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Surface topography features such as lay, isotropy, pits and troughs are present in many engineering surfaces. The influence of some features, such as pits and troughs, on functional performance is still not fully understood. Moreover, the influence of pits and troughs on current surface topography characterisation procedures is not clear, and should be studied before more comprehensive research on the functional properties of surface features can be carried out. This paper summarises a range of surface topography features encountered in practical engineering surfaces and determines their significance in characterising 2-D and 3-D surface topography. A comparison of the significance of the surface features with sampling conditions, such as sampling interval and sampling size, in characterisation is given. The analysis results in the paper give a clear statement about the significance of the surface features on surface characterisation. Moreover, the paper demonstrates that using 3-D topographic analysis it is possible to measure, identify, and discriminate between different surface features. This discrimination allows subsequent filtering of features to suit functional analysis requirements.

Additional information

Authors: DONG W P, University of Birmingham, School of Manufacturing and Mechanical Engineering (GB);SULLIVAN P J, University of Birmingham, School of Manufacturing and Mechanical Engineering (GB)
Bibliographic Reference: Paper presented: 3rd ASPE Annual Meeting, Los Angeles (US), November 1992
Availability: Available from (1) as Paper EN 36922 ORA
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