A simple deterministic plastoelastohydrodynamic lubrication (PEHL) model in mixed lubrication

Azam, Abdullah; Dorgham, Abdel; Morina, Ardian; Neville, Anne; Wilson, Mark C. T.

doi:10.1016/j.triboint.2018.11.011

Cited by 30 publications

(28 citation statements)

References 62 publications

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“…The PEHL model applied in the current study is based upon the recent publication by the present authors [46]. The application of this elasto-plastic deformation algorithm requires modifications to be made to the Reynolds solver.…”

Section: Plastic Deformation Modellingmentioning

confidence: 99%

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Modelling tribochemistry in the mixed lubrication regime

Azam

Ghanbarzadeh

Neville

et al. 2019

Tribology International

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Section: Plastic Deformation Modellingmentioning

confidence: 99%

“…In this way, by repeating this process, the solution moves from purely elastic to elasto-plastic until a converged is achieved. More details on the method can be found in [46] and [47].…”

Section: Plastic Deformation Modellingmentioning

confidence: 99%

Modelling tribochemistry in the mixed lubrication regime

Azam

Ghanbarzadeh

Neville

et al. 2019

Tribology International

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“…In the following, first the mixed lubrication model is detailed and then the tribochemical model is outlined. The integration of these two models and the solution procedure have been presented elsewhere [37,40] but details are provided in the following sections for completeness.…”

Section: The Complete Tribochemical Mixed Lubrication Modelmentioning

confidence: 99%

“…It includes an elastic as well as plastic part. The algorithm implemented in this study to deal with plastic deformation is based upon the authors previously published work [40]. At this stage, within the mixed lubrication solver, the deformation cannot be separated into individual components.…”

Section: Mixed Lubrication Modelmentioning

confidence: 99%

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The mutual interaction between tribochemistry and lubrication: Interfacial mechanics of tribofilm

Azam

Dorgham

Parsaeian

et al. 2019

Tribology International

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A new mechanism for the action of antiwear tribofilms is proposed. The antiwear action of ZDDP additive is believed to be mainly due to the formation of tribofilms that reduce wear by chemical action. In this study, a mixed lubrication model is developed and tribofilm growth integrated into this model to simulate the effects of tribofilms on lubrication. The dynamic evolution of the contacting surfaces due to plastic deformation, wear and tribofilm growth continuously change the lubrication characteristics inside the contact. It is observed that the growth of tribofilm roughens the contact and increase contact severity. It was found that this roughness increase also helps to entrain more lubricant, resulting in thicker lubricant films. Therefore, the plot of the evolution of film thickness ratio (h central (t)/R q (t)) shows that the lubrication regime is improved by the presence of tribofilm. Therefore, not only the chemical presence but the physical presence of the tribofilm on the surfaces also helps to improve contact performance by retaining more lubricant and improving the lubrication regime.

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Plasto‐elastohydrodynamic lubrication performance of greased ellipsoid contact

Zheng

Gong

et al. 2021

Lubrication Science

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The plasto-elastohydrodynamic lubrication (PEHL) model of the greased ellipsoid contact is established and solved numerically. In doing so, the increment theory of the plastic surface is adopted to solve the residual deformation, and the fast Fourier transform (FFT) method is employed to accelerate the deformation and stress calculations. Meanwhile, the effeteness of the PEHL model is verified through the residual stress experiment and finite element method. It is found that the plastic behaviour results in a reduction in the maximum grease film pressure. Under heavy load conditions, the grease with large rheology index, large tangential modulus or high entrainment speed of the lubricant is helpful to reducing the maximum residual deformation and maximum residual stress of the greased ellipsoid contact.

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A simple deterministic plastoelastohydrodynamic lubrication (PEHL) model in mixed lubrication

Abstract: This is a repository copy of A simple deterministic plastoelastohydrodynamic lubrication (PEHL) model in mixed lubrication.

Cited by 30 publications

References 62 publications

Modelling tribochemistry in the mixed lubrication regime

Modelling tribochemistry in the mixed lubrication regime

The mutual interaction between tribochemistry and lubrication: Interfacial mechanics of tribofilm

Plasto‐elastohydrodynamic lubrication performance of greased ellipsoid contact

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