Knowledge

Welcome to our knowledge centre. Here you can find a selection of resources and articles on our products and industries we are involved with.

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STLE Conference Review

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Spotlight Paper

The Development of a Small-Scale Wear Test for CoCrMo Specimens with Human Synovial Fluid

Some original and hugely important bio tribology research using the HFR rig to study both friction and wear of hip …

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Some original and hugely important bio tribology research using the HFR rig to study both friction and wear of hip implant materials in the presence of synovial fluid. The importance of proteins in determining wear of CoCrMo (Cobalt Chromium Molybdenum) couples is clearly shown with excellent repeatability.
Open Access Link:
https://www.sciencedirect.com/science/article/pii/S2352573817300677?via%3Dihub

PCS review

Spotlight Paper

The Origins of White Etching Cracks and Their Significance to Rolling Bearing Failures

White etch cracking is an increasingly common failure mode associated with wind turbine bearings and gears. Although a myriad of …

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White etch cracking is an increasingly common failure mode associated with wind turbine bearings and gears. Although a myriad of factors can cause in service failure modes and it is clear that a single parameter can be attributed to such complex defects, experimental data from the MPR points to the specific stress history of the contact being of paramount importance.

Open Access Link:
https://www.sciencedirect.com/science/article/pii/S0142112318304328?via%3Dihub

PCS review

Spotlight Paper

Measurement of EHD Friction at Very High Contact Pressures

A very detailed paper on a hugely important subject, tribofilm formation and activation. The term “mechanochemsity” ( the concept of …

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A very detailed paper on a hugely important subject, tribofilm formation and activation. The term “mechanochemsity” ( the concept of using mechanical force to initiate chemical reactions ) aptly describes this research area, which intriguingly concludes that the shear stress experienced by lubricants primarily controls the rate of additive film formation. The paper presents clear MTM mapper experimental data which is then used to discuss, in depth why and when lubricant additive films form.
Open Access Link:
https://link.springer.com/article/10.1007/s11249-020-1281-5

PCS review

Spotlight Paper

The Influence of Bearing Grease Composition on Friction in Rolling/Sliding Concentrated Contacts

Some outstanding grease research carried out by a team of great experimentalists using both the MTM and EHD rigs. The …

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Some outstanding grease research carried out by a team of great experimentalists using both the MTM and EHD rigs. The novel methodology employed showed how it is possible to disentangle the behaviour of the grease thickener from that of the base oil, which is then used to explain the characteristic “bump” observed in some grease Stribeck curves. The illuminating research concludes that greases exhibit two distinct operating regions, in terms of friction and film thickness. A must read for anyone involved in this sometimes challenging area of tribology research.

Open Access Link:
https://www.sciencedirect.com/science/article/pii/S0301679X15004612

PCS review

Spotlight Paper

Prediction of Micropitting Damage in Gear Teeth Contacts Considering the Concurrent Effects of Surface Fatigue and Mild Wear

Although sometimes presented as a seemingly random and somewhat unpredictable sequence of events, this paper shows a high level of …

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Although sometimes presented as a seemingly random and somewhat unpredictable sequence of events, this paper shows a high level of details and understanding of the mechanisms involved. A detailed introduction to micropitting is leads on to discussion and presentation of an excellent modelling technique. Predictions made by the model are compared to actual micropitting results, and pleasingly, are able to accurately predict the degree of micropitting. The paper is more of a 3 course meal than a light lunch, so pull up a chair and enjoy a large serving of micropitting knowledge!

Open Access Link:
https://www.sciencedirect.com/science/article/pii/S0043164817309535

PCS review

Spotlight Paper

Effect of Base Oil Structure on Elastohydrodynamic Friction

Fundamental and extensive MTM research carried out on a wide range of well-defined fluids comparing the EHD friction properties over …

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Fundamental and extensive MTM research carried out on a wide range of well-defined fluids comparing the EHD friction properties over different contact conditions. The study confirmed crucial role the molecular structure of the base fluid plays in determining the increasingly important EHD friction coefficient.

Open Access Link:
https://link.springer.com/content/pdf/10.1007/s11249-016-0791-7.pdf

PCS review