, (1), pp. 116-122
  • Liming Chang and Y. Zhao, 2000, "On the sensitivity of the asperity pressures and temperatures to the fluid pressure distribution in mixed-film lubrication", Journal of Tribology, 122, (1), pp. 77-85
  • Y. Zhao, D. Maietta and Liming Chang, 2000, "An asperity microcontact model incorporating the transition from elastic deformation to fully plastic flow", Journal of Tribology, 122, (1), pp. 86-93
  • X. Zhai and Liming Chang, 2000, "A transient thermal model for mixed-film contacts", Tribology Transactions, 43, (3), pp. 427-434
  • Liming Chang and Yeau-Ren Jeng, , "On the Feasibility of Surface-Film Lubricated Cold Rolling without Liquid-Phase Cooling", Journal of Tribology

Conference Proceedings

  • N. Fang, Liming Chang, G. Johnston, M. Webster and A. Jackson, 2000, "An experimental/theoretical approach to modeling the viscous behavior of liquid lubricants under EHL conditions", 27th Leeds-Lyon Symposium on Tribology

Manuscripts

  • Liming Chang and Y. R. Jeng, 2013, "A mathematical model for the mixed lubrication of non-conformable contacts with asperity friction, plastic deformation, flash temperature and tribo-chemistry", ASME Journal of Tribology

Research Projects

Honors and Awards

  • Captain Alfred E. Hunt Memorial Award, STLE, March 2016
  • NSF Career Award, 1995

Service

Service to Penn State:

Service to External Organizations:

 


 

About

With more than 60 faculty members, 330 graduate students, and 1,000 undergraduate students, the Penn State Department of Mechanical Engineering embraces a culture that welcomes individuals with a diversity of backgrounds and expertise. Our faculty and students are innovating today what will impact tomorrow’s solutions to meeting our energy needs, homeland security, biomedical devices, and transportation systems. We offer B.S. degrees in mechanical engineering as well as resident (M.S., Ph.D.) and online (M.S.) graduate degrees in mechanical engineering. See how we’re inspiring change and impacting tomorrow at me.psu.edu.

Department of Mechanical Engineering

137 Reber Building

The Pennsylvania State University

University Park, PA 16802-4400

Phone: 814-865-2519