Energy Absorption Characteristics of 3D Lattice Structure Filled with Periodic Inner Core Based on 3D Printing

The 3D lattice structure is a porous lightweight periodic structure with high specific stiffness and strength and has good energy absorption characteristics. In this study, flexible resin was used as the research material, and a microporous lattice structure with a periodic inner core was designed and fabricated using digital light processing 3D printing technology by vertical and horizontal printing, respectively. Quasi-static axial compression experiments were performed to study the mechanical properties and energy absorption properties of the porous lattice structure. At the same time, the cell body structure of an existing x-type unit was studied, and the ratio of the stress platform of the structure with different diameters and angle parameters was studied. In this study, after a combination of theoretical analysis, ANSYS finite element analysis and experimental verification, a certain angle of control was obtained, and the x-type porous lattice structure showed excellent energy absorption characteristics. The research results suggest broad applicability, and the structure can be used as an in vitro 3D scaffold material in skin tissue engineering component technology and can also be used as a high-quality cushioning or damping material in vibration and energy absorption applications.