Consideration of anisotropy of the mechanical characteristics of short fibers reinforced composite materials in power structures topological optimization

A technique for consideration of anisotropy of the mechanical characteristics of short fibers reinforced composite materials in power structures topological optimization is presented. The results of bracket topological optimization in isotropic and orthotropic cases are compared. Polyamide-6 reinforced with 50% short glass fibers was used as the material. The influence of the mechanical characteristics anisotropy the on the results of topological optimization is estimated. It is shown that the orthotropic nature of the material leads to the orientation of the structural elements along the direction of maximum material stiffness. Based on the results of topological optimization, taking into account technological limitations, three-dimensional geometric models of the bracket are constructed. A verification calculation was carried out taking into account the nonlinearity and anisotropy of the material and the reinforcement structure predicted by calculation of plate-blank molding. The calculations are confirmed experimentally by testing brackets made of Armamide PA6 CB 50-1 material on a universal servo-hydraulic machine MTS 793.