Volume-aware design of composite molds

Alderighi, Thomas; Malomo, Luigi; Giorgi, Daniela; Bickel, Bernd; Cignoni, Paolo; Pietroni, Nico

doi:10.1145/3306346.3322981

Cited by 16 publications

(11 citation statements)

References 26 publications

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“…We first compute a tetrahedralization of the object whose boundary conforms with the original surface mesh using TetGen [Si15]. Then, we propagate the surface partition inside the tetrahedralized volume, following the approach in [AMG∗19], and get a set of solid pieces. After performing a Laplacian smoothing on the interface surfaces between solid pieces, we subtract the insets to solid pieces via Boolean operations, to get the final shell pieces (Figure 7).…”

Section: Methodsmentioning

confidence: 99%

Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing

Filoscia

Alderighi

Giorgi

et al. 2020

Computer Graphics Forum

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We propose a method for the automatic segmentation of 3D objects into parts which can be individually 3D printed and then reassembled by preserving the visual quality of the final object. Our technique focuses on minimizing the surface affected by supports, decomposing the object into multiple parts whose printing orientation is automatically chosen. The segmentation reduces the visual impact on the fabricated model producing non‐planar cuts that adapt to the object shape. This is performed by solving an optimization problem that balances the effects of supports and cuts, while trying to place both in occluded regions of the object surface. To assess the practical impact of the solution, we show a number of segmented, 3D printed and reassembled objects.

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Section: Methodsmentioning

confidence: 99%

Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing

Filoscia

Alderighi

Giorgi

et al. 2020

Computer Graphics Forum

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“…Recently, computational methods for developing functional molds for complex geometry have been developed, focusing on discretization methods, geometric approximations of free-form geometries for casting, and calculating optimal demolding directions. [101][102][103][104][105] The implications of this automation opportunity are beyond the typical scenario of an unsupervised production line. Digital fabrication allows cost-effective mass customization and production, in which each piece of formwork can be unique, allowing the concrete components to respond optimally to their spatial, structural, and functional conditions.…”

Section: Automation For Mass Customizationmentioning

confidence: 99%

3D Printed Formwork for Concrete: State-of-the-Art, Opportunities, Challenges, and Applications

Jipa

Dillenburger

2022

3D Printing and Additive Manufacturing

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Concrete is the most used human-made material in the world, and it is responsible for around 8% of the total greenhouse gas emissions worldwide. Hence, efficient concrete construction methods are one of the main foci of research in architecture, civil engineering, and material science. One recent development that promises to achieve this goal is the use of digital fabrication for building components. Most investigations focus on direct extrusion 3D printing with concrete, which has already been covered in several review articles. Conversely, this article reviews a different approach, which focuses on the indirect digital fabrication of concrete through 3D printed formworks. This approach is under investigation for structural and nonstructural, as well as for onand off-site applications, with a number of projects having already been built, but a comprehensive review of 3D printed formworks has not yet been compiled to synthesize the findings. This article provides a comprehensive map of the state-of-the-art of five different 3D printing technologies used for the fabrication of formworks so far. The aim is to serve as a fundamental reference for future research, provide a basis for consistent language in this field, and support the development of construction standards. The article further discusses the new geometric possibilities with 3D printed formworks and their potential for making concrete construction more sustainable. In addition, the opportunities and challenges of 3D printed formworks are evaluated in the context of other traditional and digital fabrication tools. A synthetic classification in five functional typologies is proposed and illustrated with 30 representative case studies. Finally, the article concludes with a brief reflection on the role of 3D printing in the broader context of formwork innovation and a possible outlook for this technology.

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“…This widens the search space for valid flexible mould decompositions. To cope with this less constrained design space, approaches targeting the automatic design of flexible moulds rely either on physical simulations of the extraction process [MPBC16] or on geometric heuristics [AMG*18, AMG*19] to enforce the extractability of the mould from the cast object (Section 5 provides a detailed discussion of such approaches).…”

Section: Problem Statement and Terminologymentioning

confidence: 99%

State of the Art in Computational Mould Design

Alderighi

Malomo

Auzinger³

et al. 2022

Computer Graphics Forum

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Moulding refers to a set of manufacturing techniques in which a mould, usually a cavity or a solid frame, is used to shape a liquid or pliable material into an object of the desired shape. The popularity of moulding comes from its effectiveness, scalability and versatility in terms of employed materials. Its relevance as a fabrication process is demonstrated by the extensive literature covering different aspects related to mould design, from material flow simulation to the automation of mould geometry design. In this state-of-the-art report, we provide an extensive review of the automatic methods for the design of moulds, focusing on contributions from a geometric perspective. We classify existing mould design methods based on their computational approach and the nature of their target moulding process. We summarize the relationships between computational approaches and moulding techniques, highlighting their strengths and limitations. Finally, we discuss potential future research directions.

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Volume-aware design of composite molds

Cited by 16 publications

References 26 publications

Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing

Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing

3D Printed Formwork for Concrete: State-of-the-Art, Opportunities, Challenges, and Applications

State of the Art in Computational Mould Design

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