Scuffing as Evaluated From the Viewpoint of Surface Roughness and Friction Energy

Jeng Haur Horng; Jen Fin Lin; Ke Yang Li

doi:10.1115/1.2831590

Scuffing as Evaluated From the Viewpoint of Surface Roughness and Friction Energy

Jeng Haur Horng, Jen Fin Lin, Ke Yang Li

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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 (P_f = fWV_s) 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 (A_t) is used to obtain the true friction power intensity (P_tfi = P_f/A_t). A new scuffing failure model (P_tfi · σ^-0.317, where a 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 σ is always associated with the high P_tfi is value just before scuffing.

Original language	English
Pages (from-to)	669-675
Number of pages	7
Journal	Journal of Tribology
Volume	118
Issue number	3
DOIs	https://doi.org/10.1115/1.2831590
Publication status	Published - 1996 Jul

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1115/1.2831590

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abstract = "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, where a 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 σ is always associated with the high Ptfi is value just before scuffing.",

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AB - 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, where a 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 σ is always associated with the high Ptfi is value just before scuffing.

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Scuffing as Evaluated From the Viewpoint of Surface Roughness and Friction Energy

Abstract

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