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 Expert  715851

Expert in Friction and Wear Reduction, Biomechanics

Available for your Consulting and Expert Witness Needs

New Hampshire (NH)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
Expert is a specialist in tribology. His primary expertise is in friction and its consequences during dry sliding of mechanical components. Specific topics of his activity include the measurement of friction coefficients during dry sliding of polymers and ceramics against metals, the measurement and prediction of sliding surface temperatures resulting from frictional heating, the analysis of stresses around sliding contacts (contact mechanics), the wear of polymers and polymer-based composites, the wear of ceramic coatings, and the friction of ice and snow.

Expert has studied these phenomena in a variety of applications. The applications include mechanical face seals, gas path seals, dry sleeve bearings, snow skis, and computer disk-head interactions. He has investigated the wear and failure of orthopaedic joint prostheses, including hip and knee prostheses. He has used finite element methods in much of his work and has developed finite element programs to analyze surface temperatures and contact stresses. He has designed and constructed a variety of mechanical test devices and has been actively teaching mechanical design courses.


dry friction




friction measurement




friction testing

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Boston, Massachusetts;  Worcester, Massachusetts;  Lowell, Massachusetts;  Cambridge, Massachusetts;  Newton, Massachusetts;  Lawrence, Massachusetts;  Waltham, Massachusetts;  Manchester, New Hampshire;  Nashua, New Hampshire;  and Portland, Maine.

Often requested
with this expert:

Tribology, Wear, Coatings, Materials Selection, Materials...
Friction, Tribology, and Wear
Mechanical Engineering, Tribology, Rheology
Friction, Lubrication, and Machining

Year   Degree   Subject   Institution  
1973   Ph.D.   Mechanics   Rensselaer Polytechnic Institute  
1965   M.S.   Mechanical Engineering   Stanford University  
1963   B.S.   Mechanical Engineering   Worcester Polytechnic Institute  

Work History:
Years   Employer   Department   Title  

1974 to




Thayer School of Engineering


Professor of Engineering


Career Accomplishments:

Expert is a member of ASM, ASEE, SAE, Sigma Xi, and Tau Beta Pi.


He is a registered Professional Engineer in New Hampshire.

Professional Appointments

Expert is the former Technical Editor of the ASME Journal of Tribology. He was Chairman of the 1992 Gordon Conference on Tribology and Chairman of the 1990 ASME/STLE Tribology Conference.


Expert is a Fellow of STLE and ASME. He has received the 1976 ASME Newkirk Tribology Award, the 1976 SAE Ralph Teetor Engineering Educator Award, the 1988 STLE Presidential Council Research Grant Award, the 1993 STLE Sonntag Best Paper Award, and the 1995 ASME Dedicated Service Award.

Publications and Patents Summary

He has authored or co-authored many technical publications, edited or co-edited four books, and given many technical seminars and presentations.

Selected Publications and Publishers  
 - R.G. Lerner, ed. Encyclopedia of Physics  
 - Friction Lubrication and Wear Technology (Metals Handbook). ASM International  
 - CRC Handbook of Modern Tribology, CRC Press  
 - CRC Handbook of Mechanical Engineering  
 - Journal of Tribology, ASME  

Government Experience:
Years   Agency   Role   Description
1965 to 1967   U.S. Army   Lieutenant   Expert served as an officer in the U.S. Army Signal Corps in Southeast Asia.

Consulting Services:
Recent Client Requests:
  • Expert in surface fatigue for consulting on Surface wear in load-bearing roller application.
  • Manufacturing expert for injection molding phenolic materials.
  • Expert in material selection needed for consulting regarding a wear plate ss traveling belt.
  • Expert in Ball Joint Clamp for consulting on new products and feasibility.
  • Expert in production processing equipment wear.
  • Expert in static friction for consulting on Effect of Humidity on Coefficient of Friction of Nylon components.
  • Expert in providing an independent failure analysis & root cause for a bearing failure.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Tribology expert for consulting on Litigation against BMW North America.
  • Expert in tribology, for consulting on slip and fall on tile that was laminated and had water.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
1992 to 1993   Thailand   Expert was a Fulbright Distinguished Lecturer at the Asian Institute of Technology.
2001 to 2001   Japan   He was a Visiting Research Scholar at the AIST Mechanical Engineering Laboratory in Tsukuba, Japan.
1982 to 1982   France   Expert was a Visiting Research Professor at Institut National des Sciences Appliquées in Lyon, France.

Language Skills:
Foreign Language   Description
French   Expert can speak and read French.
Thai   He can speak Thai.


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