Optimal design of two lattice materials and their effective properties

In this paper, metallic tetrahedral and pyramidal core lattice materials are optimally designed. Effective properties of these two cores are presented, and compared with other metallic light weight structures. Results show that the tetrahedral and pyramidal lattice materials are more weight efficient than other light weight metallic materials. Comparisons of the metallic lattice materials with their composite counterparts in terms of stiffness are also presented. Results indicate that composite lattice materials which combine higher effective stiffness and lower densities are preferred.