Quantifying vegetation biomass impacts on vehicle mobility |
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| Affiliation: | 1. Department of Pharmacology, Toxicology, & Neuroscience, Louisiana State University Health Sciences Center, Shreveport, LA, USA;2. Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX, USA;3. Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA;1. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA;2. Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, USA;1. Terramechanics, Multibody, and Vehicle Systems (TMVS) Laboratory, Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, United States;2. Vehicle Dynamics Group (VDG), Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria 0002, South Africa;1. BAE Systems Platforms and Services, 6331 San Ignacio Ave, San Jose, CA 95119, United States;2. U.S. Army TARDEC, 6501 E. 11 Mile Rd, Warren, MI 48397, United States;3. Alion Science and Technology, U.S. Army TARDEC, 6501 E. 11 Mile Rd, Warren, MI 48397, United States;1. Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, USA;2. USDA-ARS National Soil Dynamics Laboratory, Auburn, AL, USA |
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| Abstract: | Soil impacts on vehicle mobility are well known; however, most data are for bare soil or the type and amount of vegetation is not documented. This study summarizes results from experiments to quantify the effect of above ground and below ground vegetation biomass on vehicle performance. Soil–vegetation combinations of three soils and three grasses were used. The vegetation was tested at various growth stages and was also subjected to stressors such as trafficking, burning, and cutting. Vegetation measurements included above ground (leaves and shoots) and below ground (root) biomass weights, lengths, diameters and surface area parameters. The soils were characterized for size distribution, moisture, density and terrain strength for each test condition. Vehicle traction and motion resistance were measured for each soil–grass combination using the CRREL Instrumented Vehicle. Results showed an increase in net traction biomass in sandy soils. For clay soils above ground biomass generally increased resistance while increased root diameter clearly decreased resistance. This study represents the first measurements quantifying the impacts of specific biomass parameters on vehicle mobility. The results will serve to guide new experimental methods, improve datasets, and develop physics-based models for years to come. |
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| Keywords: | Grass Roots Trafficability Terrain Traction Motion resistance Soil strength Rolling resistance |
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