Wr. Chang et S. Matz, The effect of filtering processes on surface roughness parameters and their correlation with the measured friction, Part I: quarry tiles, SAF SCI, 36(1), 2000, pp. 19-33
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 surface roughness measurement affects the values o
f surface parameters and, therefore, affects surface representations. The e
ffect of filter selection on the surface parameters and their correlation w
ith the measured friction was investigated in this study. Surface roughness
on unglazed quarry tiles was measured. Friction was measured with two comm
ercially available slipmeters. The results indicated that some parameters,
such as R-sk, were significantly affected by the filter type, while some ot
her parameters, such as Delta(a), were significantly affected by the band w
idth. The filter type 2CR PC could generate surface parameters that had sli
ghtly higher linear correlation coefficients with friction than two other f
ilter types, ISO 2CR and Gaussian, and the filter band width of 1000 is not
recommended. The surface parameter R-pk had a very high correlation with f
riction, but it was highly location dependent and somewhat ambiguous in how
it was generated. The surface parameter R-pm had a very small location dep
endence and a very high correlation coefficient. Therefore, the surface par
ameter R-pm was a better choice for an indicator of surface friction. (C) 2
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