Leonardo da Vinci as a Tribologist

Tribology is the science dealing with interactive surfaces in relative motion and includes the study of friction, wear, and lubrication and how these properties affect design. The term tribology was coined in 1966 by Peter Jost, the man considered the founder of tribology. Leonardo da Vinci...Read More »


Tribology and Electric Vehicles

Electric Vehicles Through the Years

Electric vehicles, while often considered a new phenomenon, have existed...Read More »


Tracking a Sudden Fail of Microelectormechanical Systems

What time does it take before the minute parts of microscopic equipment become unusable as a result of deterioration? What warning signals do you need to watch out for that will show that the components will soon fail to function as required? In a bid to provide swift...Read More »


Tribometer managing autumn leaf problem on railways worldwide

Since the 1800s, railway organizations have been struggling with low adhesion on the rail, especially during the Autumn season also known as the “slippery track season”. In Autumn, leaves fall on the rails and when train wheels crush the leaves, they become a layer of oil...Read More »


How can tribology help extend critical machinery service life?

Tribology is the science of interacting surfaces in relative motion. Basically, it studies friction, wear and lubrication – three phenomena linked to surface degradation and, thus, to machine reliability and performance. When machines wear out, they perform worse, are less productive and, finally, begin...Read More »


Guidance Notes on Friction

In dry sliding between a given pair of materials under steady conditions, the coefficient of friction may be almost constant. This is the basis for two EMPIRICAL Laws of Sliding Friction, which are often known as Amontons’ Laws and date from 1699. They are in fact not...Read More »


Contact Mechanics Book

The Handbook on Contact Mechanics (Handbuch der Kontaktmechanik) co-authored by Honorary Professor of Tomsk Polytechnic University, head of the Department of System Dynamics and Friction Physics at Technical University Berlin, Valentin Popov, a TPU alumnus Emanuel Willert, and Assistant Professor of the Department of System Dynamics and...Read More »


On the history of elastohydrodynamics

Here we present an abstract to a paper devoted to the history of eastohydrodynamic theory and his founder – Alexander Mohrenstein-Ertel. This paper discusses in detailes the peculiar biography of the scientist and the early years of the theory development.

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Note on the history of contact mechanics and friction

No future without history! A great article on the history of great discoveries in the field of contact mechanics and friction was recently published by Elena Popova and Valentin L. Popov. Here we present the abstract of the article.

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The correct lubricant: a practical guide to choose lubricating oil

‘The correct lubricant’ covers basic practical information about lubricants in automotive and industrial areas. It is written for users of lubricants, giving only what is essential to know and useful for them. It could also be used by professionals in the field who must explain various aspects of...Read More »


Impact of water on Grease film thickness in rolling point contacts

In a rolling bearing, the load transmission is often accompanied by high contact stresses which may eventually lead to wear and/or fatigue. In order to ensure separation of moving parts leading to a long life, bearings are usually grease or oil lubricated. The separation of the moving parts in a...Read More »


After the Mystery of Rotary Lip Seals

Lip seals compete with mechanical face seals in sealing oil or grease in rotary shaft applications. Under certain running conditions both kinds of seals can be used however, the latter ones are generally used for applications where a significant pressure difference needs to be preserved. Rotary lip seals are preferred...Read More »


Friction is a possible reason for SpaceX Falcon 9 explosion

September 1 of 2016 at Cape Canaveral SpaceX lost is Falcon 9 rocket on a launch pad due to dramatic explosion. During a routine preflight fueling test, the  rocket and the $200 million Israeli Earth communication satellite Amos-6 were lost. No one was injured.

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What contributes to thicker grease films ?

A rolling bearing preferably runs under EHL conditions. The film thickness between the rolling elements and the rings is...Read More »


Argonne Embraces Concept of "in operando" Formation of Carbon-based Tribofilms

Earlier this month, tribologists and physicists at...Read More »


Contact Area vs. Load: Simple Scaling Laws

“God made the bulk; surfaces were invented by the devil”, a Nobel prize winning physicist...Read More »


Small Particles - Big Problems

Tiny particles are all over around us and sometimes they may create problems. This is especially of concern with...Read More »


Determining Fatigue Wear Using Wear Particle Analysis Tools