Combined effect of surface roughness and pressure-dependent viscosity over couple-stress squeeze film lubrication between circular stepped plates
| Autor: | B T Raju, K R Vasanth, B. N. Hanumagowda, J Santhosh Kumar |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Couple stress Mechanical Engineering Squeeze film 02 engineering and technology Surfaces and Interfaces Surface finish Pressure dependent 021001 nanoscience & nanotechnology Reynolds equation Surfaces Coatings and Films Physics::Fluid Dynamics Viscosity 020303 mechanical engineering & transports 0203 mechanical engineering Surface roughness Lubrication Composite material 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 232:525-534 |
| ISSN: | 2041-305X 1350-6501 |
| Popis: | In this paper, the effect of surface roughness and pressure-dependent viscosity over couple-stresses squeeze film lubrication between circular stepped plates is studied. The modified average Reynolds equation is derived for the one-dimensional roughness structures, namely the radial roughness pattern and azimuthal roughness pattern. Modified equations for the nondimensional pressure, load-carrying capacity, and nondimensional squeeze film time are obtained. Also, the obtained results of our study for some special cases are compared with the previously published smooth surface case, and the results are found to be in very good agreement. It is observed that, one-dimensional azimuthal (radial) roughness pattern on the rough circular stepped plate increases (decreases) the load-carrying capacity and the squeeze film time as compared to the smooth case. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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