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The test procedure for characterizing the tribological behavior of lubricants and materials for the system “piston ring/cylinder liner” outside of engines is now operational and validated. The test parameters presented in this paper ( F N =50 N; v =0.3 m/s, s =24 km) may act only as an indicator...
Most of the machine parts can be produced using several manufacturing methods, such as forging, machining, casting or welding. The type of manufacturing method may be selected with respect to production costs of the alternatives for individual parts. In the presented study, an experimental...
According to the Stokes microcontinuum theorem and Christensen's stochastic model, the main objective of this paper is to theoretically predict the combined influences of couple stresses and surface roughness on the lubrication performance of journal‐bearing systems. To take account of the...
High‐speed gas‐lubricated porous journal bearings up to 200,000 rpm are analyzed numerically. The effects of rotation speed, bearing eccentricity, permeability and thickness of the porous wall on bearing load capacity and attitude angle are investigated. The adequate initial conditions are...
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