Lattices are special material structures that are widely used in modern biomedical, construc-tion and other industries. Research has shown that different cells constituting the lattices also have different effects on mechanical and thermal properties of the final product. Latti-ces can be made from a variety of materials, but in practice polymers are predominantly used. Several industrial processes are available for the production of lattices, including 3D printing - Fused Deposition Modelling (FDM), witch was also used in our research. It in-volves applying thermoplastic polymers layer by layer to a surface. The product depends on several parameters, which need to be precisely defined in advance. In present study, a three-point bending experiment of selected Polylactic Acid (PLA) samples was carried out, focusing on honeycomb and kogame lattices. The influence of density and cell type of grids on the mechanical response of samples under bending stress was investigated. Mechanical tests showed large differences in response of PLA depending on lattice struc-ture with higher cell densities resulting in an improvement in certain mechanical properties. Kogame lattices were found to exhibit excellent stiffness, comparable to solid samples, but a brittle structure. Honeycomb lattices on the other hand, have excellent deflection and bending moment transmission, but also lower tensile strength.
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