About the article
V.V. IZMAILOV,, A.F. GUSEV
The influence of the parameters of discrete contact of technical surfaces on one of the contact resistance components ‒ constriction resistance ‒ is studied. The dominant factors determining the electrical and thermal conductivity of the rough surfaces contact are the number of contact areas of roughness peaks and their average size. Based on analytical and numerical (computer) models of contact joints, the influence of nominal contact pressure on these factors is analyzed. The adequacy of the analytical and numerical models to the real characteristics of the contact connection has been verified experimentally. It is shown that the real range of possible changes in the average size of the contact areas is very small, and the dominant factor, the targeted change of which can be used to reduce the contact resistance, remains the number of contact areas of the roughness peaks. An example of such a targeted change in this contact parameter is given.
contact of rough surfaces, contact area, number and size of contact areas, contact resistance, constriction resistance, roughness.