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Effect of moisture content of corn on discrete element modeling input parameters estimation
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2018 ASABE Annual International Meeting 1801249.(doi:10.13031/aim.201801249)
Authors: Mohammad Mousaviraad, Mehari Z Tekeste
Keywords: Cohesion, Corn, Discrete Element Method, Moisture Content, Sensitivity analysis
The Hertz-Mindlin with JKR cohesion contact model was used to simulate the frictional and cohesive behavior of corn-corn and corn-wall interactions. The effect of moisture content on the dynamic behavior of grains at loose and confined states was investigated. The static Angle of Repose (AOR) and direct shear test were assumed to represent the loose and confined states, respectively. Parametric sensitivity studies were conducted on both experimental and DEM simulation which showed a statistically significant effect of MC on the response variables from bucket AOR and direct shear tests. After the optimal DEM input parameter values matching the angle of repose and direct shear bulk responses were obtained, the MC effect on DEM input parameters were studied and concluded that increase in corn MC causes increase in corn‘s DEM Young modulus and corn-corn static friction coefficient while decreasing the corn-corn rolling friction.(Download PDF) (Export to EndNotes)