On the mechanical behaviour of additively manufactured metamaterials under dynamic conditions

High-energy absorption and light-weightiness are two critical properties for impact protection in the aerospace sector. In past, use of periodic honeycomb structures or random porous metallic foams were preferred route to obtain a good specific-energy performance. recent years, additive manufacturing has increased design freedom creating new generation reticulated materials: metamaterials lattice materials. The internal geometries these can be tuned superior optimal properties, e.g., energyabsorption density. However, mechanics materials under need understood with purpose mechanical optimisation, computational models validated. this work, we present experimental compressive behaviour, at room temperature, Ti6Al4V static dynamic conditions. quasi-static tests performed by using universal testing machine while conducted 480s -1 split-Hopkinson bar. all cases, deformation process was filmed analyse failure. Finally, finiteelement simulations done, employing Johnson-Cook model, describe response alloy. able reflect failure characteristics each metamaterial but not macroscopic due differences between volume fraction.