A Study on Boundary Modeling of Three-Dimensional Discrete Element Method Based on Pro/ENGINEER

Abstract

This paper presents a new method that use the library function offered by Pro/TOOLKIT and on account of Visual C++ development platform to achieve the recognition of Pro/ENGINEER solid model of mechanical components and extraction of geometry information. Motion attribute is set according to requirements, and analytical mode of three-dimensional discrete element method is built, therefore, Pro/ENGINEER software and the performance analysis software of three-dimensional discrete element method developed autonomously are integrated. A kind of new method and new tool is offered to three-dimensional discrete element method performance analysis and optimization design, and three-dimensional discrete element method belongs to relevant mechanical components contacted and acted with granular materials. What’s more, the correctness and effectiveness of boundary modeling method of three-dimensional discrete element method and developed software are tested and verified through real examples.

Applications of Discrete Element Method in the Research of Agricultural Machinery: A Review

“…There were three common approaches to determining crop seed profile: direct determining, slice modeling, and 3D-scanning. The direct determining method means determine the length, width, and thickness of crop seeds with a micrometer or vernier caliper directly, and calculating the equivalent diameter and degree of sphericity [61][62][63]. Based on the difference of seed profile and size, a model can be established by classification [64][65][66].…”

“…The static and rolling friction coefficients between crop seeds and contact materials were usually determined with a slope sliding method or self-made coefficient determining apparatus [64]; collision coefficients of restitution were calibrated with seed dropping tests and collision tests [74,75]. Using a static compression test, stiffness coefficient, elasticity modulus, Poisson's ratio, and shear modulus were calibrated [62,72,93]. Some other studies calibrated the damping coefficient with a uniaxial loading test [94][95][96].…”