The cultivators are agricultural machinery used for: loosening the soil before plantation, elimination of weeds or soil aeration after the crops started growing.In this present paper, because of the complexity of the system soil – agricultural machine, we will use an analytical model which respects the geometry of the active element, realising a prediction of the forces which result at the dislocation of the soil.In the pre-processing stage, the objective was to design a three dimensional model in CATIA V5, in keeping with the geometry of the active element, represented by the Cartesian coordinates, together with a portion of the soil rendered as a parallelepiped shape. The second stage followed the introduction of conditions both for the working part, through the fastening of the plowshare frame, the moving direction and velocity, and for the soil, through the action of the cohesion and internal friction forces. In the third stage, called the processing stage, there is the simulation of the process of soil displacement done in real conditions, for various degrees of refinement of the discretization network in finite elements. Using the Explicit Dynamics module of the Ansys software, which allows the study of the working organ behaviour and in real conditions the normal stress, deformation at different speeds and working depths are analysed.

cultivators, working organ, normal stress, deformation

environmental engineering

Presentation: poster