Bézier-based metamaterials: synthesis, mechanics and additive manufacturing
The design of mechanical metamaterials often uses lattice arrangements being benefited from the increase in Additive Manufacturing technologies available. Such design freedom allows the fabrication of lattice arrangements with com-plex curved geometries. Here we propose a whole family of novel lattic...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | México |
| Recursos: | Centro de Investigación y Asistencia en Tecnología |
| Repositorio: | Repositorio Institucional de CIATEQ |
| Idioma: | inglés |
| OAI Identifier: | oai:ciateq.repositorioinstitucional.mx:1020/487 |
| Acesso em linha: | http://ciateq.repositorioinstitucional.mx/jspui/handle/1020/487 |
| Access Level: | acceso abierto |
| Palavra-chave: | info:eu-repo/classification/Palabra clave del autor/Metamaterials info:eu-repo/classification/Palabra clave del autor/Apparent mechanical properties info:eu-repo/classification/Palabra clave del autor/Structure-property relationship info:eu-repo/classification/Palabra clave del autor/Cubic Bézier curves info:eu-repo/classification/Palabra clave del autor/Lattice info:eu-repo/classification/Palabra clave del autor/Additive manufacturing info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/33 info:eu-repo/classification/cti/3310 info:eu-repo/classification/cti/331006 |
| Resumo: | The design of mechanical metamaterials often uses lattice arrangements being benefited from the increase in Additive Manufacturing technologies available. Such design freedom allows the fabrication of lattice arrangements with com-plex curved geometries. Here we propose a whole family of novel lattice matematerials parametrized using cubic Bézier curves. The methodology presented permits the generation of unit cells with different degrees of curvature based on the location of the Bézier control points along a spiral. The apparent stiffness of these structures was charac-terized using finite element analysis and compression tests on additively manufactured samples using stereolithography. The mechanical properties of spiral based cubic Bézier metamaterials were related to the location of thecontrol points,curvature,etc.Itwasfoundthatthe apparent stiffness decreases proportionally to the cubic root of the distance between the control point and the predefined origin of the coordinate system. Due to symmetry con-ditions, the slope continuity in the curves conforming the unit cells is fulfilled and the origin of the coordinate system used coincides with the center of the unit cells. The procedure presented for the synthesis of metamaterials enables the generation of structures with customized mechanical properties by adjusting the geometry of the unit cells. © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (creativecommons.org/licenses/by-nc-nd/4.0/). |
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