Determination of lubricant compressibility in EHL conjunctions using the Hybrid technique

Jolkin, Alexei; Larsson, Roland

doi:10.1016/s0167-8922(00)80163-7

Cited by 6 publications

(7 citation statements)

References 11 publications

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“…It is based on the inverse calculation of pressure matrix from the elastic deformations of the contact surfaces derived from lubricant film thickness. In general, it represents similar approach to those previously presented by other authors [18][19][20][21][23][24][25]. Nevertheless, there is a little modification consisting of the use of a generalized convolution approach to speed up the pressure calculation and represents a bit simpler alternative to the full multigrid and multilevel multi-integration.…”

Section: Pressure Evaluation Proceduresmentioning

confidence: 78%

“…Larsson et al [23] used this approach to study the effects of soap lumps passing through a grease-lubricated EHD contact on the film thickness and pressure distribution. Jolkin and Larsson [24] replaced colorimetric analysis of chromatic interferograms by the multi-channel interferometry method in the effort to overcome the limitations caused by the film thickness calibration procedures. Proposed hybrid technique for the film thickness and pressure determination within EHDlubricated contacts was used for the determination of lubricant compressibility.…”

Section: Introductionmentioning

confidence: 99%

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Effect of surface dents on contact pressure in elastohydrodynamic contacts

Křupka

Vrbka

Vaverka

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part J:

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Nowadays film thickness measurement techniques can provide precise data for the detailed studies of the behaviour of lubricated contacts including transient operational conditions. Contact pressure is in relation with deformation of rubbing surfaces, which can be derived from experimentally evaluated film thickness. Even though the pressure distribution evaluated from measured film thickness is very sensitive to its accuracy, this approach represents a powerful tool for elastohydrodynamic pressure determination; thanks to the relative wide availability of film thickness measurement techniques. Chromatic interferograms can be captured within a few microseconds so that this approach seems to be promising in obtaining relevant pressure data even within non-smooth lubricated contacts. This article presents the results of the effort to extend the applicability of the pressure-film thickness evaluation approach to the non-smooth surfaces. It was found that the main problem is to obtain the film thickness distribution within the whole contact including the inside portion of the deep surface features (e.g. dents). That is why the combination of film thickness data and undeformed dent topography was suggested to overcome these limitations. This approach was validated through the comparison with numerical solution using dented surface and was tested on selected dented contacts operated under thin film and very thin film lubrication conditions.

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Section: Pressure Evaluation Proceduresmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Effect of surface dents on contact pressure in elastohydrodynamic contacts

Křupka

Vrbka

Vaverka

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…184 Electrohydrodynamic lubrication is that regime where there is very high contact pressure which causes elastic deformations of surfaces. 185 From ancient times, nuclear methods have also been used for wear and corrosion measurement. The nuclear reaction-based method using neutron irradiation and the thin-layer activation by accelerated charged particles are the two methods used in various applications worldwide.…”

Section: Enhancement Of Biolubricant Properties By Nanoparticlesmentioning

confidence: 99%

“…Also, frictional losses encountered in this are also very less as compared to other regimes . Electrohydrodynamic lubrication is that regime where there is very high contact pressure which causes elastic deformations of surfaces …”

Section: Biolubricants: Nature and Challengesmentioning

confidence: 99%

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A Review on the Effect of Metal Oxide Nanoparticles on Tribological Properties of Biolubricants

Uniyal,

Gaur,

Yadav

et al. 2024

ACS Omega

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This review provides a comprehensive and accessible literature review on the integration of nanoparticles into biolubricants to enhance wear and friction regulation, thus improving the overall lubricated system performance. Nanotechnology has significantly impacted various industries, particularly in lubrication. Nanobiolubricants offer promising avenues for enhancing tribological properties. This review focuses on oxide nanoparticles, such as zinc oxide (ZnO), aluminum oxide (Al 2 O 3 ), copper oxide (CuO), titanium dioxide (TiO 2 ), zirconium dioxide (ZrO 2 ), and graphene oxide (GO) nanoparticles, for their ability to enhance lubricant performance. The impact of nanoparticle concentration on biolubricant properties, including viscosity, viscosity index, flash point temperature, and pour point temperature, is analyzed. The review also addresses potential obstacles and limitations in nanoparticle incorporation, aiming to propose effective strategies for maximizing their benefits. The findings underscore the potential of nanobiolubricants to improve operational efficiency and component lifespan. This review aims to provide valuable insights for researchers, engineers, and professionals in exploring and leveraging nanotechnology's potential in the lubrication industry. This review paper explores the basics of tribology along with its significance, green principles, mechanisms, and energy savings because of friction, wear, and lubrication. Condition monitoring techniques are also explored to achieve brief knowledge about maintaining reliability and safety of the industrial components. Recent advances in tribology including superconductivity, biotribology, hightemperature tribology, tribological simulation, hybrid polymer composite's tribology, and cryogenic tribology are investigated, which gives a thorough idea about the subject.

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Evaluation of Lubricant Film Thickness in Helical Gear on Contact Line at Critical Points by Using Elastohydrodynamic Model and It’s Comparison with Kisssoft Result

Kumar,

2023

Algorithms for Intelligent Systems

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Determination of lubricant compressibility in EHL conjunctions using the Hybrid technique

Cited by 6 publications

References 11 publications

Effect of surface dents on contact pressure in elastohydrodynamic contacts

Effect of surface dents on contact pressure in elastohydrodynamic contacts

A Review on the Effect of Metal Oxide Nanoparticles on Tribological Properties of Biolubricants

Evaluation of Lubricant Film Thickness in Helical Gear on Contact Line at Critical Points by Using Elastohydrodynamic Model and It’s Comparison with Kisssoft Result

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