Abstract
Hierarchical truss topology of octahedron-of-octahedra is adopted to construct metamaterials using a snap-fit route. Hybrid material concept is utilized for lattice construction using carbon fiber reinforced polymer (CFRP) out-of-plane trusses and Ti-6Al-4V in-plane trusses. Analytical models are developed for hierarchical structures’ stiffnesses and strengths, allowing for failure map construction. Compressive properties of hybrid hierarchical structures are assessed experimentally and shown to be consistent with model estimations. The proposed metamaterial exhibits competitive response to numerous existing cellular solids, demonstrate its potential for light-weighting load-supporting applications.
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