The effect of filtering processes on surface roughness parameters and their correlation with the measured friction, Part II: porcelain tiles

It is known that surface roughness affects friction, but it is unclear whic h surface characteristics are better correlated with friction. Moreover, th e filter process used in a surface roughness measurement affects the values of surface parameters and, therefore, affects surface representations. The effect of filter selection on the surface parameters of unglazed quarry ti les and their correlation with the measured friction was investigated in Pa rt I. Same analyses were applied to the surface parameters of porcelain til es and the dynamic friction coefficient measured with a pin-on-disk tester. Similar to Part I, the results indicated that some parameters, such as S-m , were significantly affected by both the filter type and band width, while some other parameters, such as a,, were significantly affected by the band width. The filter type 2CR PC could generate surface parameters that had s lightly higher linear correlation coefficients with friction than the other two filter types, but the differences in correlation coefficients due to d ifferent filter selections were significant for the surface parameters R-p and R-pm. The filter band width of 1000 is not recommended. The surface par ameter Delta(a) had a very small location dependence and a very high correl ation coefficient with friction. (C) 2000 Elsevier Science Ltd. All rights reserved.