Modeling Ice Friction

Glaciers and Ice Friction

Glaciers are comprised of snow accumulated over many years and compressed into...Read More »


Analyzing the evolution of adhesive wear

Adhesive Wear Analyzed

The effects of surface wear reaches across many industries including production, manufacturing, engineering, transportation, roads, and machinery, to name only a few. Given its wide reaching tentacles, it can be surprising to realize that surface wear is still not completely understood.

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Sticky or Not Sticky?

Numerical analysis of adhesion of rough surfaces shows that there exist one unique parameter determining whether the surface is sticky or not.

Abstract

Some open problems in adhesion (of rough surfaces)

By M.Ciavarella, A. Papangelo. Politecnico di BARI, Italy.

Adhesion for ‘‘soft’’ bodies shows instabilities like in the...Read More »


Contact Pressure For Rough Surfaces: A Tutorial

In this article, a calculation of contact pressure in a rough contact is discussed. The calculation is done using a Tribology Simulator software, which is available for download here (its free to use). The simulator uses a Boundary Element Method (BEM) with Fast Fourier Transform...Read More »


Contact mechanics challenge results

The Contact-Mechanics Challenge completed

In late 2015 we posed the Contact-Mechanics Challenge. This has now been completed and the winner...Read More »


Zeroing in on ZDDP tribofilm growth

Models for the stress-activated growth of tribofilms from ZDDP were modified to include wear.

TWO RECENT CUTTING EDGE ARTICLES reported on work that showed the growth rates of tribofilms from ZDDP were accelerated by contact stress1 or interfacial shear2 under conditions in which the temperature rise caused by rubbing was negligible....Read More »


Elmer: An Open Source Finite Elements Software

There are nowadays some Open Source Finite Elements packages available online, just to cite some: CalculixSalome-Meca (with Code Aster)Z88 AuroraElmer, etc.

Engineering surfaces are heterogeneous and can be slippery or sticky locally depending on surface roughness and chemistry. The variation...Read More »


Adhesive Wear Particles Generation: by Fracture or Atom-by-Atom?

The most famous equation to predict wear known probably to everyone working in the field of tribology  is Read More »


Ab Initio Analysis of Carbon Film Lubricity

Carbon-based nanomaterials, coatings and films attracted a great attention due to proved possibility to achieve lowest friction and wear...Read More »


Hysteresis in Friction of Graphene

Friction is a result of complex interaction of physical, chemical and mechanical forces at the sliding interface. Due to...Read More »


Molecular Dynamic Simulations and AFM Experiments at Overlapping Speeds

Atomic Force Microscopy (AFM) is a powerful and convenient experimental measurement device in the field of nano-scale...Read More »


MD_Simulation_Tribofilm

Molecular Dynamic Simulations of Zinc Phosphate - Iron Oxide Reaction

In order to improve wear resistance of the surfaces operating in harsh conditions, along with base oils additives are...Read More »


Mechano-chemical wear and tribofilm thickness simulation

When the conditions in the tribosystem are such that the lubricant is not capable of carrying any significant part...Read More »


Inverse Friction Force - Load Dependence of Graphene

When the bodies slide against each other, the classic Amonton’s law states that the friction force is directly proportional...Read More »


Anyone is up for challenge?

Society of tribology and lubrication engineers announced Contact Mechanics Challenge.   Dr. Martin Müser initiated a competition in calculation of a real contact area. He has already results of his own calculation and challenges other groups to join and compare the results. As an outcome, there will be a paper discussing...Read More »