Naslov
Lubricated Contact Analysis Using the Finite Area Method (poster)

Autori
Balatinec, Luka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
The 17th OpenFOAM Workshop

Mjesto i datum
Cambridge, Ujedinjeno Kraljevstvo, 11.07.2022. - 14.07.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Lubricated Point Contact, Finite Area Method, FVM, foam-extend

Sažetak
Numerical modelling has emerged as a valid alternative to costly experimental methods used for contact analysis in various applications (metal forming, bearing design, etc.). The existing design tools rarely focus on calculating the effects of microscopic contact and friction. Numerical methods can be a useful add-on for calculating such effects and also lubrication effects for rough surfaces in contact. A numerical framework based on the Finite Area Method (FAM) [1] is presented as a viable tool for simulations of lubricated contact of rough surfaces [2]. A FAM contact boundary condition was implemented for the hyperelastoplastic finite volume deformation solver [3], as a part of the foam-extend library. The framework combines lubricant flow, thermal and asperity contact model, which enables the calculation of contact pressure and traction for all lubrication regimes. Moreover, the framework provides additional data, such as film thickness, temperature, contact area, etc., which is invaluable for analysing the properties of lubricants. It was used for numerical simulations of a ball-on-disc tribometer and the results were validated against numerical and experimental data [4, 5]. Two sets of simulations were performed with varying entrainment speeds and contact loads: for a hydrodynamic lubrication regime (Turbo T9 oil) and a mixed lubrication regime (Turbo T68 oil). The results are presented showing friction thickness, contact and hydrodynamic pressure, contact area, film temperature, etc. In conclusion, the numerical framework showed that acceptable accuracy can be achieved for numerical simulations of lubricated point contacts, if there is complete information regarding the lubricant transport properties and a measured surface roughness.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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