A multiscale-approach for wear prediction in journal bearing systems – from wearing-in towards steady-state wear
| Autor: | Florian König, Achraf Ouald Chaib, Georg Jacobs, Christopher Sous |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Steady state
Materials science Bearing (mechanical) Scale (ratio) Bearing wear Numerical analysis 02 engineering and technology Surfaces and Interfaces Surface finish Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films law.invention 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law Materials Chemistry Critical assessment 0210 nano-technology Asperity (materials science) |
| Zdroj: | Wear. :1203-1211 |
| ISSN: | 0043-1648 |
| Popis: | The present study aims to predict the wear in journal bearings during steady-state operation in the mixed-lubrication regime starting with a critical assessment of commonly used wear laws. A novel numerical method is introduced that calculates journal bearing wear on macroscopic and asperity contact scale. For validation of the numerical method, the friction and wear behavior was studied on a special test-rig for journal bearings. Both experimental and numerical results show an initial period of high friction and wear. After the first minutes of operation reduced friction can be observed. The simulations clarify, that this is caused by bearing wear on asperity roughness scale. By considering the reduced asperity interaction due to wearing-in in the calculation of contact conditions a higher accuracy of wear prediction is achieved. |
| Databáze: | OpenAIRE |
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