Elastohydrodynamic Lubrication Line Contact Based on Surface Elasticity Theory

Su, Jie; Hong-xia, Song; Ke, Liao-Liang

doi:10.1115/1.4047088

Cited by 4 publications

(2 citation statements)

References 72 publications

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“…However, the size effect or surface effect was not directly considered in these studies. Only Su et al [24] discussed the surface effect on EHL contact for an elastic halfplane based on surface elasticity theory.…”

Section: Introductionmentioning

confidence: 99%

Surface effects on elastohydrodynamic lubrication contact of piezoelectric materials with non-Newtonian fluid

Su,

Song,

2023

Smart Mater. Struct.

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By using surface piezoelectricity theory, this article investigates the elastohydrodynamic lubrication (EHL) line contact of a transversely isotropic piezoelectric half-plane with consideration of the surface effect under a rigid cylindrical punch. The surface effect in the surface piezoelectricity theory is mainly described by the following parameters: surface piezoelectric constant, surface dielectric constant, surface elastic constant, and residual surface stress. The punch is treated as the electrical insulator. The lubricant, whose viscosity and density are dependent on fluid pressure, is chosen as non-Newtonian fluid. Firstly, by analyzing the frictionless dry contact of piezoelectric materials with surface effect, dry contact pressure distribution and EHL film thickness equation are obtained. Then, an iterative method is proposed to get fluid pressure and film thickness at lubricant contact region by calculating the fluid-solid coupled nonlinear equations. Effects of surface dielectric constant, surface piezoelectric constant, surface elastic constant, residual surface stress, punch radius, entraining velocity, and slide/roll ratio on the film thickness and fluid pressure are examined. Our analysis indicates that surface effect has an essential effect on the EHL contact behaviors of piezoelectric materials at micro-/nano-scales.

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Section: Introductionmentioning

confidence: 99%

Surface effects on elastohydrodynamic lubrication contact of piezoelectric materials with non-Newtonian fluid

Su,

Song,

2023

Smart Mater. Struct.

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“…When such lubricated contacts are mathematically modeled, the rheology of the lubricant is considered to be Newtonian or non-Newtonian. The former case is significantly simpler and a lot of studies for the cases of homogeneous material and coated solids [1][2][3][4][5][6][7][8][9][10] were dedicated to it. The latter case is more complex, but it better corresponds to the real behavior of lubricants because polymeric additives make their behavior significantly non-Newtonian, which allows for a distinctly different lubricant behavior at low and high shear stresses.…”

Section: Introductionmentioning

confidence: 99%

A General Case of a Line Contact Lubricated by a Non-Newtonian Giesekus Fluid

Kudish,

Volkov

2023

Mathematics

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A steady plane hydrodynamic problem of lubrication of a lightly loaded contact of two parallel cylinders lubricated by a non-Newtonian fluid with Giesekus rheology is considered. The advantage of this non-Newtonian rheology is its ability to properly describe the real behavior of formulated lubricants at high and low shear stresses. The problem is solved by using a modification of the regular perturbation method with respect to the small parameter α, characterizing the degree to which the polymeric molecules of the additive to the lubricant follow the streamlines of the lubricant flow. It is assumed that the lubricant relaxation time and the value of α are of the order of the magnitude of the ratio of the characteristic gap between the contact surfaces and the contact length. The obtained analytical solution of the problem is analyzed numerically for the dependencies of the problem characteristics such as contact pressure, fluid flux, lubrication film thickness, friction force, energy loss in the lubricated contact, etc., on the problem input parameters.

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One Case of a Lubrication Problem for a Line Contact of Elastic Solids with Soft Double Coatings

Kudish¹,

Volkov

2023

Advanced Structured Materials

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Elastohydrodynamic Lubrication Line Contact Based on Surface Elasticity Theory

Cited by 4 publications

References 72 publications

Surface effects on elastohydrodynamic lubrication contact of piezoelectric materials with non-Newtonian fluid

Surface effects on elastohydrodynamic lubrication contact of piezoelectric materials with non-Newtonian fluid

A General Case of a Line Contact Lubricated by a Non-Newtonian Giesekus Fluid

One Case of a Lubrication Problem for a Line Contact of Elastic Solids with Soft Double Coatings

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