Modeling soil-bulldozer blade interaction using the discrete element method (DEM) |
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| Institution: | 1. Department of Agricultural and Biosystems Engineering, Iowa State University, 2331 Elings Hall, Ames, IA, USA;2. USDA-ARS National Soil Dynamics Laboratory, Auburn, AL, USA;3. Department of Civil, Construction and Environmental Engineering and Department of Agricultural and Biosystems Engineering, Iowa State University, USA;1. Biosystems Engineering Department, College of Agriculture, Shiraz University, Shiraz, Iran;2. Department of Mechanical Engineering of Biosystems, Faculty of Agriculture, Shahrekord University, Shahrekord 88186-34141, Iran;1. Komatsu MIRAI Construction Equipment Cooperative Research Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan;2. Department of Mechanical Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan;3. Development Division, Komatsu Ltd., 1200 Manda, Hiratsuka, Kanagawa 254-8567, Japan;1. College of Mechanical and Electric Engineering, Northwest A&F University, Yangling 712100, China;2. Shaanxi Engineering Research Center for Agricultural Equipment, Yangling 712100, China;1. Department of Mechanical Engineering of Biosystems, Faculty of Agriculture, Shahrekord University, PO Box 115, Shahrekord 88186-34141, Iran;2. Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran;3. Department of Agricultural Machinery Engineering, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran;4. Department of Agricultural Machinery and Mechanization Research, Agricultural Engineering Research Institute (AERI), Karaj, Iran;5. John Deere, Moline Technology Innovation Center, Moline, IL 61265-8010, United States;6. Agroscope, Department of Natural Resources & Agriculture, Reckenholzstrasse 191, CH-8046 Zurich, Switzerland;7. Swedish University of Agricultural Sciences, Department of Soil & Environment, Box 7014, SE-75007 Uppsala, Sweden;1. Fraunhofer Institute for Industrial Mathematics, Fraunhofer–Platz 1, 67663 Kaiserslautern, Germany;2. Division of Soil Mechanics and Foundation Engineering, Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany;3. Institute of Engineering and Computational Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany;4. Volvo Construction Equipment, Max-Planck-Straße 1, 54329 Konz, Germany |
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| Abstract: | Limited studies have been conducted to establish scaling relationships of soil reaction forces and length scales of bulldozer blades using the Discrete Element Method (DEM) technique. With a DEM-based similitude scaling law, performance of industry-scale blades can be predicted at reduced simulation efforts provided a calibrated and validated DEM soil model is developed. DEM material properties were developed to match soil cone penetration testing. The objectives of the study were to develop a DEM soil model for Norfolk sandy loam soil, establish a scaled relationship of soil reaction forces to bulldozer blade length scales (n = 0.24, n = 0.14, n = 0.10, and n = 0.05), and validate the DEM-predicted soil reaction forces on the scaled bulldozer blades to the Norfolk sandy loam soil bin data. Using 3D-scanned and reconstructed DEM soil aggregate shapes, Design of Experiment (DOE) of soil cone penetration testing was used to develop a soil model and a soil-bulldozer blade simulation. A power fit best approximated the relationship between the DEM-predicted soil horizontal forces and the bulldozer blade length scale (n) (R2 = 0.9976). DEM prediction of soil horizontal forces on the bulldozer blades explained the Norfolk sandy loam soil data with a linear regression fit (R2 = 0.9965 and slope = 0.9634). |
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| Keywords: | Discrete element method Similitude Soil horizontal force Soil vertical force |
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