Experimental Study of the Rheology of Grease by the Example of CIATIM-221 and Identification of Its Behavior Model

Nosov, Yuriy; Kamenskikh, Anna A.

doi:10.3390/lubricants11070295

Cited by 4 publications

(3 citation statements)

References 76 publications

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“…In the work of Hussein et al [ 51 ], the authors demonstrated that the use of nanosized silica significantly reduced the coefficient of friction and improved the rheological properties, including viscosity versus temperature and shear rate curves, flow curves and hysteresis areas of the lubricants tested. In the work of Nosov and Kamenskikh [ 106 ], the authors demonstrated an improvement in the tribological and rheological properties of vegetable greases under the influence of the addition of nanometric silica. In the work of Uppar et al [ 107 ], the authors demonstrated that the introduction of nano-additives into the structure of bio-lubricants improves the rheological properties and significantly reduces wear.…”

Section: Resultsmentioning

confidence: 99%

Influence of Silicon Additives on Tribological and Rheological Test Results for Vegetable Lubricants

Kozdrach,

Drabik,

Szczerek

2023

Materials

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This paper describes an investigation of the effects of silicone-containing additives on the tribological and rheological properties of various lubricant blends. Aerosil® and layered silicate were used to modify lubricants containing rapeseed, linseed and soy oil that were thickened with soap thickener. Tribological tests were carried out using a four-ball concentric contact tester. On the basis of the data obtained from the tribological studies of the selected lubricant blends, it was concluded that the addition of amorphous silica increased the anti-seizure and anti-wear properties of the tested lubricants. The addition of montmorillonite caused a significant increase in the values of the individual parameters determining the level of lubricating properties of the tested lubricants in comparison with the lubricants modified with the silica additive. Based on the results of the rheological tests of the studied lubricants, it was found that the applied additives caused a change in the dynamic viscosity and chemical structure of the tested lubricants, expressed by a change in the values of the G′ and G″ indices. The main finding of this manuscript was to demonstrate that the use of montmorillonite and aerosil additives improves the functional properties of vegetable-based plastic lubricants. The performance of tribological and rheological tests is of great scientific importance, as it provides an insight into the interaction of siliceous additives with the results of tribological tests on vegetable-oil-based greases. These findings make it possible to determine the behaviour of the lubricant under load and add to the knowledge of vegetable greases.

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Section: Resultsmentioning

confidence: 99%

Influence of Silicon Additives on Tribological and Rheological Test Results for Vegetable Lubricants

Kozdrach,

Drabik,

Szczerek

2023

Materials

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“…This model has a number of advantages: a sufficient description of material behavior, the active application of this model by other researchers [29,54], the relative simplicity of the mathematical description, etc. The numerical algorithm has been tested early for the description of lubricant behavioral models [55].…”

Section: On the Choice Of A Mathematical Modelmentioning

confidence: 99%

The Study Influence Analysis of the Mathematical Model Choice for Describing Polymer Behavior

Kamenskikh,

Nosov,

Bogdanova

2023

Polymers

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The article considered the three types of description of the material behavior model: elastic, elastic–plastic, and viscoelastic. The problem is considered in the framework of deformable solid mechanics. The paper considers the possibility of describing modern polymeric and composite materials used as antifriction sliding layers in the viscoelasticity framework. A numerical procedure for finding the coefficients to describe the viscoelastic material behavior using the Prony model has been implemented. Numerical results and experimental data are compared. The model problem of spherical indenter penetration into polymer half-space is realized. The influence of the system discretization on the numerical solution is analyzed. The influence of the polymer behavior description in static and dynamic problem formulations is analyzed.

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“…Behavior analysis of the bearing, both in the presence of lubrication in the recesses and in its absence (unfavorable case), is of interest for different sliding layer materials. The issue of the geometric arrangement of recesses for lubrication is also relevant [8,49].…”

Section: Problem Descriptionmentioning

confidence: 99%

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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Polymers have gained a foothold in the international market and are actively utilized at a large scale in various industries. They are used as sliding layers in various types of friction units. However, there is a lack of research on their deformation behavior under different design conditions. This work is focused on studying the influence of the geometrical design of lubrication recesses in a polymer sliding layer operating under conditions of frictional contact interaction. The article investigated an element of bridge-bearing steel plate with recesses for lubrication. Two geometrical configurations of recesses are studied: the annular groove and spherical well in the engineering software package ANSYS Mechanical APDL. Polytetrafluoroethylene (PTFE) is considered an elastic-plastic sliding layer. A comparative analysis of two models with different geometrical configurations of cutouts for lubrication, with/without taking into account its volume in the recess, has been conducted. The article establishes that in the absence of lubrication in the recesses, large deformations of the polymer sliding layer occur. This effect negatively affects the structure as a whole. Changing the geometry of the recess for lubrication has the greatest effect on the intensity of plastic deformations. Its maximum level is lowered by almost ~60% when spherical notches are used for lubrication instead of grooves. The friction coefficient of the polymer has a great influence on the contact tangential stress. At the experimental coefficient of friction, it is lowered on average by ~85%. The friction coefficient of the lubricant has almost no effect on the deformation of the cell (<1%).

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Experimental Study of the Rheology of Grease by the Example of CIATIM-221 and Identification of Its Behavior Model

Cited by 4 publications

References 76 publications

Influence of Silicon Additives on Tribological and Rheological Test Results for Vegetable Lubricants

Influence of Silicon Additives on Tribological and Rheological Test Results for Vegetable Lubricants

The Study Influence Analysis of the Mathematical Model Choice for Describing Polymer Behavior

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

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