Topology optimization applied an threshing separation rotor component

Resumo

Threshing separation rotors are extensive used as extensively in a combine harvester as a flow separator
that includes at least one rotary axis. Among the components of the rotor, the finger is one of the main ones because
it is responsible for separating the grains and the straw. Nonetheless, the optimization is little explored which
makes it a component of low structural performance. This work aims to develop a topology optimization using a
finite element (FE) model in order to reduce the mass of the finger. In the first step, the model is performed
considering the pre-torque of the screw and the bending load that the straw generates on the finger. Besides, the
normal and tangential contacts are considered between the components. Then, the topology optimization is
performed by Solid Isotropic Material with Penalization (SIMP) method. The objective function is defined as
minimizing the volume of the finger subject to von Misses stress and displacement constraints. The topology
optimization results present that the volume reduced achieve 84% in comparation with original model.