Cross-like lattices with tailorable mechanical properties

Abstract

Here we propose a new 3D structure with cubic unit cells constructed by six 2D cross-like lattices. Applying Finite element analysis (FEA), we find that the mechanical properties of such 3D lattices can be geometrically tuned without considering different material attributes. The topology and volume fraction are changed by varying the deformation angle and strut diameter-length ratio, respectively, which both affect the overall stiffness. This is demonstrated by the experiments with 3D printed acrylate resin specimens. Interestingly, the proposed lattices also show a potential auxetic property and high porosity (>90%). Such lattices can be used to create new materials with lightweight and tunable mechanical properties in tissue engineering, civil engineering, and aerospace industry.