Complex microtopography analysis in sliding friction of steel-ferodo material pair

Czifra, Árpád; Horváth, Sándor

doi:10.1007/s11012-010-9422-9

Cited by 14 publications

(8 citation statements)

References 6 publications

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“…One of the groups of worn surfaces was created by abrasive wear processes where surfaces were characterized by scratches and grooves, while the other group of worn surfaces consisted of topographies to be characterized by splits/accretions as a result of adhesion or tribochemical processes. Wear test results and measurement methodologies are available in the following references (Czifra et al, 2008;Czifra and Horváth, 2011).…”

Section: Methodsmentioning

confidence: 99%

Sdq-Sdr Topological Map of Surface Topographies

Czifra

Barányi

2020

Front. Mech. Eng.

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The reliable characterization of surface topographies-especially in case of tribological processes-requires complex and comprehensive solution methods. The use of a combination of roughness parameters offers effective solutions in many cases. In our study, we found a close correlation between the Sdq-Sdr parameter pair and we applied the two parameters as a topological map. Surface topographies resulting from different machining techniques (turned, milled, ground, honed, electric discharge machined, and sintered) were placed in the topological map and their possibilities of use were explored. It was established that surfaces with an orientation characteristically have lower Sdq-Sdr value pairs than non-oriented or multi-oriented surfaces; however, surface defects, injuries and machining discrepancies increase the values of Sdq-Sdr parameters. Then the Sdq-Sdr topological map was applied for worn surfaces resulting from abrasive and tribochemical processes, and it was established that the worn surfaces examined are characterized by small Sdq-Sdr values. Test results showed that in case of manufacturing processes, the topological map is suitable for identifying manufacturing discrepancies and manufacturing defects, and it highlights structural changes in the microgeometry in the course of the wear process.

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Section: Methodsmentioning

confidence: 99%

Sdq-Sdr Topological Map of Surface Topographies

Czifra

Barányi

2020

Front. Mech. Eng.

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“…As is known, real treated surfaces are never absolutely smooth but always have micro- or macroscopic irregularities (of technological character) forming the rough surface. Despite the extremely small sizes of such irregularities, they affect the different service properties of tribo-conjugation (Bhushan, 1998; Carbone and Bottiglione, 2011; Czifra and Horvath, 2011; Thomas, 1982). In the contemporary stage of engineering, optimal design of friction pair details providing increase of efficiency of friction pair elements is a of great value (Gadzhiev and Mirsalimov, 2004; Halouani et al., 2014; Mirsalimov, 2006a, 2006b, 2008, 2009a, 2009b, Mirsalimov et al., 2013; Meng et al., 2014; Sayyad and Kumar, 2012; Shang et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

Inverse problems of damage mechanics for a hub of a friction pair

Мирсалимов

Ахундова

2016

International Journal of Damage Mechanics

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We consider a problem of fracture mechanics for a hub of a friction pair during operation. It is assumed that near the friction surface the hub has a rectilinear crack of length 2' 1. A criterion and a method for solving the inverse problem of fracture mechanics on definition of the function of displacements of external contour points of the hub of a friction pair with regard to temperature drop in the details of friction pair is given. The found function of displacements of external contacts points of the hub provides increase of load-carrying capacity of the friction pair. Calculation for a friction pair applied to the borehole sucker-rod oil pumps was considered as an example.

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“…Such micro-or macroscopic irregularities form the rough surface. Despite the very small sizes of the irregularities, they affect the different service properties of triboconjugation [12][13][14][15]. In the operation process of friction pair, on the internal surface of the hub, on the area of contact with the plunger, there acts surface thermal source caused by external friction of the plunger against the hub's wall in the course of repeatedly reciprocating motion of the plunger.…”

Section: Problem Statementmentioning

confidence: 99%

Minimization of Stress State of a Hub of Friction Pair

Мирсалимов

Ахундова

2018

Advances in Mathematical Physics

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The function of displacements of external contour points of a friction pair hub that could provide minimization of stress state of a hub was determined on the basis of minimax criterion. The problem is to decrease stress state at that place where it is important. The rough friction surface model is used. To solve a problem of optimal design of friction unit the closed system of algebraic equations is constructed. Increase of serviceability of friction pair parts may be controlled by design-engineering methods, in particular by geometry of triboconjugation elements. Minimization of maximum circumferential stress on contact surface of friction unit is of great importance in the design stage for increasing the serviceability of friction pair. The obtained function of displacements of the hub's external contour points provides the serviceability of friction pair elements. The calculation of friction pair for oil-well sucker-rod pumps is considered as an example.

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Complex microtopography analysis in sliding friction of steel-ferodo material pair

Cited by 14 publications

References 6 publications

Sdq-Sdr Topological Map of Surface Topographies

Sdq-Sdr Topological Map of Surface Topographies

Inverse problems of damage mechanics for a hub of a friction pair

Minimization of Stress State of a Hub of Friction Pair

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