Simulation of non-inverted soil tillage using the discrete element method
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Abstract
In the present work, a simulation model is developed by the discrete element method (DEM) for tillage without soil prism inversion with a paratill type implement. The virtual soil block was generated with macro-particles that respond to the simplified geometry of soil fragments with attributes and physical-mechanical properties of a cohesive soil of the vertisol type. For the virtual model of the implement, the design and resistive study of the paratill is carried out using the finite element method (FEM). The simulation of the interaction between the implement and the soil block made it possible to determine the movement and velocity patterns of the particles, as well as the magnitude of the draft force, and the results showed that the design of the implement fulfills the tensile requirements that allow it to support the tillage activity without permanent deformations. On the other hand, the dynamics of the tillage process allowed establishing the final position of the particles, as well as the specific pressures between them and with the implement. Finally, the average value of the draft force was obtained by simulation, being in correspondence with the soil cohesion and the design of the tillage implement. The analytical validation, by means of the classical mechanics equations, showed adequate results of the draft force.
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