Stiffness Optimization Through a Modified Greedy Algorithm

Due to the 3D printing techniques, it is possible to create and design components with soft and rigid combinations of materials with different elastic properties which may satisfy multiple material requirements. A soft (blue) and a rigid (purple) material with moduli of elasticity in a ratio 1:10 can be irmkj et printed together following an initial pattern. The objective function was formulated as to maximize the effective stiffness on both in-plane directions. Finite element analyses were performed by using the PyAnsys software under an MIT License in a domain with 16 Q8 elements which represents by symmetry a representative volume element (RVE). The objective function to be maximized can also reduce the anisotropy of the printed topology. We proved that the formulation of three objective functions affects the results obtained with a Greedy algorithm. (C) 2022 The Authors. Published by Elsevier B.V.