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Descripción
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| Initially intended for Rapid Prototyping, Additive Manufacturing technologies are increasingly being adapted to functional component production [1]. Its application in architecture has been quickly growing [2], [3] since the public release of patents the most popular AM technique, Fused Deposition Modelling (FDM) [4], and since the development of several large-scale automated production techniques [5], [6]. The process of FDM is based on the principle of stacking increasingly in height layer upon layer of a given fluid material, typically thermoplastic, deposited through a numerically controlled mechanism. Following a complex toolpath is easily achieved through the numerically controlled system, so that a non- standard virtual model can be cost-efficiently produced by approximating and depositing material in the perimeter. Translating the virtual model into a stacked set of toolpaths called ?slicing? where, for purpose of rigidity, the interior of the model is infilled with a constant geometrical pattern. Recent studies in architecture and large scale production of structural components exhibit among the main challenges for future development the time required for fabrication [7], adaptation of large scale systems of extrusion and numerical control for materials susceptible of deposition such as thermoplastics and semi-liquid pastes [8], [9], and topological optimization [10] with correct simulation of anisotropic mechanical properties [11]. The Finite Element Analysis 4o CONGRESO INTERNACIONAL DE INNOVACIÓN TECNOLÓGICA EN EDIFICACIÓN CITE 2019 OPTIMIZED ADDITIVE MANUFACTURING BUILDING COMPONENTS influenced infill design and the optimization aspects of slicing have been significantly overlooked, represents an area of opportunity to reduce production time, reduce waste and better control the mechanical behavior of final product [12], [13]. The optimization of geometries for FDM is critical to harness the potential of AM architectural production. This research assesses computational workflows based on the structuring data in isostatic clouds [14] that incorporate simulation feedback loops in the design of functional components by internally differentiating [15] the geometry and material composition specifically tailoring a piece for a given application [10]. This leads to improved performance while potentially reducing, fabrication time, material use, and therefore, environmental impact [16]. The proposed method uses results attained from Finite Element Analysis (FEA) to engineer anisotropic building components by discretely determining infill geometries. In order to produce bespoke patterns, an algorithm for structuring FEM data is required. The processing of results in structured indexes linked to the digital element [17], [18] allows to internally engineer the composition and architectural behavior of functional pieces (density, stiffness, strength, fidelity, energy absorption) [19] based on the simulation values [10], [14]. The mechanical properties of large scale components are significantly determined by form, the case studies particularly focus on augmenting the stiffness of infills of given models through optimization of infill design and through superficial ornamentation, therefore maintain form fidelity, by re-distributing material in such way that displacement is reduced. The contribution of this research lies in the creation and corroboration of a computational workflow tested on thermoplastic FDM components to assess the generalizability of the design method of engineering infill structures, the identification of several geometrical constraints due to limitations in deposition techniques and to present the results of mechanical performance tests of different AM based designs case studies to advance production automation. | |
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Internacional
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Si |
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Nombre congreso
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4o Congreso Internacional de Innovación Tecnológica en edificación |
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Tipo de participación
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960 |
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Lugar del congreso
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Revisores
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Si |
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ISBN o ISSN
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000-00-0000-000-0 |
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DOI
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Fecha inicio congreso
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25/03/2019 |
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Fecha fin congreso
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04/04/2019 |
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Desde la página
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52 |
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Hasta la página
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57 |
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Título de las actas
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4o Congreso Internacional de Innovación Tecnológica en edificación |