Design and simulation of additive manufactured structures of three component composite material

A.Yu. Zobacheva, A.S. Nemov, A.I. Borovkov, A.D. Novokshenov M.V. Khovaiko, N.A. Ermolenko (St. Petersburg Polytechnic University)

CHALLENGE -  Lattice structures have become widespread in many areas. Their obvious advantage is the light weight and significant cost savings of a material. Application of unidirectional composite materials allows preserve the exceptional strength properties of composites in construction regardless of the loading direction. For this reason, the lattice composite structures are actively used in the aerospace industry. The goal of this work is the study of the property change of lattice structures of three component composite materials depending on their parameters, as well as the determination of optimal configurations of these structures.​ 

SOLUTION - The software of finite element analysis ANSYS and the software modeFRONTIER for solving the tasks of criterion and multi-criteria optimization were used. As an example of lattice structure, we considered construction of a plate type. ​The following set of optimization parameters is assumed: number of inclined ribs, number of horizontal/vertical ribs, inclination angle of the ribs to the horizontal axis in the plane of the plate, inclination angle of the diagonal ribs to the vertical axis perpendicular to the plate.​ The target functions are: weight of the structure, maximum deflection.​

BENEFITS - The parametric optimization of the lattice structure plate type is carried out. The dependencies of the deflection and the first natural frequency on the plate mass are obtained, and a set of solutions optimal for the given criteria is determined. It is found that the minimum deflection is achieved at the inclination angle the ribs equal to 45⁰ at a constant mass. There are strong grounds for believing that the variation of the inclination angle of the ribs to the plate plane is irrational.