Physical-mathematical modeling of friction, adhesion and cohesion processes in the problem of soil stickiness

Abstract

The stickiness of soils is a huge problem in the development of earthmoving machines by working bodies, which leads to an increase in maintenance efforts, a decrease in productivity and, as a result, an increase in economic costs. The process of sticking itself has not been fully studied and is of interest from the point of view of its mathematical description, which makes it possible to reveal not only its physical nature, but also to find certain relations and dependencies when assessing the stress-strain state during the destruction of a soil mass. In the article, based on the mathematical apparatus and the energetic essence of soil destruction, the phenomenon of soil stickiness was investigated based on the adhesive-cohesive forces and friction forces arising on the surface of the working body during soil excavation. Based on the theory of modeling the physical processes occurring during soil excavation, the authors obtained dependencies that allow us to find the relationship between the normal and tangential component of stresses arising from the destruction of the soil mass. The obtained dependencies will allow us to develop technical solutions to combat the sticking of soil on the surfaces of the working bodies of earthmoving machines.