Topological damping materials and methods thereof
| DWPI Title: Metamaterial used in aerospace, transportation, defense, and sports equipment, has cell walls provided for defining inner volume in which cell walls are configured to be elastic walls capable of being displaced along normal direction |
| Abstract: The present invention features a metamaterial including a plurality of unit cells, in which each unit cell includes two interacting members to dissipate energy. Also provided herein are assemblies including such metamaterials and methods of manufacture. |
| Use: Metamaterial used in aerospace, transportation, defense, and sports equipment, transportation, biomedical, athletic equipment, defense and energy. |
| Advantage: The topology has phenomena colloquially known as smaller is stronger, by fabricating the mesoscale features of the topological structure at sub-micrometer dimensions. The homogenization of unit cell response enables the computational efficiency necessary to design large-scale structures that maximize mechanical performance. The designed metamaterial controls and redistributes the energy by, e.g., shifting the resonant response spectrum and phonon transmission when exposed to a mechanical energy impact. The elasticity of a lattice material is improved by using struts or other structures to bend, tense, compress, or buckle when exposed to an applied load. The analytic models provides computationally efficient method to estimate expected scaling laws, perform sensitivity analysis, and evaluate potential tradeoffs in dimensions/material properties. The heat released as broadband energy dissipation is harnessed to improve a material's damping performance through topology. |
| Novelty: The metamaterial has several cell walls defining an inner volume. The cell walls are configured to be elastic walls capable of being displaced along a normal direction. A first element (611) is mounted within the inner volume and is provided with a first planar surface. A second element (612) is mounted within the inner volume and is provided with a second planar surface. An interacting joint is provided with a sliding movement between the first and second planar surfaces upon displacement of the elastic walls along the normal direction that provides energy dissipation by way of friction. |
| Filed: 3/19/2019 |
| Application Number: US16358335A |
| Tech ID: SD 14580.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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