Dynamic Load Mitigation of 3D-printed Triply Periodic Minimal Surface Structures

Three types of triply periodic minimal surface (TPMS) structures are chosen to investigate the quasi-static and dynamic compressive behaviors in this paper. All the TPMS lattices (Primitive, Gyroid, IWP) have the same relative density of 37.5%, and the samples are fabricated by the 3D printing of selective laser melting technique using AlSi10Mg powder. The energy absorption performance and dynamic load mitigation of the 3D printed TPMS structures under three different impact velocities are compared, and the corresponding engineering strain rates are 143 s −1, 286 s −1, and 571 s −1, respectively. The results of numerical simulation indicate that the IWP structure has the highest specific energy absorption (SEA) and plateau stress, followed by the Gyroid structure, and finally the Primitive structure. The SEA of Primitive and Gyroid structures increases with the impact velocity and decreases for IWP structure.