GRAPHO-ANALYTICAL METHOD FOR DETERMINING STRESSES IN THE SOIL LAYER UNDER THE ACTION OF A DIHEDRAL WEDGE

Abstract

The study of the stress distribution process in the soil layer is an important stage in the design of tillage machines, particularly tillage working elements. The experimental identification of patterns between the stress distribution zone in the soil layer and the parameters of tillage working elements is a time-consuming process. Therefore, it is recommended to conduct preliminary mathematical modeling of this process to minimize the overall number of experiments. The research purpose: development of a grapho-analytical method that can determine the pattern between the stress distribution zone in front of the dihedral wedge and its parameters. The concepts of classical and agricultural mechanics were used in the research. The methodology is based on scientific methods of cognition such as mathematical modeling, abstraction, analysis, and synthesis.

Using the equation proposed by J. Boussinesq, a grapho-analytical method was developed to determine the stresses arising in the soil layer under the influence of the dihedral wedge. This method takes into account the influence of the dihedral wedge parameters and the physical and mechanical characteristics of the soil. The proposed method can be used in the design of tillage working elements. Specifically, to justify the chisel outreach of the blade working element at the stage of theoretical research. It was found that there is a direct proportion between the length of the dihedral wedge and the total area of deformed soil. Thus, as the length of the wedge increased by 83 percent (from 0.05 to 0.30 meters), the area of deformed soil increased by 80 percent (from 0.02 to 0.10 square meters).