| Abstract Scope |
Additively manufactured lattice structures are promising for lightweight and energy-absorbing applications, but their behavior under shear remains insufficiently understood. In this study, LPBF 316L lattice structures with BCC, FCC, and OCT geometries were investigated under both compression and shear. Although all structures were designed with the same relative density, their mechanical responses strongly depended on loading mode. Under compression, FCC showed the highest energy absorption, whereas BCC exhibited the lowest. In contrast, under shear, BCC demonstrated the best performance, while FCC was the weakest. Finite element analysis indicated that these contrasting trends arise from geometry-dependent deformation mechanisms: BCC is mainly governed by bending-dominated node rotation, whereas FCC and OCT deform primarily through axial strut loading. These results highlight the importance of matching lattice architecture to service loading conditions in the design of reliable AM lattice components. |