Simulation of the soil mechanical behavior in the soil tillage tool interface
Keywords:soil, implements, tillage, mechanical soil properties, simulation
Starting from the development that has reached the computational means in the last decades, the application of the numeric methods in the simulation of the interaction soil tillage-tool, has won in acceptance. As previous step, to the simulation of this phenomenon becomes necessary the definition of the models that predict with more accuracy the soil mechanical behavior. Taking into account these aspects the objective of present work is, to simulate the soil mechanical behavior in the soil-tillage tool interface by means of the finite element method. Starting from the employment of a model that is based on frictional approaches, with the inclusion of the adherence and the establishment of a tension of slip limit, as penalty to restrict the relative displacement between both surfaces. The models were implemented in the computational tool ABAQUS 6.4, starting from that which the soil-metal relative displacement was simulated. The results evidenced the validity of the model implemented to simulate the soil mechanical response in the soil-tool interface. The errors in the prediction of the soil stress oscillated from 1,45 to 5,45%, for the case of the soil vertical deformations it varied among 2,22 to 3,57%.
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