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Wear-coefficient analyses for polymer-gear life-time predictions : a critical appraisal of methodologiesMatkovič, Sebastjan ; Pogačnik, Aljaž, 1985- ; Kalin, MitjanPolymer gears are used in many devices due to their advantages, among other, dry-running possibilities. As part of their design, the life-time predictions for fatigue and wear are among the most ... critical and necessary for any application. In a wear life-time prediction, the wear coefficient is the key parameter. The VDI 2736 guideline considers the wear coefficients obtained from pin-on-disc tests. Due to the obvious possible differences in wear coefficients from pin-on-disc tests and actual gear tests, these data can vary considerably. Moreover, the methodology for determining wear coefficients in a real-scale gear test has several possible variations that can lead to significant differences. This study evaluates several methods of determining the wear coefficient, i.e., pin-on-disc, as well as seven methodologies based on real-scale gear tests. Two different polyacetal (POM) materials (Delrin 500P and Hostaform C9091), typical for polymer gears, were used for the pin-on-disc analyses and a re-evaluation from the literature. The Delrin 500P was additionally used in real-scale gear tests to provide a direct comparison of the wear coefficients with the selected methods. The overall conclusion is that the wear coefficient of polymers used in gear-design calculations should be obtained from real-scale gear tests. This can be concluded from empirical wear coefficient results, as well as from surface wear mechanisms analyses.Source: Wear. - ISSN 0043-1648 (Vol. 480/481, 15. Sep. 2021, str. 1-12)Type of material - article, component partPublish date - 2021Language - englishCOBISS.SI-ID - 65400067
Author
Matkovič, Sebastjan |
Pogačnik, Aljaž, 1985- |
Kalin, Mitjan
Topics
polymers |
gears |
wear coefficient |
wear |
POM (polyacetal) |
VDI 2736 |
polimeri |
zobniki |
koeficient obrabe |
poliacetali
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Matkovič, Sebastjan | 53511 |
Pogačnik, Aljaž, 1985- | 33437 |
Kalin, Mitjan | 14556 |
Source: Personal bibliographies
and: SICRIS
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