Theory of viscoelastic lubrication

Scaraggi, Michele; Persson, B. N. J.

doi:10.1016/j.triboint.2013.12.011

Cited by 60 publications

(42 citation statements)

References 38 publications

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“…This was pioneered by Hooke and Huang 13 and later investigated in some other studies. 14,15 Within the context of mixed EHL, the modified Reynolds equation by Patir and Cheng 16 has been utilized in soft contacts to predict the changes in the lubricant flow due to the surface roughness. [17][18][19] For modeling the behavior of asperities, the statistical micro-contact model by Greenwood-Williamson known as GW 20 has been used in some studies, [21][22][23] while the fractal models have been utilized in some other studies.…”

Section: Introductionmentioning

confidence: 99%

Mixed lubrication of soft contacts: An engineering look

Masjedi

Khonsari

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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Section: Introductionmentioning

confidence: 99%

Mixed lubrication of soft contacts: An engineering look

Masjedi

Khonsari

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…In this case, a significant change in the Newtonian master curve is associated with softening of the PDMS at elevated temperatures. The characteristic positive slope of the apparent boundary regime is again associated with the viscoelastic effects in the compliant substrate (Bongaerts, Fourtouni, & Stokes, 2007;Persson & Scaraggi, 2009;Scaraggi & Persson, 2014). The G50 suspensions marginally reduce friction in a similar fashion to the case at the room temperature; however, it appears that the shape of the curve for the suspension is similar to the Newtonian master curve, suggesting minimal contribution from the particle ball-bearing effect.…”

Section: Tribological Behaviour Of Starch Suspensions and The Influenmentioning

confidence: 94%

Lubrication of starch in ionic liquid–water mixtures: Soluble carbohydrate polymers form a boundary film on hydrophobic surfaces

Yakubov

Zhong

et al. 2015

Carbohydrate Polymers

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Soluble starch polymers are shown to enhance the lubrication of ionic liquid-water solvent mixtures in low-pressure tribological contacts between hydrophobic substrates. A fraction of starch polymers become highly soluble in 1-ethyl-3-methylimidazolium acetate (EMIMAc)-water solvents with ionic liquid fraction ≥60wt%. In 65wt% EMIMAc, a small amount of soluble starch (0.33wt%) reduces the boundary friction coefficient by up to a third in comparison to that of the solvent. This low-friction is associated with a nanometre thick film (ca. 2nm) formed from the amylose fraction of the starch. In addition, under conditions where there is a mixture of insoluble starch particles and solubilised starch polymers, it is found that the presence of dissolved amylose enhances the lubrication of starch suspensions between roughened substrates. These findings open up the possibility of utilising starch biopolymers, as well as other hydrocolloids, for enhancing the performance of ionic liquid lubricants.

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“…Content ( sliding friction tests [38]. However, the lubricant can significantly remove the shearing component of friction.…”

Section: Compoundmentioning

confidence: 99%