An Exact and General Model Order Reduction Technique for the Finite Element Solution of Elastohydrodynamic Lubrication Problems

Habchi, Wassim; Issa, Jimmy

doi:10.1115/1.4035154

Cited by 26 publications

(11 citation statements)

References 28 publications

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“…This situation makes the discharge of the grease from the micro-bearings to be difficult, destroys the hydrodynamic lubrication in the friction contact area, weakens the film-forming capacity of the lubrication film, and further improves the coefficient of friction on the sample surface. The findings commensurate with that of Habchi and Issa [27] who researched a finite element solution of elastohydrodynamic lubrication problems. It is also necessary to mention that, there is a limit to the action depth threshold for the supplementary effect of micro-bearings on grease.…”

Section: Effect Of Different Surface Treatments On Aluminum Alloy Sur...supporting

confidence: 88%

Effects of Multi-Surface Texturing on the Tribological Properties of Aluminum Based Self-Lubricating Joint Bearing under Grease Condition

Owusu-Mensah

Hua

Tian

et al. 2023

Preprint

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Joint bearing contact surfaces of high-tech precision machinery applied particularly in the manufacturing industry undergo varying range of extreme temperature and pressure conditions, which subject them to frictional wear, tear and stress during operation in different environments of application. A continuous assessment of their resilient capacities is therefore necessary to avoid operational failure of core base component parts. The aim of this study is to assess the effects of multi-surface treatment and texturing processes on the frictional and stress performance of aluminum based self-lubricating joint bearing under grease condition. Using ANSYS software based on the Hertz contact theory and Boussinesqmodel for numerical simulations of rated static load contact, the study showed that under dry friction and grease lubrication, PTFE/ardex pad stabilizes the surface friction coefficient and effectively reduces the friction coefficient. Again, the friction coefficient of the aluminum self-lubrication increases with the texture share and the sample with 15% share shows the lowest friction coefficient (0.114), under lipid lubrication conditions. It is recommended for future research to conduct a wobble (transient dynamics) and thermodynamic analysis for the model, and attempt to optimize the friction resistance of self-lubricating joint bearing by adjusting the deposition process parameters like current value, temperature and element contact.

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Section: Effect Of Different Surface Treatments On Aluminum Alloy Sur...supporting

confidence: 88%

Effects of Multi-Surface Texturing on the Tribological Properties of Aluminum Based Self-Lubricating Joint Bearing under Grease Condition

Owusu-Mensah

Hua

Tian

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Rong-Tsong and Chao-Ho [13] proposed the fast and accurate solution of the coupled equations of thermal EHL. Habchi and Issa [14,15] obtained the coupled strategies and solution for finite-element modeling of thermal EHL problems. Hili et al [16] studied the effect of the speed and temperature on the film thickness, based on the thermal EHL experimental investigation.…”

Section: Introductionmentioning

confidence: 99%

Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Huo

Zhou²,

et al. 2019

Shock and Vibration

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Lubrication failures of axle box bearings can lead to accidents, such as bearing burnout and hot axle cutting. Presently, the modeling of the vehicle-track system dynamics rarely considers the nonlinear contact load of axle box bearings, and this leads to imperfection in the vehicle-track system dynamics calculation. And then, the load distribution and lubrication characteristics of axle box bearings are difficult to obtain. Therefore, in this paper, we fully consider the time-varying nonlinear contact load of bearings and track irregularity in establishing the bearing-wheel-rail system coupling-dynamics model. The dynamic response of axle box bearings is obtained by taking the vertical, strong impact-time-varying load on the carrying saddles as the external excitation. The load-balance equation of dynamic pressure lubrication is then obtained, according to the slicing method of bearing rollers. Finally, the elastohydrodynamic lubrication (EHL) model of axle box bearings is established considering thermal and scale effects. The results show that the central film thickness under thermal EHL was decreased by 13.61% compared with that under isothermal EHL. As the velocity of the contact pair increases, the thickness difference between thermal and isothermal EHL became larger. Thermal effects should be considered in the EHL model, in order to truly reflect the characteristics of EHL under a high speed.

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“…In parallel, researches are working to further increase the computational speed of Reynolds based approaches, (see e.g. [23][24][25]) and to make the Navier-Stokes approach computationally more affordable through model order reduction techniques, (see e.g. [26]).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Reynolds and Navier–Stokes Based Modeling Approaches for Isothermal Newtonian Elastohydrodynamic Lubrication

Scurria

Tamarozzi

Voronkov³

et al. 2021

Journal of Tribology

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When simulating elastohydrodynamic lubrication, two main approaches are usually followed to predict the pressure and fluid film thickness distribution throughout the contact. The conventional approach relies on the Reynolds equation to describe the thin lubricant film, which is coupled to a Boussinesq description of the linear elastic deformation of the solids. A more accurate, yet time consuming method is the use of Computational Fluid Dynamics in which the Navier-Stokes equations describe the flow of the thin lubricant film, coupled to a Finite Element solver for the description of the local contact deformation. This investigation aims at assessing both methods for different lubrication conditions in different EHL regimes and quantify their differences to understand advantages and limitations of both methods. This investigation shows how the results from both approaches deviate for three scenarios (cfr Fig. 12): 1. Inertial Contributions (Re > 1), i.e. thick films, high speed, low viscosity; 2. High shear stresses leading to secondary flows; 3. Large deformations of the solids leading to inaccuracies of the Boussinesq equation.

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An Exact and General Model Order Reduction Technique for the Finite Element Solution of Elastohydrodynamic Lubrication Problems

Cited by 26 publications

References 28 publications

Effects of Multi-Surface Texturing on the Tribological Properties of Aluminum Based Self-Lubricating Joint Bearing under Grease Condition

Effects of Multi-Surface Texturing on the Tribological Properties of Aluminum Based Self-Lubricating Joint Bearing under Grease Condition

Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Quantitative Analysis of Reynolds and Navier–Stokes Based Modeling Approaches for Isothermal Newtonian Elastohydrodynamic Lubrication

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