Em. Kopalinsky et Plb. Oxley, EXPLAINING THE MECHANICS OF METALLIC SLIDING FRICTION AND WEAR IN TERMS OF SLIPLINE FIELD MODELS OF ASPERITY DEFORMATION, Wear, 190(2), 1995, pp. 145-154
It is shown that the force which opposes the sliding of a hard relativ
ely smooth surface over a softer surface can be explained as the force
needed to push waves of plastically deformed material along the soft
surface ahead of asperities on the hard surface. For rougher surfaces
and/or poorer lubrication it is shown how the wave can be torn off or
material removed by a chip formation process and wear particles formed
. Coefficients of friction predicted from the corresponding asperity d
eformation models are shown to give good agreement with experimental r
esults. For smooth well lubricated surfaces the wear of the softer sur
face is shown to occur as a result of the progressive damage to this s
urface brought about by the repeated passage of waves across it. Equat
ions for predicting wear are derived from the asperity deformation mod
els and a comparison made between predicted and experimental wear resu
lts. The paper ends by considering possible future trends in research
into the mechanics of friction and wear.