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Wear due to fatigue initiation
Citation Link: https://doi.org/10.15480/882.14881
Publikationstyp
Journal Article
Date Issued
2025-07-01
Sprache
English
Author(s)
TORE-DOI
Journal
Volume
207
Article Number
110592
Citation
Tribology International 207: 110592 (2025)
Publisher DOI
Scopus ID
Publisher
Elsevier
ISSN
0301679X
Persson and coauthors have recently proposed an extension of the Rabinowicz idea for fatigue wear at different scales of roughness, where Paris’ crack growth law is applied to ”potential” wear particles. However, Persson's theory suffers from the fact that initial size of defects is unknown and fatigue life is not entirely due to propagation, so we investigate a different formulation, where a law for initiation of cracks is used for a specimen with initial roughness of engineering interest. We find that results (in particular dependence on amplitude of roughness, and on friction coefficient) are qualitatively similar to the original Persson and coworkers’ theory, but may differ substantially quantitatively. As the assumption of a constant fatigue threshold may be incorrect for short cracks, both fatigue limit and fatigue threshold are made dependent of crack size, using the Murakami formulation as one of the possible alternatives. This makes wear rate be sensitive to the fine scale details of the roughness spectrum, which has an effect on increasing wear rate and small particles emission. The model seems to have qualitative trends in agreement with experiments, but obviously wear is a very complex phenomenon and many factors may be not captured.
Subjects
Fatigue wear | Friction | Plasticity | Roughness | Wear
DDC Class
621.8: Machine Engineering
Publication version
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1-s2.0-S0301679X25000878-main.pdf
Type
Main Article
Size
1008.15 KB
Format
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