With advances in computer science, numerical methods like FEM, DEM, and ANN have been employed to study soil-tillage tool interaction, evolving from 2D to 3D analyses for complex tool shapes. FEM was supposed the soil as continuous materials with different behavior models. Thus, the main objective of this work is to develop a simulation model for predicting draft and vertical force and consequently power requirements affecting on tillage tools as a function of soil, tool and operational conditions parameters using finite element method. In order to study the interaction between soil and tool, a three-dimensional model was performed using Abaqus Explicit Software. The soil was molded with linear forms of Drucker-Pager model, while the tool was considered as a rigid body. The effect of soil bulk density 1.30, 1.35 and 1.41 Mg/m3 at moisture content 10%, tool speed 3, 5 and 8 km/h and operational depth 0.05, 0.075 and 0.1 m for shovel – sweep – winged chisel tool on the draft and vertical forces were investigated. Triaxial tests were carried out using clay loam soil to determine the shear strength parameters such as soil cohesion and internal friction angle. The results found that the highest draft and vertical force values were recorded with high tillage depths and high tool speeds. The highest value of draft force was 69% for shovel chisel tool and the highest value of vertical force was 52% for sweep chisel tool when tillage depth increased from 0.05 to 0.1 m at different levels of soil and operation parameters. Results indicated that finite element method allows researchers to optimize tool designs to reduce energy consumption and improve soil handling. |
