Abstract
In the paper, we developed a discrete element model of adhesive interaction of materials with taking into account the “cold welding” effect. Based on this model, we carried out a detailed analysis of the factors controlling regimes of adhesive wear for elastic-plastic materials with non-ideal plasticity. We proposed an empirical criterion of transition from “breakaway” to “grinding” regime of wear. The extended form of the given criterion takes into account the dependence of material strength on hydrostatic pressure.
Highlights
Wear of surfaces under the condition of tangential contact occurs due to the presence of asperities of various scales
We investigated the influence of mechanical parameters of material on the regime of wear of interacting asperities
In order to study the mentioned phenomenon in a more detail, we have carried out a series of numerical calculations with use of the initially set (“reference”) values of mechanical parameters of the material (, E, y, H, a=1) but different values of tensile strength t
Summary
Wear of surfaces under the condition of tangential contact occurs due to the presence of asperities of various scales. It was shown that adhesive wear can develop in two ways: 1) formation and growth of wear particles or 2) plastic deformation of nano- and microcontacts This and many other works do not fully answer the question about the generality of the obtained regularities and the influence of the magnitude of the macroscopic characteristics of material on the conditions for the implementation of a particular wear mode. These unsolved problems determine the ever-increasing interest in studying the factors that control adhesive wear. We analyze the influence of the material parameters determining the plasticity and strength on the condition of wear rate change from low-wear to the high-wear regime
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