Andrzej Dzierwa

Rzeszów University of Technology

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Paweł Pawlus

Rzeszów University of Technology

Lidia Gałda

Rzeszów University of Technology

Agnieszka Lenart

Rzeszów University

Rafał Reizer

Rzeszów University

Waldemar Koszela

Rzeszów University of Technology

Sławomir Woś

Rzeszów University of Technology

Jarosław Sęp

Rzeszów University of Technology

WŻ

Wiesław Żelasko

Rzeszów University of Technology

Wiesław Graboń

Rzeszów University of Technology

Michał Wieczorowski

Poznań University of Technology

Cooperative Institutions

Rzeszów University of Technology

Rzeszów University

Cherkasy State Technological University

AGH University of Krakow

Poznań University of Technology

ORCID

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

State Higher Vocational School in Krosno

University of Basrah

Kazimierz Pułaski University of Technology and Humanities in Radom

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Badania możliwości poprawy przez kulowanie właściwości zmęczeniowych elementów chromowanych

Archiwum Technologii Maszyn i Automatyzacji (2007)

Andrzej Dzierwa Mieczysław Korzynski

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Citations (3)

The Effect of Oil Pockets Shape and Distribution on Seizure Resistance in Lubricated Sliding

Tribology Letters (2009)

Lidia Gałda Andrzej Dzierwa Jarosław Sęp Paweł Pawlus

Burnishing (metal)

10.1007/s11249-009-9522-7

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Citations (43)

Wpływ kieszeni smarowych na powierzchniach ślizgowych na zużycie ścierne

Tribologia - Finnish Journal of Tribology (2010)

Waldemar Koszela Lidia Gałda Andrzej Dzierwa Jarosław Sęp Paweł Pawlus

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Citations (2)

Problems of surface topography with oil pockets analysis

Journal of Physics Conference Series (2011)

Wiesław Graboń Paweł Pawlus Lidia Gałda Andrzej Dzierwa Przemysław Podulka

The present paper presents method of description of two-process surfaces of random (load-bearing plateau structure) and deterministic (oil pockets) character on the basis of the probabilistic approach of material ratio curve. Examples of this method usage for textured surfaces are shown. The other application of material ratio curve for estimation of pit-area ratio of textured surfaces is discussed. Distortion of surface topography with oil pockets measurement by improper selection of areal reference plane is taken into consideration.

Distortion (music)

10.1088/1742-6596/311/1/012023

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Citations (15)

The study on abrasive wear of grooved journal bearings

Wear (2017)

Jarosław Sęp Leszek Tomczewski Lidia Gałda Andrzej Dzierwa

Groove (engineering)

Plain bearing

Intensity

10.1016/j.wear.2017.02.034

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Citations (16)

The effect of stitching method on the change of surface topography parameters

Mechanik (2016)

Andrzej Dzierwa

Wpływ metody "sklejania" powierzchni

Image stitching

10.17814/mechanik.2016.5-6.81

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Citations (0)

The effect of steel disc surface texture in contact with ceramic ball on friction and wear in dry fretting

Surface Topography Metrology and Properties (2018)

Agnieszka Lenart Paweł Pawlus Andrzej Dzierwa

Ceramics are used in a wide range of applications including bearings. Ceramic—metal contacts are of great potential for the future. The purpose of this paper is to study the effect of a surface topography of a steel disc in contact with ceramic ball on friction and wear under dry gross fretting regime. Experiments were carried out using an Optimol SRV5 tribological tester under dry friction conditions in the gross fretting regime. The number of cycles was set to 18000, temperature was 30 °C, the stroke was set to 0.1 mm, the normal load was 45 N. A ceramic ball from tungsten carbide (WC) material of 10 mm diameter was put in contact with steel discs of various surface textures with hardness of 47 and 59 HRC. It was found that the average coefficient of friction and volumetric wear of the tribological system were inversely proportional to disc roughness height. These dependencies were stronger for higher disc hardness.

Fretting Wear

Ball (mathematics)

Tungsten Carbide

Coefficient of friction

Dry friction

10.1088/2051-672x/aac1a2

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Citations (20)

Wpływ pneumokulkowania na wytrzymałość zmęczeniową elementów z powłokami chromowymi

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika (2004)

Andrzej Dzierwa

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Citations (3)

Effect of triangular oil pockets on friction reduction

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology (2021)

Sławomir Woś Waldemar Koszela Andrzej Dzierwa Paweł Pawlus

The effect of the apex angle of triangular oil pockets created on a disc surface on friction was studied. Experiments were carried out using an Optimol SRV5 tribotester equipped with a pin-on-disc module under unidirectional lubricated sliding. Both the sample and counter sample was made of steel of 45 Hardness Rockwell C (HRC) hardness. Only 1 ml of oil was put to the inlet side of the contact area at the beginning of each test. All textured surfaces had the same pit-area ratio and an average depth of dimples. Oil pockets were positioned in the spiral array. It was found that the effect of the apex angle of triangular dimples on friction reduction was important. When the normal load was lower, the smallest coefficient of friction was achieved for the sliding pair with a disc apex angle of 60°. Under a larger normal load, a higher apex angle corresponded to a higher coefficient of friction.

Dimple

Apex (geometry)

Inclination angle

10.1177/13506501211044623

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Citations (1)

Przyczyna zatarcia tłoków podczas badania niezawodności silnika spalinowego

Tribologia : tarcie, zużycie, smarowanie (2014)

Paweł Pawlus J. Michalski Andrzej Dzierwa

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