Wyniki wyszukiwania - BazTech

1

Abrasive wear resistance of matrix composites carbon fiber reinforced polymers

Olejniczak Klaudia, Napiórkowski Jerzy

Technical Sciences / University of Warmia and Mazury in Olsztyn

|

2022

|

nr 25(1)

139--147

EN

The paper presents the results of the abrasive wear resistance test of composites based on polymers reinforced with carbon fibers. Two types of fiber composites obtained from a yacht manufacturer were used for the tests. The tests were carried out using the ball-cratering method without abrasive suspension. On the basis of the specific wear rate Kc, better tribological properties of the polyester matrix reinforced with glass fabric were observed compared to the polyester matrix reinforced with a glass emulsion mat. The composite material reinforced with glass cloth was characterized by smaller crater diameters, which may cause plastic deformation due to the low hardness of the material.

2

Volumetric wear characteristics as a result of the tribological interaction between the soil with working parts cultivator's and plough's

Vrublevskyi Oleksandr, Napiórkowski Jerzy, Olejniczak Klaudia, Gonera Jarosław

Eksploatacja i Niezawodność

|

2022

|

Vol. 24, no. 4

707--718

EN

This paper is concerned with the possibility of applying modern non-contact methods for assessing the wear as a result of tribological interaction between working bodies and the soil. An original method for wear testing using the test space discretization based on the 3D scanning technology was employed. A localized volumetric wear coefficient was proposed, allowing for wear analysis and improving the accuracy of the Holm-Archard model. The coefficient of local volumetric wear shows the influence of the nominal shape and the slip trajectory of the abrasive particle along the elementary surface on the intensity of wear. At local volumetric wear coefficient > 0.3, this factor determines the intensity of surface wear. Volumetric wear characteristics are the basis for prediction of wear consequences for different materials and techniques of reinforcement of working surfaces, subject to intensive wear in abrasive soil mass. The reliability of the study is confirmed by the comparison with the mass method for wear assessment and the results of the application of the proposed method for different conditions of abrasive wear of operating parts.

3

Effect of PE–LD and PE–HD as Modifiers of Elastomers Used in Mobile Tracks on Their Tribological Wear

Napiórkowski Jerzy, Olejniczak Klaudia

Tribologia

|

2019

|

nr 3

89--95

EN

This paper presents a study of PE–LD and PE–HD as modifiers of elastomers used in mobile tracks on their tribological wear. The experiment was conducted at a “rotating bowl” test stand in three types of soil mass: light, medium, and heavy soil. Based on measurements of mass wear of the tested materials, relative resistance to wear was determined. It was found that an elastomer containing chemically modified polyethylene (PE–HD) was more resistant to wear than an elastomer containing low-density polyethylene (PE–LD). Using a microscope, the condition of the material surfaces following tribological tests was analysed.

PL

W pracy przedstawiono badania PE–LD i PE–HD jako modyfikatorów elastomerów stosowanych w gąsienicach jezdnych na ich zużywanie tribologiczne. Badania przeprowadzono na stanowisku „wirującej misy” w trzech rodzajach masy glebowej: gleba lekka, średnia oraz ciężka. Na podstawie pomiarów zużycia masowego badanych materiałów wyznaczono względną odporność na zużycie. Stwierdzono, że elastomer zawierający polietylen modyfikowany chemicznie (PE–HD) jest bardziej odporny na ścieranie w stosunku do elastomeru o zawartości polietylenu o niskiej gęstości (PE–LD). Za pomocą mikroskopu dokonano analizy stanu powierzchni materiałów po badaniach tribologicznych.