Tribological Studies of Dispersed Media

The aim of the work is to develop methods for studying tribological characteristics of dispersed media required for designing molding equipment and tools. The article contains a historical review of the development of tribological studies of dispersed media, and provides links to the original sources of the main ideas. The contribution of Soviet-period researchers and Belarusian researchers, including scientists from Vitebsk State Technological University, is briefly described. The design of a specialized tribometer is developed and patented, tribological studies of plasticized and pure powders are performed. It is shown that the Coulomb-Amonton law is unsuitable for irreversibly compressible materials. A nonlinear law of friction based on three stress-invariant tribological characteristics has been proposed. The article describes how these coefficients can be measured using a tribometer. The results of such studies for a number of compacted dispersed media are presented. The developed methods for studying tribological characteristics of dispersed media have been repeatedly used in the actual design of molding equipment and tools and can be recommended for practical application.