A Simulation Model for Determining the Mechanical Properties of Rapeseed using the Discrete Element Method

作者：Tamas Kornel^*; Foeldesi Bernat; Radics Janos Peter; Jori Istvan J; Fenyvesi Laszlo

来源：Periodica Polytechnica: Civil Engineering , 2015, 59(4): 575-582.

DOI：10.3311/PPci.8173

• rapeseed
• material model
• discrete element method
• DEM
• compression
• direct shear box test
• calibration

This paper describes the mechanical modeling of rapeseed using the 3D Discrete Element Method (DEM). We investigated rapeseeds as a set of granular material points using a linear elastic material model with Coulomb friction and cohesive bonds. The parameters of the model were determined through physical and mechanical investigations. The mechanical properties were validated against actual measurement results using a single-axis compression box and a direct shear box. The investigations yielded the following micro-mechanical parameters: normal particle stiffness (Kn): 437 kN/m; particle shear stiffness (Ks): 100 kN/m; particle-to-particle friction coefficient (mu) 0.5; particle-to-wall friction coefficient (mu) 0.2; wall normal stiffness (Kn): 1311 kN/m; wall shear stiffness (Ks): 300 kN/m; local damping coefficient (gamma): 0.7. The results proved that the DEM method is suitable for simulating the macro-mechanical behavior of rapeseed for the pressing process.

• 出版日期2015