In this research, the anisotropy of mechanical properties of triply periodic minimal porous structures has been investigated. Twelve samples of Schwarz primitive, diamond and gyroid structures have been designed and these samples have been modeled at angles of 0, 30 and 60 degrees as well as in the direction of the main diameter. The modeling process has been carried out using mathematical functions and scripting in the MATLAB environment and the models have been designed in computer-aided design software. Subsequently, these models have been manufactured using the fused deposition modeling additive manufacturing method. The manufactured samples have been subjected to quasi-static compression tests at a speed of 1.5 mm/min accordance with the ASTM D695 standard and their force-displacement data have been extracted. The results of these tests include the analysis of force-displacement diagrams, absorbed energy, stiffness and yield force, which have been used to investigate the plastic behavior and energy absorption capacity of the structures under quasi-static loading. This research studies the effect of anisotropy on the plastic behavior and energy absorption of Schwarz primitive, diamond, and gyroid structures and shows that changing the load orientation and geometry of porous structures can change their mechanical properties and performance under real loading conditions. The obtained results can be effective in designing porous structures with optimal mechanical properties for various applications, especially in the fields of structural engineering, energy, and composite materials
Torabi et al. (Mon,) studied this question.