Draught force prediction from soil relative density and relative water content for a non-winged chisel blade using finite element modelling. (April 2022)

• Record Type: Journal Article
• Authors: Arefi, Mohadeseh; Karparvarfard, Seyed Hossein; Azimi-Nejadian, Hadi; Naderi-Boldaji, Mojtaba
• Is Part Of: Journal of terramechanics. Volume 100(2022)
• Page Start: 73
• Page End: 80
• Publication Date: 2022-04
• Subjects: Soil-tool interaction -- FEM -- Draught force; Trafficability -- Periodicals; Praticabilité (Routes) -- Périodiques; Trafficability; Periodicals; 629.222
• DOI: 10.1016/j.jterra.2022.01.001
• Languages: English
• ISSNs: 0022-4898

Abstract

Highlights: A model was developed to predict the draught force of a non-winged chisel blade. Model is a function of soil physical properties, tillage depth and speed. Model validation indicated that it could be helpful to predict the draught force. Abstract: This study aims to develop a model for prediction of the draught force of a new narrow non-winged chisel blade as a function of tillage depth (d), forward speed (v), soil relative water content ( w rel ), and soil relative density ( ρ rel ) based on combination of statistical and finite element (FE) models. The soil-chisel blade interaction was simulated for various combinations of relative density and relative water content of a sandy loam soil at three levels of forward speed (i.e., 2, 3, and 5 km h −1 ) and three levels of tillage depths (i.e., 0.15, 0.2, and 0.25 m) using finite element method. The draught force of each simulation was obtained and used to develop a statistical model. A simple model with an adjusted coefficient of determination ( R adj 2 ) of 0.81 and the root mean square error (RMSE) of 0.3 kN was proposed for draught force. This model was tested for a set of experimental data obtained in a clay loam soil. The fitted regression line to the data showed that the predicted draught forces lie within bounds of ±6% of the measured values with a coefficient of determination of 0.96. In general, the results of this study showed that using relative density and relative water content, a prediction model could be developed for draught force to work across soil textures. Further studies in a wider range of soil textures are suggested to evaluate the model for the tillage tool.