Simulation of the tillage process using LIGGGHTS based on the Discrete Element Method (DEM)
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Abstract
In the design of mine-clearing equipment, consideration of soil resistance and the prediction of soil mechanical behavior are crucial to the overall efficiency of the demining process. Theoretical calculation of soil resistance using Reece's equation, combined with the study of soil mechanics through the Discrete Element Method (DEM), provides valuable insights.
The results from Reece's theoretical model and the DEM simulations—focusing on the actual interaction forces between soil particles and the cutting blade at the microscale—indicate that the resistance force obtained from DEM varies with cutting depth. This variation is characterized by fluctuations resulting from intermittent contact and pushing behavior between soil particles. Consequently, the DEM-derived forces are significantly higher than those predicted by the theoretical model. Nonetheless, the DEM simulation successfully captures the soil-cutting behavior and illustrates the detailed soil flow through the blade, offering essential data for optimizing blade design to achieve greater efficiency.
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References
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