Design Method and Mechanical Properties of Construction 3D Printing Infill Structures Inspired by Origami Patterns (2026-02)¶

Currently, construction 3D printing technology offers innovative construction methods, yet research on printing infill structure patterns and their mechanical performance remains limited. This paper attempt to bridges that gap by introducing the relationship between four geometric primitive origami (GPO) patterns and existing construction 3D printing infill structures. On this base, a novel origami-lattice infill (OLF) pattern is also first proposed to fill the 3D printing construction component for strengthening mechanical properties. The mechanical performances of various origami-infill structures were investigated by employing the concrete damaged plasticity (CDP) model in ABAQUS numerical simulations. The simulation results show that (a) For GPO patterns, the compressive and bending performances could be adjusted by changing infill structural type and parameters, but the compressive specific energy absorption (SEAc) remains poor. (b) For novel OLF patterns, the compressive and bending performance could also be changed by different structural parameters, which show anisotropic compression properties and comparatively better SEAc. And the its z-direction specific strength of OLF pattern with 135°-20mm could reach 23.11 MPa. Through normalized mechanical comparisons, the novel OLF pattern in z-direction could improve the mechanical properties compared with GPO patterns. Eventually, the construction components infilled by OLF pattern are printed by the construction 3D printer, which demonstrate application feasibility for construction 3D printing technology through successful printing experiments and compression tests.