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Criteria and properties of the asperity peaks on 3D engineering surfacesKalin, Mitjan ; Pogačnik, Aljaž, 1985-In any attempt to theoretically calculate the real contact area for 3D engineering surfaces, a criterion is needed to identify the relevant asperity-peaks that carry the load in tribological ... contacts. In our recent work, we investigated how different, available 2D criteria affect the properties of the theoretically determined asperity-peaks in 2D surfaces. In this work, however, we focused on a 3D surface characterisation. The effect of different asperity-peak identification criteria on the properties of the asperity-peaks (numbers, radii and heights) is studied in the 3D domain. Several different criteria that take into account the number of neighbouring points, the distances between them (lateral resolution) and their heights were evaluated for real measured surfaces with five different surface roughnesses in the broad engineering range of arithmetic surface roughness from Sa=0.005um to Sa=0.529um. From the results it follows that all three chosen asperity-peak identification criteria (5PP-3D, 9PP-3D and 9PP-R-3D) result in reliable asperity-peak properties, and none of them can be favoured based on a theoretical evaluation only. There are, however, important differences between them. The data resolution in the x and y directions has a very important influence on the numbers, radii and heights of the asperity-peaks, and the results suggest that the data's lateral resolution, below 1um, should be used for the relevant asperity-peak identification.Source: Wear. - ISSN 0043-1648 (Vol. 308, iss. 1/2, Nov. 2013, str. 95-104)Type of material - article, component partPublish date - 2013Language - englishCOBISS.SI-ID - 13208603
Author
Kalin, Mitjan |
Pogačnik, Aljaž, 1985-
Topics
tribology |
surface topography |
identification |
3D asperity-peak |
Radii |
real contact area |
tribologija |
topografija površin |
prepoznava |
radij |
realna kontaktna površina
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Database name | Field | Year |
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Kalin, Mitjan | 14556 |
Pogačnik, Aljaž, 1985- | 33437 |
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