Accurate and efficient contact models for wheel–rail interaction are essential for the study of
the dynamic behaviour of a railway vehicle. Assessment of the contact forces and moments …

Although “film thickness” and “viscosity” represent two of the most important physical
parameters in lubricated tribological contacts, their in situ measurement in tribosystems is …

The authors have recently assessed the feasibility of applying an ultrasonic technique for
investigating contact problems between the wheel and rail. In particular, the size and shape …

The contact area and pressure distribution in a wheel/rail contact is essential information
required in any fatigue or wear calculations to determine design life, re-grinding, and …

This paper describes how to improve the prediction method of the adhesion coefficient by
means of the experimentally estimated boundary friction coefficient obtained by two kinds of …

In the oil and gas industry, hydraulic fracturing (HF) is a common application to create
additional permeability in unconventional reservoirs. Using proppant in HF requires …

The use of ultrasonic reflection is emerging as a technique for studying tribological contacts.
Ultrasonic waves can be transmitted non-destructively through machine components and …

This paper presents a laboratory study on the Acoustic Emission (AE) generated during
railway wheel–rail track interaction, with a view to developing methods of in situ rail–wheel …

Obtaining insights into friction at the nanoscopic level and being able to translate these into
macroscopic friction behavior in real-world systems is of paramount importance in many …

The contact between the fingertip and an object is formed by a collection of micro-scale
junctions, which collectively constitute the real contact area. This real area of contact is only …