Mechanical aspects of tillage theory

The soil is a dispersed medium with a wide range of physical and mechanical properties, which is able to per-ceive and transmit the mechanical forces of the deformer (wedge). In the tillage theory, various calculation schemes and models of the soil environment are used, which are based on the provisions of continuum mechanics. Considering that the soil is an object of mechanical processing, various models are considered in continuum mechanics: bulk, solid, elastic, plastic, deformable body, including soil mechanics. When developing the tillage theory, the correctness and applicability of the chosen continuous medium model are fundamental. Any solved problem in the mechanics of media is associated with the need to establish appropriate state equations describing the state of the medium, considering the mechanical laws of interaction of various bodies. Moreover, based on the tillage task, which consists in studying the process of destruction (crumbling) of the treated layer and assessing the stress-strain state (SSS) of the soil medium, the task of choosing the appropriate strength theory is added. All these tasks depend on the physical and mechanical properties of the soil.