Research of Surface Roughness Anisotropy

Abstract

The authors of the paper have investigated surfaces with irregular roughness for the purpose of determination of roughness spacing parameters perpendicularly to machining traces -RSm 1 and parallel to them -RSm 2 , as well as checking the relationship between the surface anisotropy coefficient c and surface aspect ratio Str from the standard LVS EN ISO 25178-2. Surface roughness measurement experiments with 11 surfaces show that measuring equipment values of mean spacing of profile irregularities in the longitudinal direction are not reliable due to the divergence of surface mean plane and roughness profile mean line. After the additional calculations it was stated that parameter Str can be used for determination of parameter RSm 2 and roughness anisotropy evaluation for grinded, polished, friction surfaces and other surfaces with similar characteristics.

Influence of Feed Motion on Surface Friction of AISI 1045 Steel Machined by a Fine-Grinding Process

“…Regarding the theoretical approaches, the mathematical expressions of friction force, or friction coefficient based on material properties, typical geometric parameters [5,6] were formulated. Besides, in the experimental approaches, the effect of typical geometric parameters of the surface on friction is also conducted [4,12]. The typical geometric parameters of the surface change according to the feed motion directions [12] and are directly affected by friction, which is the anisotropy of surface friction.…”

“…Besides, in the experimental approaches, the effect of typical geometric parameters of the surface on friction is also conducted [4,12]. The typical geometric parameters of the surface change according to the feed motion directions [12] and are directly affected by friction, which is the anisotropy of surface friction. The anisotropy of surface friction causes the occurrence of randomly horizontal vibrations as well as the wear of contacted surfaces.…”

Finite Element Modelling of a Pair of Flexible Elements Contact Preloaded and Externally Loaded with an Arbitrary Force

“…In contact joints, the elements with contact surfaces that have previously undergone some mechanical treatment are most often joined [8]. Such surfaces do not adhere to each other over the entire nominal contact surface, but only on a small part of it, in separate randomly arranged micro-areas [37,47,48].…”