Obtención de la distribución de estructuras de impresión de mínimo tiempo para la fabricación aditiva
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Asociación Argentina de Mecánica Computacional
Abstract
La impresión 3D por deposición fundida (FDM) es una técnica de manufactura aditiva en
donde un objeto es creado mediante la superposición de capas sucesivas de material. Esta tecnología se
caracteriza por poder fabricar piezas con geometrías complejas y su principal desventaja es el elevado
tiempo de impresión. Además, existe una relación inversa entre el tiempo de impresión (principal factor
influyente en el costo de producción) y la rigidez final de la pieza, por lo que la solución para cada caso
de aplicación es una decisión técnica-económica. En base a esto, este trabajo propone una estrategia
para determinar la óptima distribución de las estructuras de impresión que permita obtener la mayor
rigidez de la pieza posible con el menor tiempo de impresión. Para obtener dicha distribución se utiliza
un algoritmo de optimización topológica multimaterial, en donde la representación geométrica del
dominio se realiza mediante funciones level-set guiadas por la derivada topológica del problema. Se
presentan los conceptos fundamentales del método con el desarrollo de la derivada topológica del tiempo
de impresión, ejemplos numéricos de aplicación e implementación del método en casos reales de FDM.
Fused Deposition Modeling (FDM) is an additive manufacturing technique in which an object is created by depositing material layer by layer. This technology is characterized by its capability to manufacture parts with complex geometries and its main disadvantage is long printing times. Furthermore, there is an inverse relation between the printing time (main influencing factor of the production cost) and the stiffness of the final part, thus, the solution to different application cases is a technical-economic decision. Based on this, the present work proposes a strategy to determine the optimal distribution of the printing structures that allows obtaining the highest possible stiffness of the part with the shortest printing time. To get this distribution a multiple material topology optimization algorithm is used, where the geometric description of the material domain is performed using level-set functions guided by the topological derivative of the problem. Fundamental concepts of the method, with the development of the topological derivative of the printing time are presented. Also, several numerical application examples and implementation of the method in real cases of FDM are shown.
Fused Deposition Modeling (FDM) is an additive manufacturing technique in which an object is created by depositing material layer by layer. This technology is characterized by its capability to manufacture parts with complex geometries and its main disadvantage is long printing times. Furthermore, there is an inverse relation between the printing time (main influencing factor of the production cost) and the stiffness of the final part, thus, the solution to different application cases is a technical-economic decision. Based on this, the present work proposes a strategy to determine the optimal distribution of the printing structures that allows obtaining the highest possible stiffness of the part with the shortest printing time. To get this distribution a multiple material topology optimization algorithm is used, where the geometric description of the material domain is performed using level-set functions guided by the topological derivative of the problem. Fundamental concepts of the method, with the development of the topological derivative of the printing time are presented. Also, several numerical application examples and implementation of the method in real cases of FDM are shown.
Description
Keywords
Impresión 3D, Optimización topológica (optimización estructural), Mínimo tiempo de impresión
Citation
XXXVIII Congreso Argentino de Mecánica Computacional
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