Scuffing as Evaluated From the Viewpoint of Surface Roughness and Friction Energy
作者： Jeng Haur Horng , Jen Fin Lin , Ke Yang Li
DOI: 10.1115/1.2831590
关键词: Asperity (materials science) 、 Geometry 、 Surface finish 、 Materials science 、 Root mean square 、 Transverse plane 、 Surface roughness 、 Energy (signal processing) 、 Forensic engineering 、 Contact area 、 Lubrication 、 Mechanical engineering 、 Mechanics of Materials 、 Surfaces, Coatings and Films 、 Surfaces and Interfaces
摘要: The surface scuffing occurring in line-contact lubrication is related to the roller’s roughness pattern and asperity height. For surfaces with same contact asperity height, the magnitudes of friction power (Pf = fWVs) relevant to various roughness patterns are found to have the same sequence as the critical local temperatures. Instead of using the nominal contact area, the real contact area (At) is used to obtain the true friction power intensity (Ptfi = Pf/At). A new scuffing failure model (Ptfi · σ−0.317 = C, where σ denote rms roughness) shows that the scuffing resistance of surfaces with transverse roughness pattern is higher than that of surfaces with longitudinal and oblique patterns. For certain roughness patterns, a high root mean square roughness height a is always associated with the high Ptfi value just before scuffing.
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