Expert Details

Expert in Tribology, Wear, Coatings, Materials Selection, Materials Testing, Computer Modeling, Lubrication

Expert ID: 108175 Indiana, USA

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Expert has experience with numerous types of abrasive wear problems, including the design of optimal surface topography to minimize abrasive wear. This includes surface design, wear testing, and the use of coatings in abrasive wear environments to enhance system life and reduce failures. Expert has experience with the use of compliant wear resistant materials in design applications where abrasive wear is a dominant steady-state failure mechanism.

Expert has experience measuring and characterizing friction in ceramic, polymer, metal, solid lubricant, and composite systems, including systems modification to reduce the coefficient of friction. Expert also has experience calculating the heat generated in sliding friction as well as developing ways to dissipate it.

A significant portion of Expert's career has been focused on researching the use of elastomers in friction and wear applications. He has studied their use in systems where abrasive and erosive wear mechanisms are operational. Expert has designed and built custom devices for testing in these applications.


Expert is active in research in the area of coatings for advanced wear applications that include the use of diamond-like and superhard materials. Expert has designed state-of-the-art testing equipment for superhard coatings that includes vacuum environments. He has focused primarily on cutting tool applications, having studied cubic boron nitride based PVD coatings.

A key area of Expert's expertise is in the use of polymers for friction and wear applications. He has experience with high-temperature thermoplastic and thermoset matrices, as well as composites of carbon and glass fibers. In addition, Expert has considerable knowledge of selecting the proper polymer or metal for specific friction and wear application where cost, performance, or reliability are the chief concerns.

One of Expert's major research awards (from the National Science Foundation) involved fatigue wear, material transfer, and surface enhancement of polymers and polymeric composites.

Expert has primary level expertise in selecting and using polymers, ceramics, metals, and composites for design applications where friction and wear prevention are a major concern. He has knowledge of design aspects associated with boundary lubrication, mixed/EHL, and hydrodynamic lubrication applications.

Expert has experience in optimizing friction and wear performance for biomedical devices that incorporate moving mechanical assemblies where friction and wear are major concerns. The design issues of most importance to Expert include reliability, tissue/blood compatibility, and performance enhancement. One of his major research awards had been for the tribological investigation of plasma separation devices.

Expert has experience in the use and selection of solid and liquid lubricants in conjunction with sliding materials to achieve the desired values of friction. This involves the use of test equipment to fully characterize the sliding friction of a lubricant package over a wide range of operating conditions. The intent here was to devise a friction "package" with a high level of insensitivity to changes in external operating conditions.

Expert has experience in the design of sliding pairs to minimize the formation of adhesive junctions through proper anti-seize compound selection. He has used surface modification techniques and alternative material selection to reduce galling tendencies.


Expert has experience testing the friction properties of various lubricants as a function of temperature. This includes the assessment of the relative merit of a particular boundary lubricant additive or solid lubricant formulation as a function of temperature.



Expert has investigated the effects of solid lubricants on sliding friction both in atmospheric and vacuum conditions. In addition, he is familiar with many types of commercially-available solid lubricant formulations for high-temperature applications.


Expert has experience in developing advanced mechanical characterization methods for polymer and organic coatings and thin-films. This includes the use of state-of-the-art nano-indentation and scratch testing equipment as well as advanced finite element modeling of the indentation and scratching process. This work is especially suited to materials which exhibit non-linear material properties, in the visco-elastic/plastic regimes. Expert is also applying these methods to coatings during the curing phase, such as in paints and other protective finishes.

Array

Expert may consult nationally and internationally, and is also local to the following cities: Chicago, Illinois - Aurora, Illinois - Naperville, Illinois - Joliet, Illinois - Waukegan, Illinois - Fort Wayne, Indiana - South Bend, Indiana - Gary, Indiana - Grand Rapids, Michigan - Kenosha, Wisconsin

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Education

Year Degree Subject Institution
Year: 1989 Degree: Ph.D. Subject: Mechanical Engineering Institution: Northwestern University
Year: 1985 Degree: Masters Subject: Engineering Management Institution: Northwestern University
Year: 1981 Degree: B.S. Subject: Mechanical Engineering Institution: University of Illinois, Urbana

Work History

Years Employer Title Department Responsibilities
Years: 2000 to Present Employer: Undisclosed Title: Professor Department: Mechanical Engineering Responsibilities: Expert's teaching interests include machine design, tribology, reliability, and experimental engineering. His research interests include friction and wear, polymer materials characterization, thin-films, manufacturing, and machine design.
Years: 1995 to 2000 Employer: Penn State University Title: Associate Professor Department: Mechanical Engineering Responsibilities:
Years: 1989 to 1995 Employer: Penn State University Title: Assistant Professor Department: Mechanical Engineering Responsibilities:
Years: 1987 to 1989 Employer: Northwestern University Title: Research Assistant Department: Center for Engineering Tribology Responsibilities: He performed research in elastomeric materials for pump applications.
Years: 1986 to 1987 Employer: National Institute of Standards and Technology Title: Mechanical Engineer Department: Ceramics Division Responsibilities: Expert was a member of the Tribology Group. He performed research in the tribology of ceramics.
Years: 1985 to 1986 Employer: Northwestern University Title: Teaching Assistant Department: Mechanical Engineering Responsibilities: He was a teaching assistant for courses on mechanical vibrations, machine design, and experimental engineering.
Years: 1981 to 1985 Employer: Wells Manufacturing Co. Title: Plant Engineer Department: DuraBar Division Responsibilities: Expert performed design engineering, new equipment selection and installation, and new facilities design.

Government Experience

Years Agency Role Description
Years: 1985 to 1986 Agency: NIST Role: Mechanical Engineer Description: Expert was a member of the Tribology Group. He performed research in the tribology of ceramics.

Career Accomplishments

Associations / Societies
Expert is a member of ASME, STLE, and MRS.
Professional Appointments
He was Associate Editor of ASME Trans. Journal of Tribology (1997-2003).
Awards / Recognition
Expert received the ASME Burt Newkirk Award and the SAE Ralph Teetor Award.
Publications and Patents Summary
He has authored over 75 publications and one patent.

Additional Experience

Expert Witness Experience
Expert has served as an expert witness in several depositions in the consumer product and biomedical components areas.
Training / Seminars
Expert has developed training courses in topics related to mechanical design, and friction, lubrication, and wear. A professor at Notre Dame, he often gives educational short courses in the following areas: friction, wear, and lubrication for managers/non-technical individuals, advanced topics in friction, wear, and lubrication for scientists and engineers, and special topics in friction, wear, and lubrication. He can tailor these courses to a particular industry's needs. Some of the topics discussed are: introduction to tribology, regimes of lubrication, and variables in tribology, friction, and wear.
Vendor Selection
Expert has experience locating vendors of lubricants (liquid and solid), wear-resistant coatings and materials, friction and wear test equipment, mechanical design components, plastics, elastomers, and composites.

Fields of Expertise

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