期刊
TRIBOLOGY LETTERS
卷 69, 期 3, 页码 -出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-021-01471-5
关键词
Adhesive wear; Severe wear; Self-affine surface; Boundary element method
资金
- EPFL Lausanne
This study developed an analytical model of adhesive wear between two unlubricated rough surfaces, examining the influence of self-affinity of surface roughness and complex morphology of micro-contacts on wear particles. By considering elastic interactions between nearby micro-contacts, a wear map was constructed to describe the instantaneous wear volume.
We develop an analytical model of adhesive wear between two unlubricated rough surfaces, forming micro-contacts under normal load. The model is based on an energy balance and a crack initiation criteria. We apply the model to the problem of self-affine rough surfaces under normal load, which we solve using the boundary element method. We discuss how self-affinity of the surface roughness, and the complex morphology of the micro-contacts that emerge for a given contact pressure, challenge the definition of contact junctions. Indeed, in the context of adhesive wear, we show that elastic interactions between nearby micro-contacts can lead to wear particles whose volumes enclose the convex hull of these micro-contacts. We thereby obtain a wear map describing the instantaneous produced wear volume as a function of material properties, roughness parameters and loading conditions. Three distinct wear regimes can be identified in the wear map. In particular, the model predicts the emergence of a severe wear regime above a critical contact pressure, when interactions between micro-contacts are favored.
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