Anisotropic mechanical properties of diamond lattice composites structures

By taking diamond lattice grid as an example, mechanical properties of the composites lattice structures with different width ratio of struts were studied in this paper. Both stiffness anisotropy and strength anisotropy were analyzed based on the equivalent continuum method. Anisotropic mechanical properties of the diamond lattice grids vary with different width of strut rows in different orientation, and higher specific strength and stiffness may be obtained by this way. The offset of failure lines in strength envelop with different width ratio was also illustrated. The strength envelop would shrink when taking the Euler buckling of struts into consideration. Based on the anisotropy of the lattice, a primary and simplified way was proposed to optimize the lattice cylinder composites structures to maximize its axial compression strength.