Abstract
We designed, fabricated, and experimentally validated an architected mechanical metamaterial vibration shielding while ensuring high effective stiffness with low density. The structure is made of a periodic succession of octet truss units with alternating circular strut diameters. The octet truss endows the meta-structure with a high effective stiffness and a low effective density, while alternating the units with different struts radii enables the opening of a wide band-gap for elastic waves. Samples were 3D printed and experimentally validated using a shaker and accelerometer. Unidirectional compression test was also performed to characterize the mechanical properties of the metamaterial. The results are in good agreement with the numerical prediction.
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