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This is the first episode in a two-part series exploring the fundamental principles of friction, tailored for lubrication engineers and tribologists. In "Friction Unveiled," we delve into the essential question: What is friction and why is its understanding so critical in our field? We will differentiate between static and dynamic friction, illustrating their distinct behaviors and implications. The episode will highlight practical examples where managing friction is paramount, examining scenarios where low friction is desired—such as enhancing the efficiency of race cars, extending the range of electric vehicles, optimizing turbofan performance, and improving the general operation of most machinery. Conversely, we will explore applications where high friction is essential for safety and function, including the critical roles of brakes and tires, with a specific example of wet brakes in cranes. Finally, we will introduce the key methods for controlling friction, providing an overview of lubrication regimes, the significance of viscosity, the role of lubricant additives, and the impact of surface coatings, concluding with some final thoughts on the pervasive influence of friction in engineering.

For more information, visit Vern's presentation on friction and traction.

For a brief video demonstration of our conversation, check out our YouTube Short.

Join us for Part II on July 28, 2025!

Our Panelists:

Vern Wedeven, President of Wedeven Associates, Inc. (WAI), is a leading expert in tribology research and development, with a career spanning over three decades. Since 1987, he and his team at WAI have pioneered specialized tribology test machines and methods, culminating in the innovative Tribology-by-Design (T/D) approach—a comprehensive system integrating theory, tools, methodology, and strategy to solve complex tribological challenges. Dr. Wedeven's significant contributions include advancements in space propulsion systems, such as the Space Shuttle Main Engine turbopumps, and aeropropulsion, with work on jet engine oils, bearings, and gear materials. An alumnus of Calvin University, the University of Michigan, and Imperial College, London, his extensive experience includes tenures at NASA Glenn Research Center, NASA Headquarters, and SKF-America. He has authored over sixty technical papers, contributed to three books, and holds three patents. A Fellow of STLE, Dr. Wedeven has been recognized with numerous accolades, including the Walter D. Hodson Award, the Captain Alfred E. Hunt Award, the Arch T. Colwell Cooperative Engineering Medal, and the STLE International Award.

Marc Ingram has over 10 years experience working in Tribology. His masters degree in Chemistry and PhD in Engineering (Tribology) helps him easily bridge the gap that so often exists between lubricant formulator and field/test engineer. He has worked with all major oil and additive companies after a successful career at Imperial College, PCS Instruments and Afton Chemical. Marc has extensive knowledge of all tribology test methods including both standardized and non-standa

For more information on STLE, please visit https://www.stle.org/ If you have an idea for our podcast, or interested in being a guest, please Email STLE Director of Professional Development Robert Morowczynski at rmorowczynski@stle.org . Also, we love your feedback, please take a minute to provide us with your thoughts at Perfecting Motion Podcast Feedback.

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In this episode of Perfecting Motion, we spotlight a true Titan of Tribology—Gary Wood, the northeast district sales manager at HF Sinclair and longtime CLS-certified member since 1986. Hosted by STLE President Kevin Delaney of Vanderbilt Chemicals, LLC, this conversation dives deep into Gary’s distinguished career, leadership within the CLS committee, and decades of contributions to the field of tribology. Listeners will also gain insight into the mentors who shaped Gary’s journey, his greatest professional accomplishments, and the evolving challenges he has faced in the lubrication and tribology sectors. He also shares his forward-looking perspective on the future of the field and offers valuable advice for newcomers. This episode is a must-listen for aspiring tribologists and seasoned professionals alike, highlighting the impactful role of STLE in shaping careers and advancing the science of tribology.

Our Titan of Tribology:

Gary Wood, District Manager at Petro-Canada Lubricants / HF Sinclair, I manage the sales and distribution of Petro-Canada Lubricants in the Northeast region, working with a network of distributors and customers to deliver high-quality products and services. I have been in this role since Aug 2022, and I bring over 30 years of experience and expertise in the lubrication industry, as well as a certification as a Lubrication Specialist from the Society of Tribologists and Lubrication Engineers (STLE).

Our Host:

Kevin Delaney, global sales director for the Petroleum Group at Vanderbilt Chemicals, LLC, in Norwalk, Conn., and STLE’s current 2025-2026 president. Delaney graduated with a bachelor of science degree in chemistry from Penn State University in 1979. He has worked in the lubricants industry for more than 40 years. The first 20 years of his career were spent in the laboratory synthesizing additives, formulating packages, developing metalworking fluids and providing technical service for polyalkylene glycols and biocides. Since then, he’s worked in technical sales and sales management with extensive experience in Asia Pacific. Delaney has been an STLE member since 1983. He held every office in the previous STLE Connecticut Section at least once and organized several of their education days. He was on the STLE Board of Directors from 2005 to 2009. He also was vice chair of the Metalworking Technical Committee in 2000.

For more information on STLE, please visit https://www.stle.org/ If you have an idea for our podcast, or interested in being a guest, please Email STLE Director of Professional Development Robert Morowczynski at rmorowczynski@stle.org . Also, we love your feedback, please take a minute to provide us with your thoughts at Perfecting Motion Podcast Feedback.

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This month's episode focuses on using friction to help us. Yes, that's right, embracing the friction that tribologists try to combat. The focus is of tactile aids that solely rely on physical bumps, lines, and textures are limited in the amount and density of information they can convey due to "tactile clutter" within a small physical space. The lab has found that different surface chemistries alone can create distinct sensations without adding larger scale roughness, and Maryanne's work identifies frictional instabilities as a framework for predicting how different surfaces will feel from each other. This type of analysis and connection between material structure and dynamic friction can help predict how to engineer more advanced materials to expand the types of sensations people can feel, and design more types of tactile aids, such as sensors or medical diagnostics with inherently switchable materials.

Our Guests:

Maryanne Derkaloustian is a third year PhD candidate at the Department of Materials Science and Engineering at the University of Delaware. She received her BS in Materials Science and Engineering at the University of Illinois at Urbana-Champaign. Her current research in the Dhong Lab focuses on connecting surface structure and chemistry to frictional phenomena at the length scale of human touch to understand how humans tell surfaces apart and engineer next generation tactile aids. She was the recipient of a 2024 STLE Scholarship Award from the Philadelphia section.

Prof. Charles Dhong is an assistant professor at the University of Delaware in the Department of Materials Science and Engineering, and holds a joint appointment in the Department of Biomedical Engineering. He received his BS in Chemical and Biomolecular Engineering at the University of California, Berkeley, and a Ph.D. in the same at Johns Hopkins University. He then held a postdoc at the University of California, San Diego with Prof. Darren Lipomi in the Department of Nanoengineering. His research is currently funded through multiple grants through the National Institutes of Health, including as PI and coPI of NIH R01s. His students have received awards and recognition in several professional societies, including three students who have received the STLE Scholarship Award.

For more information on textures and friction, check out our past TLT article on "Measuring the Brain's Response to Braille Friction".

For more information on STLE, please visit https://www.stle.org/ If you have an idea for our podcast, or interested in being a guest, please Email STLE Director of Professional Development Robert Morowczynski at rmorowczynski@stle.org . Also, we love your feedback, please take a minute to provide us with your thoughts at Perfecting Motion Podcast Feedback.