Indentation tests and rolling simulations of a compliant wheel on soil at different consistencies |
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| Institution: | 1. Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Republic of Korea;2. Department of Smart Agriculture Systems, Chungnam National University, Daejeon 34134, Republic of Korea;3. Smart Agricultural Machinery R&D Group, Korea Institute of Industrial Technology (KITECH), Gimje 54325, Republic of Korea;4. Reliability Test Team, TYM ICT Co. Ltd., Gongju 32530, Republic of Korea;5. Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju 61186, Republic of Korea;6. Department of Bio-Industrial Machinery Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;7. Department of Bio-Mechatronic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea;1. Mendel University in Brno, Department of Engineering and Automobile Transport, Zemědělská 1, 613 00 Brno, Czech Republic;2. ZETOR TRACTORS a.s., Trnkova 111, 628 00 Brno, Czech Republic;1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410072, China;2. College of Systems Engineering, National University of Defense Technology, Changsha 410072, China;1. Department of Automotive, Mechanical and Manufacturing Engineering, University of Ontario Institute of Technology, ON L1H 7K4, Canada;2. Volvo Group Trucks Technology, Vehicle Analysis, Dept. BF72920, Göteborg AB4S 405 08, Sweden;1. Advanced Vehicle Dynamics Laboratory (AVDL), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States;2. Center for Tire Research (CenTiRe), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States |
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| Abstract: | The investigation presented addresses the response of a compliant wheel in interaction with deformable soil dependent on the water content, and accordingly on soil consistency. Two fine soils are considered. The basic soil properties and the soil shear strength are obtained from routine tests. A non-pneumatic Tweel in full size is tested in a loading device against a rigid base and against soil placed in a container in order to assess its stiffness and the compressional behavior of the soil, respectively. The measured pressure sinkage curves are then utilized in conjunction with a standard explicit FEM code to calibrate a hyperelastic model for the Tweel and an elasto-plastic constitutive model for the soil. Soil-tire interface strength is obtained from shear tests on a flat tire section embedded in soil. The numerical model is then applied to investigate how the water content affects the global response of the tire-soil system under different scenarios of free rolling, braking and driving. The methodology followed, complemented by appropriate soil testing, can be used as guide for the implementation of more elaborate models. |
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| Keywords: | Non-pneumatic Tweel Indentation tests Pressure sinkage curves Soil tests Moisture effects Soil model parametrization FEM Numerical rolling simulations |
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