Physicomechanical properties of a model material in the form of a cube with the topology of triply periodic minimal surfaces of the gyroid type

The results of the investigation of physicomechanical properties of the material produced from polylactide with the topology of triply periodic minimal surfaces have been presented. The samples were obtained in the form of a cube, which consisted of repeating elements with the minimum possible area, by the fused deposition method on an FDM 3D printer. When comparing the experimental deformation curves, it has been found that the obtained curves qualitatively differ from each other under loading at different direction with respect to the construction axis of the product, since the same material behaves as both fragile and plastic. A difference in magnitude of the specific yield limit ($\sigma_{\operatorname{sp}}$, МPа сm$^{3}$/g) was established depending on the load direction: 7.6, if it is perpendicular to the construction axis; 11.3, if it is along the construction axis; 27.6, if it is along the construction axis with plates on two sides. The performed work is preparatory in order to develop periodic structures based on ceramics, which can be used as protective layers of equipment.