Fractal characterization of mechanical surfaces

With increase in sensitivity of measurement, infinite texture structure will be found on the engineering rough surface. Therefore, any traditional quantitative description of rough surface varies in accordance with the change of measure scale, and never touches the natural properties of surface profile. This paper applies the fractal geometry to the research on surface microtopography, gives the meaning of fractal dimension for describing the roughness of the surface, and indicates the relation between the dimension and the surface roughness.