Stress-strain State of the Surface Layer of Parts During the Implementation of Tribotechnical Running-in and Recovery Technologies

Аулин, Виктор; Lysenko, Serhii; Гриньків, А. В.; Yatsun, Volodymyr; Skrynnik, Ivan; Gupka, Andriy

doi:10.32515/2664-262x.2019.1(32).103-113

Cited by 5 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dissipation of energy is the main feature of the current equilibrium, but, in accordance with the principle of self-integrity of equilibrium, the system cannot spontaneously leave it, and under external influence, the processes aimed at its compensation intensify. This is similar to the manifestation of the phenomena of electromagnetic induction [9]. According to the principle of minimum entropy production, the laws of nature [10] assume several options for the development process (organization), and the one that corresponds to the minimum dissipation of energy is realized.…”

Section: Literature Reviewmentioning

confidence: 77%

Detection of changes in the characteristics and properties of friction zones of parts of tribocoupling systems and machine assemblies based on the entropy approach

Aulin,

Tykhyi,

Kuzyk

et al. 2023

View full text Add to dashboard Cite

The role of entropy in the processes of friction and wear of tribocoupling materials of moving parts is clarified. The implementation of the effect of self-organization of materials depending on the production of entropy is theoretically substantiated. The conditions of self-organization with negative entropy production were obtained. The relationship between the rate of volumetric wear of tribocoupled parts and the production of excess entropy and its flow is determined. Expressions for the intensity of wear of tribocoupling parts were obtained, taking into account thermal processes in the friction zone. The trends of changes in the characteristics and properties of tribocouplers of components, systems and machine aggregates with a change in entropy have been clarified.

show abstract

Section: Literature Reviewmentioning

confidence: 77%

Detection of changes in the characteristics and properties of friction zones of parts of tribocoupling systems and machine assemblies based on the entropy approach

Aulin,

Tykhyi,

Kuzyk

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The stimulus for the development of nanotribology is considered to be a fundamental understanding of the role of a set of microcontacts that occur when the surfaces of tribocoupled parts are in contact. At the same time, the total area of actual contacts may be significantly less than theoretical estimates [2].…”

Section: Introductionmentioning

confidence: 81%

“…The relationship between the processes of friction and adhesion determined by the internal molecular structure was determined. For dry tribocontacts of materials, adhesive and frictional hysteresis should not be observed [1,26]. There is a model that establishes the relationship between shear stress and adhesion work (in the case of dry contacts).…”

Section: Fig 1 Block Diagram Of the Principle Of Measurement Of The E...mentioning

confidence: 99%

“…Level approach in tribology [1][2][3] shows that the phenomena and processes in the contact area of tribojunctions of samples and parts are studied at the macro-, meso-, micro-and nano-levels. With the transition to a qualitatively new nanolevel of research, it was found that the physical processes in tribocontacts are much richer and more diverse and include many new phenomena: phase transitions due to the shear arrangement of thin films in the "probe-part surface" contact; the formation of contact "jumpers"; chemical, electrochemical and triboelectric effects; effects related to humidity, superconductivity, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Justification of the effect of the regularities of the flow of nanotribological processes in the materials of joint parts on the increase of wear resistance, reliability and efficiency of the functioning of machines and mechanisms

Aulin,

Tykhyi,

Kuzyk

et al. 2023

View full text Add to dashboard Cite

The article elucidates the essence of nanotribological processes in the materials of conjugation of samples of parts by the methods of the surface force apparatus, scanning tunneling and atomic force microscopy. The substantiation of the mechanisms of their occurrence is given by the methods of molecular dynamics and classical contact mechanics. Attention is paid to dry adhesive and contactless dynamic friction of conjugated samples, physical processes in "sticking-sliding" tribocontacts, adhesive effects, etc. The values of the lateral and normal forces acting on the probe were analyzed. The probe was considered as a collection of point particles of concentrated mass with a multiatomic structure of the material. The contact and movement of the probe with the surface of the sample was considered in the "probe-surface" system with minimal potential energy and lateral load and taking into account conservative and dissipative forces. The effect of "sticking-sliding" is substantiated with the help of the apparatus of surface forces. The atomic periodicity of the effect is explained on the basis of the model of the formation and breaking of adhesive bonds and the "atom-magnet" model. It is shown that the patterns of "sticking-sliding" processes can be determined by using the parameters of shear stress and specific work of adhesion. It is advisable to use the Johnson-Kendall-Roberts theory to explain the elastic adhesive contacts, and the Deryagin-Mullier-Toporov theory for the residual friction force and probe separation force. It is shown that there is a significant connection between friction and adhesion processes. The correlation between the macroscopic value of the surface energy of materials and their shear modulus for homogeneous contacts was determined. On the basis of adhesive effects and the effect of "sticking-sliding", it is possible to control frictional forces and create favorable conditions for their absence, which gives grounds for obtaining high wear resistance of tribo-joints of parts, their reliability and maximum efficiency of the functioning of machines and mechanisms

show abstract

“…Solving the problem of increasing the tribological reliability and durability [1,2] of tribocoupled elements of car parts requires a comprehensive approach [3]. This includes: the following measures: development of modern research methods and kinetic criteria for evaluating processes in the zone of frictional contact; creation of new antifriction composite alloys; methods of controlling the surface strength of materials during friction and wear [4,5].…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Structural and energetic self-organization of antifriction composite materials of car parts during friction and wear

Gypka,

Aulin,

Mironov

et al. 2024

View full text Add to dashboard Cite

The development and research of composite materials for heavily loaded tribo-couplings of car parts was based on the main provisions of the concept of structural and energetic adaptability of their materials during friction and wear. The presented data of experimental studies of the effect of ultrasonic treatment of materials on the nature of the change in the coefficient of friction depending on the value of the specific load at a constant sliding speed. Data were obtained that characterize the features of structural adaptation and self-organization during friction and wear of copper and lead alloys. The research was carried out using a universal tribometer according to the "finger-disc" end surface contact scheme in the medium of inactive petroleum jelly. The use of composite wear-resistant materials is proposed to increase the tribological efficiency of car parts, units and assemblies. Experimental studies and analysis of the obtained data were carried out on the basis of the developed parametric scheme for the study of tribocouples of samples and parts using the main provisions of system analysis.

show abstract

Stress-strain State of the Surface Layer of Parts During the Implementation of Tribotechnical Running-in and Recovery Technologies

Cited by 5 publications

References 0 publications

Detection of changes in the characteristics and properties of friction zones of parts of tribocoupling systems and machine assemblies based on the entropy approach

Detection of changes in the characteristics and properties of friction zones of parts of tribocoupling systems and machine assemblies based on the entropy approach

Justification of the effect of the regularities of the flow of nanotribological processes in the materials of joint parts on the increase of wear resistance, reliability and efficiency of the functioning of machines and mechanisms

Structural and energetic self-organization of antifriction composite materials of car parts during friction and wear

Contact Info

Product

Resources

About