Tailored energy dissipation with viscoelastic architectured materials

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A family of architectured materials (AMs) is studied for viscous damping. A computational methodology is employed to capture the energetic behavior of the AM. While the presented approach is generic for any symmetry class of AMs, the selected Representative Volume Elements (RVEs) have cubic symmetry. In particular, the set of truss structures including simple cubic, body-centered cubic and face-centered cubic and the set of Triply Periodic Minimal Surfaces (TPMS) including Gyroid, Diamond and Schoen IWP are analyzed. First, a homogenization method is implemented to extract the effective viscoelastic behavior of the chosen AMs, verified based on the correspondence principle. Second, the energetic behavior including the storage and loss factors are extracted for different anisotropy directions of the lattices. And finally, in order to showcase the application of such tailored energy response under a class of loadings, the energy dissipation of the homogenized models of the different RVEs are elaborated under hydrostatic, tensile and shear modes. Interestingly, for the same base material and the same relative density, the different AMs show different energy dissipation behavior in hydrostatic, tensile and shear modes. This opens up an excellent library of materials for a tailored energy dissipation.