Non-Newtonian effects on porous elastic journal bearings

Sakim, Anas; Nabhani, Mohamed; Khlifi, Mohamed El

doi:10.1016/j.triboint.2017.12.018

Cited by 14 publications

(16 citation statements)

References 22 publications

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“…As an additional means of tracking the running-in of the system, four consecutive Stribeck curves [22] are recorded after 1,2,3,4,5,8,11,14,17,20,28,36, and 44 h of mixed lubrication operation, which adds an extra 2.5 h of duration to the entire test procedure. The associated rotational speed profile shown in Fig.…”

Section: Experimental Workflowmentioning

confidence: 99%

“…However, there have been some very recent developments regarding the theory of PJB lubrication [10,11] or the lack thereof [12], as well as the effect of laser surface texturing [13] or mesogenic fluids as novel high-performance lubricants [14] on friction and wear performance. The wear resistance of porous iron bearings additivated with boron nitride was also recently studied [15].…”

Section: Introductionmentioning

confidence: 99%

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An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

Eder¹,

Ielchici²,

Krenn³

et al. 2018

Preprint

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We present an experimental and analysis workflow to characterize the tribological behavior and the wear resistance of porous journal bearing systems operating at high loads and small rotational speeds. Our approach consists of a laser-instrumented tribometer that allows parallel testing of five bearings, an experimental procedure that is optimized for producing sufficient wear during mixed lubrication operation while maintaining realistic operating conditions, as well as several methods to visualize and quantify bearing wear. The simultaneous testing of five bearings prevents outliers from distorting the results and yields a statistical estimation of the performance variations between nominally equivalent tribosystems. We showcase our approach by analyzing the influence of the bearing material and its porosity on mixed-lubrication friction and wear.

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Section: Experimental Workflowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

Eder¹,

Ielchici²,

Krenn³

et al. 2018

Preprint

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show abstract

“…Another benefit of porous bearings is that they do not need external oil supplies until their bears are added with their permeable content impregnated with oil.The principle advantage of porous journal bearings is that they can be utilized in zones where the ordinary bearings are unusable, for example, in circumstances of clog and detachment for lubricants and, in applications where contaminations is intolerable, for example, in agro nourishment and textile industries. Sakim et.al [9] in 2018 studied numerically the impact of the couple stresses on finite porous elastic journal bearing execution. The authors demonstrated that the couple stresses increment the load capacity and diminished the frictional factor.…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of a Long Porous Partial Journal Bearing using Couple Stress Fluid

Nisha*,

Govindarajan

2019

IJRTE

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After effects of studies led on a long porous partial journal bearing for couple stress fluid are thus displayed. Performance characteristics presently determined incorporate the time-height relationship, Fluid film force, Flow rate, frictional force alongside the coefficient of friction. Plan/Technique/Approach -The paper shows a solution for the squeeze film lubrication of a thick, porous, with couple stress fluid model. It is determined that the changed Reynolds condition inferred the fluid film pressures. The modified state of Reynolds equation is analytically solved and closed form expressions are shown for the time-height, the flow rate and friction force with frictional coefficient numerically with the given starting condition using MATLAB programming, the first non-linear equation in the time-height relationship is resolved. The effects on the squeeze film characteristics of couple stresses and permeability are discussed. Findings – It can be seen that the couple stress parameter enhances the bearing characteristics. The bearing performance can be improved with the increase of couple stress parameter ( l  ), eccentricity ratio (ϵ), permeability parameter (ψ). Additional study may be performed using the couple stress fluid model, including the magnetic effect with heat and mass transfer. This model can be used to compare further with other models such as micropolar fluid, rabinowitsch fluid and for comparative study, which models are the most suitable for improving bearing system performance.

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“…Much of the seminal work on PJBs was published between the 1950s and the 1980s [1,2,9]. However, there have been some very recent developments regarding the theory of PJB lubrication [10,11] or the lack thereof [12], as well as the effect of laser surface texturing [13] or mesogenic fluids as novel high-performance lubricants [14] on friction and wear performance. The wear resistance of porous iron bearings additivated with boron nitride was also recently studied [15].…”

Section: Introductionmentioning

confidence: 99%

An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

Eder

Ielchici

Krenn

et al. 2018

Tribology International

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Non-Newtonian effects on porous elastic journal bearings

Cited by 14 publications

References 22 publications

An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

Performance Characteristics of a Long Porous Partial Journal Bearing using Couple Stress Fluid

An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime

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