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Simulation of the soil mechanical behavior in the soil tillage tool interface

Abstract:

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 pbkp_redict 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 pbkp_rediction 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%.