Expert Details
Tribology, Wear, Coatings, Materials Selection, Materials Testing, Computer Modeling, Lubrication
ID: 108175
Indiana, USA
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.
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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 |
|---|---|---|---|
| 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. |
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| Years | Employer | Title | Department |
| Years: 1995 to 2000 | Employer: Penn State University | Title: Associate Professor | Department: Mechanical Engineering |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1989 to 1995 | Employer: Penn State University | Title: Assistant Professor | Department: Mechanical Engineering |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| 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. |
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| Years | Employer | Title | Department |
| 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. |
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| Years | Employer | Title | Department |
| 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. |
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| Years | Employer | Title | Department |
| 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. |
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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 |
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| 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 |
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| 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
abrasion, abrasion testing, abrasive coating material, abrasive wear, finite element modeling, coefficient of friction, coefficient of rolling friction, dry friction, friction, sliding friction, elastomer friction, friction measurement, diamond-like carbon coating material, superhard coating material, material wear, metal abrasion, metal abrasive wear, polymer wear, wear effect, surface-fatigue wear, wear-resistant coating material, wear testing, tribology, wear prevention, wear resistance, biomedical device design review, friction-control lubrication, galling, lubricant testing, solid lubricant, polymer coating material, organic coating material, friction testing, tool wear, bearing lubricant, lubricant coating material, stainless steel wear, elastomer modulus of elasticity, medical lubricant, superhard material, scuffing, diamond-like carbon, abrasion resistance, seal wear, bearing lubrication, elastomer mechanical property, elastomer selection, molybdenum disulfide, elastomer fatigue, slippery coating material, cubic boron nitride, static friction, rubber hardness, rubber friction, elastomer property, fatigue crack growth, thin-film mechanical property, seal (device), biocompatibility, wear-debris analysis, wear-control lubrication, attrition, abrasion-resistant coating material, thin-film coating process, traction (friction), stiction, wear-control lubricant, biomedical device, bearing, adhesive wear, rubber abrasive wear, polymer abrasive wear