|
Abstract:
Fractal
dimension and scale coefficient of surface profiles are calculated using
structure function method. Studies show that there is the imperfection
of fractal dimension or scale coefficient in characterizing rough
surfaces. In consideration of this case, combing profile fractal
dimension and scale coefficient puts a new fractal parameter called
characteristic roughness forth. Its definition and calculation
expression are given. Friction and wear tests were conducted by using
thrust type tester and surface topographies were measured in the same
place of the test specimen at different wear time. It’s found that it is
not only more sensitive but also more regular for characteristic
roughness to characterize rough surface during running-in process than
fractal dimension or scale coefficient to do.
Key words:
Friction
Wear Running-in Surface topography Fractal
Characteristic roughness
CLC No: TH117.1
国家自然科学基金和江苏省“333”人才基金资助项目. Received 20000626, received in revised form
20000912
|