Cumincad : CUMINCAD Papers : Search Results

CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id	ascaad2016_043
id	ascaad2016_043
authors	Alacam, Sema; Orkan. Z. Güzelci
year	2016
title	Computational Interpretations of 2D Muqarnas Projections in 3D Form Finding
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 421-430
summary	In the scope of this study, we developed an algorithm to generate new 3D geometry (interpretation) of a given or generated planar projection of a muqarnas in a digital 3D modelling software (Rhinoceros), its visual scripting environment (VSE) Grasshopper and also the Python programming language. Differing from traditional methods, asymmetrical form alternatives are examined. In other words, 2D projections of muqarnas were only used as an initial geometrical pattern for generative form finding explorations. This study can be considered an attempt to explore new relations, rules and vocabulary through algorithmic form finding experiments derived from 2D muqarnas projections.
series	ASCAAD
email
last changed	2017/05/25 13:33

_id	ascaad2016_008
id	ascaad2016_008
authors	Armstrong, Logan; Guy Gardner and Christina James
year	2016
title	Evolutionary Solar Architecture - Generative Solar Design Through Soft Forms and Rigid Logics
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 55-64
summary	This paper describes the development of a workflow for the production of a net zero off-grid research cabin. The workflow deploys a number of affiliated parametric software packages as a form finding tool for the exterior envelope of this structure, with a focus on passive solar design as a generative formal driver. The design was required to incorporate the spatial and programmatic needs of the users in a compact, barrier free, net zero building. Simultaneously, the research question asked the designers to harness the potential of digital design in the consideration of future fabrication techniques, in order to optimize the building’s performance and the speed and quality of assembly once the project moves into construction. Parameters considered include solar exposure, external surface area, cost, fabrication, functionality, and aesthetic criteria. This project was developed by a multidisciplinary team of graduate students at the University of Calgary.
series	ASCAAD
email
last changed	2017/05/25 13:13

_id	caadria2016_415
id	caadria2016_415
authors	Crolla, Kristof and Adam Fingrut
year	2016
title	Protocol of Error: The design and construction of a bending-active gridshell from natural bamboo
doi	https://doi.org/10.52842/conf.caadria.2016.415
source	Living Systems and Micro-Utopias: Towards Continuous Designing, Proceedings of the 21st International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2016) / Melbourne 30 March–2 April 2016, pp. 415-424
summary	This paper advocates alternative methods to overcome the impossibility of realising ‘perfect’ digital designs. It discusses Hong Kong’s 2015 ‘ZCB Bamboo Pavilion’ as a methodological case study for the design and construction of architecture from unprocessed natu- ral bamboo. The paper critically evaluates protocols set up to deal with errors resulting from precise digital design systems merging with inconsistent natural resources and onsite craftsmanship. The paper starts with the geometric and tectonic description of the project, illus- trating a complex and restrictive construction context. Bamboo’s unique growth pattern, structural build-up and suitability as a bending- active material are discussed and Cantonese bamboo scaffolding craftsmanship is addressed as a starting point for the project. The pa- per covers protocols, construction drawings and assembly methods developed to allow for the incorporation and of large building toler- ances and dimensional variation of bamboo. The final as-built 3d scanned structure is compared with the original digital model. The pa- per concludes by discussing the necessity of computational architec- tural design to proactively operate within a field of real-world inde- terminacy, to focus on the development of protocols that deal with imperfections, and to redirect design from the virtual world towards the latent opportunities of the physical.
keywords	Bamboo; bending-active gridshells; physics simulation; form-finding; indeterminacy
series	CAADRIA
email
last changed	2022/06/07 07:56

_id	caadria2016_249
id	caadria2016_249
authors	Kuma, Taichi
year	2016
title	Iterative design process between physical modelling and computational simulation for pre-tensioned grid shell structure
doi	https://doi.org/10.52842/conf.caadria.2016.249
source	Living Systems and Micro-Utopias: Towards Continuous Designing, Proceedings of the 21st International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2016) / Melbourne 30 March–2 April 2016, pp. 249-258
summary	Grid shell structures are widely used in many types of buildings. In this paper the author proposes a new grid shell structure, which is pre-tensioned by stretchable membrane. Through iterative process between physical modelling and computational simulation, one pavilion is finally presented as a demonstration of the architectur- al performance of this structure.
keywords	Material computation; form finding; pavilion; grid shell; active bending
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	acadia16_174
id	acadia16_174
authors	Moorman, Andrew; Liu, Jingyang; Sabin, Jenny E.
year	2016
title	RoboSense: Context-Dependent Robotic Design Protocols and Tools
doi	https://doi.org/10.52842/conf.acadia.2016.174
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 174-183
summary	While nonlinear concepts are widely applied in analysis and generative design in architecture, they have not yet convincingly translated into the material realm of fabrication and construction. As the gap between digital design model, shop drawing, and fabricated result continues to diminish, we seek to learn from fabrication models and natural systems that do not separate code, geometry, pattern, material compliance, communication, and form, but rather operate within dynamic loops of feedback, reciprocity, and generative fabrication. Three distinct, but connected problems: 1) Robotic ink drawing; 2) Robotic wine pouring and object detection; and 3) Dynamically Adjusted Extrusion; were addressed to develop a toolkit including software, custom digital design tools, and hardware for robotic fabrication and user interaction in cyber-physical contexts. Our primary aim is to simplify and consolidate the multiple platforms necessary to construct feedback networks for robotic fabrication into a central and intuitive programming environment for both the advanced to novice user. Our experimentation in prototyping feedback networks for use with robotics in design practice suggests that the application of this knowledge often follows a remarkably consistent profile. By exploiting these redundancies, we developed a support toolkit of data structures and routines that provide simple integrated software for the user-friendly programming of commonly used roles and functionalities in dynamic robotic fabrication, thus promoting a methodology of feedback-oriented design processes.
keywords	online programming, cyber-physical systems, computational design, robotic fabrication, human-robot interaction
series	ACADIA
type	paper
email
last changed	2022/06/07 07:58

_id	ecaade2016_085
id	ecaade2016_085
authors	Okuda, Shinya and Zhenyi, Lin
year	2016
title	Groove Light - Adding Physical Reality to Virtual Projections Using 3D-printed Lanterns
doi	https://doi.org/10.52842/conf.ecaade.2016.1.113
source	Herneoja, Aulikki; Toni Österlund and Piia Markkanen (eds.), Complexity & Simplicity - Proceedings of the 34th eCAADe Conference - Volume 1, University of Oulu, Oulu, Finland, 22-26 August 2016, pp. 113-120
summary	How might 21st-century computational technologies enhance lighting functionality in architecture? The Groove Light provokes relationships between light and shadow, adding a new dimension to future lighting. A series of distinctive and complex 3D-printed lanterns, which cast identical patterns of geometric shadows, creates the optical illusion that they are floating above a continuous, geometric carpet of shadows. The authors tested this concept in three steps: 1. 3D printability, 2. a lighting test and 3. interactivity. The paper also reports the effectiveness of a selective and custom support strategy for printing overhanging geometries with fused deposition modelling (FDM) 3D printers and further highlights differences between the computational models and physical prototypes in the quest for 'point' light sources.
wos	WOS:000402063700013
keywords	Digital Physicality; 3D Printing; Self-supporting Geometry; Stereographic Projection; Projection Mapping
series	eCAADe
email
last changed	2022/06/07 08:00

_id	acadia16_236
id	acadia16_236
authors	Pineda, Sergio; Arora, Mallika; Williams, P. Andrew; Kariuki, Benson M.; Harris, Kenneth D. M.
year	2016
title	The Grammar of Crystallographic Expression
doi	https://doi.org/10.52842/conf.acadia.2016.236
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 236-243
summary	This paper stems from a research collaboration which brings together two disciplines at different ends of the scale spectrum: crystallography and architecture. The science of crystallography demonstrates that the properties of crystalline materials are a function of atomic/molecular interactions and arrangements at the atomic level—i.e., functions of the form and structure of the material. Some of these nano-geometries are frameworks with special characteristics, such as uni-directional porosity, multi-directional porosity, and varied combinations of flexibility and strength. This paper posits that the symmetry operations implicit in these materials can be regarded as a spatial grammar in the design of objects, spaces, and environments. The aim is to allow designers and architects to access the wealth of structural information that is now accumulated in crystallographic databases as well as the spatial symmetry logics utilized in crystallography to describe molecular arrangements. To enable this process, a bespoke software application has been developed as a tool-path to allow for interoperability between crystallographic datasets and CAD-based modelling systems. The application embeds the descriptive logic and generative principles of crystallographic symmetry. Using this software, the project, inter alia, produces results related to a class of geometrical surfaces called Triply Periodic Minimal (TPM) surfaces. In addition to digital iterations, a physical prototype of one such surface called the gyroid was constructed to test potential applications in design. The paper describes the development of these results and the conclusions derived from the first stage of user testing.
keywords	interdisciplinarity, physical prototyping, triply periodic minimal surfaces, computational workflow, bespoke software, crystallographic space groups, nano-scale symmetry, nano-scale periodicity, molecular geometry, crystallographic expression
series	ACADIA
type	paper
email
last changed	2022/06/07 08:00

_id	acadia16_254
id	acadia16_254
authors	Sharmin, Shahida; Ahlquist, Sean
year	2016
title	Knit Architecture: Exploration of Hybrid Textile Composites Through the Activation of Integrated Material Behavior
doi	https://doi.org/10.52842/conf.acadia.2016.254
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 254-259
summary	The hybrid system in textile composites refers to the structural logic defined by Heino Engel, which describes a system that integrates multiple structural behaviors to achieve an equilibrium state (Engel 2007). This research explores a material system that can demonstrate a hybrid material behavior defined by the differentiated tensile and bending-active forces in a single, seamless knitted composite material. These behaviors were installed during the materialization phase and activated during the composite formation process. Here, the material formation involves two interdependent processes: 1) development of the knitted textile with integrated tensile and reinforced materials and 2) development of the composite by applying pre-stress and vacuuming the localized area with reinforcements in a consistent resin-based matrix. The flat bed industrial weft knitting machine has been utilized to develop the knitted textile component of the system with a controlled knit structure. This enables us to control the material types, densities, and cross sections with integrated multiple layers/ribs and thus, the performance of the textile at the scale of fiber structure. Both of these aspects were researched in parallel, using physical and computational methods informed and shaped by the potentials and constraints of each other. A series of studies has been utilized to develop small-scale prototypes that depict the potential of the hybrid textile composite as the generator of complex form and bending active structures. Ultimately, it indicates the possibilities of hybrid textile composite materials as self-structuring lightweight components that can perform as highly articulated and differentiated seamless architectural elements that are capable of transforming the perception of light, space, and touch.
keywords	form-finding, programmable materials, composite forming processes, embedded responsiveness
series	ACADIA
type	paper
email
last changed	2022/06/07 07:56

_id	ascaad2016_017
id	ascaad2016_017
authors	Yazici, Sevil; David J. Gerber
year	2016
title	Prototyping Generative Architecture - Experiments on Multi-Agent Systems, Environmental Performance and 3D Printing
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 145-154
summary	Computational design was developed to solve complex problems in architecture and to enable the establishment of systems with complex properties in a holistic manner. With the enhanced capabilities of computational design, there are possibilities to develop integrated approaches to adapt to multi-faceted design problems. Swarm-based multi-agent systems (MAS) are already used as generative bottom-up methods in various design operations, including form-finding and optimization. This study presents a systematic approach, in which multi-agent systems are informed by the environmental performance assessment data where the output is directly linked to the 3D printing process. The intent is to increase efficiency within the design and prototyping process by integrating performance and fabrication into the early stages of the design process. The proposed method has been applied as a case study to a diverse group of students and professionals. The results have proven that applying this systematic approach enabled the designers to achieve highly sophisticated, formal and organizational outputs, with enhanced spatial and geometric qualities.
series	ASCAAD
email
last changed	2017/05/25 13:31

_id	caadria2016_641
id	caadria2016_641
authors	Baerlecken, D.; K. Wright, J. Reitz, N. Mueller and B. Heiermann
year	2016
title	Performative Agency of Materials: Matter agency of vernacular African pattern systems
doi	https://doi.org/10.52842/conf.caadria.2016.641
source	Living Systems and Micro-Utopias: Towards Continuous Designing, Proceedings of the 21st International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2016) / Melbourne 30 March–2 April 2016, pp. 641-650
summary	This paper investigates an agency of materials through a design methodology that follows Martin Heidegger’s process of “Entbergen” or “unconcealing” as a non-instrumentalist understanding of tools and materials. This investigation takes place through the de- sign of a children’s theatre in South Africa where material innovation for architectural components is needed. The research studies vernacu- lar African patterns and their inherent behaviour when transferred to materials. The transference of pattern systems to architectural proto- types is discussed alongside the discussion of their technical and ar- chitectural performance criteria. Following Heidegger’s theory of “Entbergen” (“unconcealing”) the paper will demonstrate how making in this methodology becomes an “unconcealing”, which includes both digital and analogue means, linking the four causalities - causa mate- rialis, causa formalis, causa finalis, and causa efficiens – through the agency of material within an integrated process between all four caus- es. Making becomes a process in which form is generated through in- terventions within fields of forces and currents of materials, taking cause and agency into account, and standing in opposition to methods that are defined by a premeditated notion of an ideal outcome.
keywords	African patterns, making, design build, design methodology
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	acadia23_v3_39
id	acadia23_v3_39
authors	Goti, Kyriaki; A. Scelsa, Jonathan; Rossi, Natalia; Wang, Wei; Palaci, Arthur
year	2023
title	Bric(k)olage: Spoliated Masonry C+D Waste
source	ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 3: Proceedings of the 43rd Annual Conference for the Association for Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9891764-1-0]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 24-32.
summary	The 2016 US Environmental Protection Agency reported that 23.1 million tons of broken pieces of concrete waste are annually discarded from new construction sites (EPA -2) and in example states in the north american context only 6.6% of C&D concrete is recycled; the rest is thrown out in landfills as it is labeled “contaminated or too hard to process on a large scale.” (CT DOE 25) Relatively little investigation has occurred in how this material could reappear in the architectural project that might honor its intrinsic broken quality as a part of its materiality within a life-cycle of continual usage. This project speaks towards a problematic Habit of the Anthropocene in how we construct buildings placing intrinsic cultural value on new parts over the broken and old due to economic efficiencies.
series	ACADIA
type	field note
email
last changed	2024/04/17 13:59

_id	ascaad2016_052
id	ascaad2016_052
authors	Al-Badry, Sally; Cesar Cheng, Sebastian Lundberg and Georgios Berdos
year	2016
title	Living on the Edge - Reinventing the amphibiotic habitat of the Mesopotamian Marshlands
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 513-526
summary	The Mesopotamian Marshlands form one of the first landscapes where people started to transform and manipulate the natural environment in order to sustain human habitation. For thousands of years, people have transformed natural ecosystems into agricultural fields, residential clusters and other agglomerated environments to sustain long-term settlement. In this way, the development of human society has been intricately linked to the extraction, processing and consumption of natural resources. The Mesopotamian Marshlands, located in one of the hottest and most arid areas on the planet, formed a unique wetlands ecosystem, which apart from millions of people, sustained a very high number of wildlife and endemic species. Several historical, political, social and climatic changes, which densely occurred during the past century, completely destroyed the unique civilisation of the area, made all the wild flora and fauna disappear and forced hundreds of thousands of people to migrate. During the last decade, many efforts have been made to restore the marshlands. However, these efforts are lacking a comprehensive design strategy, coherent goals and deep understanding of the complex current geopolitical situation, making the restoration process an extremely difficult task. This work aims at providing strategies for recovering the Mesopotamian Marshlands, organising productive functions in order to sustain the local population and design a new inhabitation model, using advanced computational tools while taking into account the extreme climatic conditions and several unique cultural aspects. Part of the aim of this work is to advance the use of computation and explore the opportunities that digital tools afford in helping find solutions to complex design problems where various design variables need to be coordinated to satisfy the design goals. Today, advanced computation enables designers to use population consumption demands, ecological processes and environmental inputs as design parameters to develop more robust and resilient regional planning strategies. This work has the double aim of first, presenting a framework for re-inhabiting the Marshlands of Mesopotamia. Second, the work suggests a design methodology based on computer-aided design for developing and organising productive functions and patterns of human occupation in wetland environments.
series	ASCAAD
email
last changed	2017/05/25 13:34

_id	ijac201614207
id	ijac201614207
authors	Chaszar, Andre and Sam Conrad Joyce
year	2016
title	Generating freedom: Questions of flexibility in digital design and architectural computation
source	International Journal of Architectural Computing vol. 14 - no. 2, 167-181
summary	Generative processes and generative design approaches are topics of continuing interest and debate within the realms of architectural design and related fields. While they are often held up as giving designers the opportunity (the freedom) to explore far greater numbers of options/alternatives than would otherwise be possible, questions also arise regarding the limitations of such approaches on the design spaces explored, in comparison with more conventional, human-centric design processes. This article addresses the controversy with a specific focus on parametric-associative modelling and genetic programming methods of generative design. These represent two established contenders within the pool of procedural design approaches gaining increasingly wide acceptance in architectural computational research, education and practice. The two methods are compared and contrasted to highlight important differences in freedoms and limitations they afford, with respect to each other and to ‘manual’ design. We conclude that these methods may be combined with an appropriate balance of automation and human intervention to obtain ‘optimal’ design freedom, and we suggest steps towards finding that balance.
keywords	Design space exploration, parametric-associative modelling, genetic programming, mixed-initiative methods
series	journal
last changed	2016/06/13 08:34

_id	caadria2016_125
id	caadria2016_125
authors	Chen, I-Chih and June-Hao Hou
year	2016
title	Design with bamboo bend: Bridging natural material and computational design
doi	https://doi.org/10.52842/conf.caadria.2016.125
source	Living Systems and Micro-Utopias: Towards Continuous Designing, Proceedings of the 21st International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2016) / Melbourne 30 March–2 April 2016, pp. 125-133
summary	Bamboo is a high potential alternative solution for substi- tuting industrial material with its natural characteristics, economical and environmental aspects. However, one of the biggest challenges for natural materials to be used in computational designed is the control- lability due to its unevenness nature. The other gap is the lack of ma- terial parameters that might be bridged by analysing data acquired from conventional tests. This research studied the raw bamboo strip and its natural forming from bending, by using sampling points and curvature reconstruction. The parametric models of bamboo strips were then constructed to represent its material behaviours for form prediction, material selection, and simulation in parametric design. It also serves as an assistive method for material selection when crafting with bamboo bend.
keywords	Bamboo; bending; material computation; digital crafting
series	CAADRIA
email
last changed	2022/06/07 07:55

_id	caadria2016_559
id	caadria2016_559
authors	Cokcan, Baris; Johannes Braumann, W. Winter and Martin Trautz
year	2016
title	Robotic Production of Individualised Wood Joints
doi	https://doi.org/10.52842/conf.caadria.2016.559
source	Living Systems and Micro-Utopias: Towards Continuous Designing, Proceedings of the 21st International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2016) / Melbourne 30 March–2 April 2016, pp. 559-568
summary	Modern modular constructions can consist of highly indi- vidualised elements that are produced at nearly the same efficiency as serial manufacturing. This paper focuses on the project “WoodWaves” an Info-Point for the conference World Congress of Timber Engineer- ing, which was designed with this new conception of modularity. The process utilises a robotically operated milling cutter to form block- board panels out of spruce, which make up the multifunctional infor- mation point. The entire object is produced with only sliding dovetail joints. Parametric design methods were developed to automatically adjust each joint to fit the individual conditions. New CAD/CAM in- terfaces, linking design directly with fabrication, enabled the serial production of 108 different shaped elements with a 6-axis robotic arm.
keywords	Computational design; robotic production; digital fabrication; wood joints; info-point
series	CAADRIA
email
last changed	2022/06/07 07:56

_id	ecaade2016_114
id	ecaade2016_114
authors	Erdine, Elif and Kallegias, Alexandros
year	2016
title	Calculated Matter - Algorithmic Form-Finding and Robotic Mold-Making
doi	https://doi.org/10.52842/conf.ecaade.2016.1.163
source	Herneoja, Aulikki; Toni Österlund and Piia Markkanen (eds.), Complexity & Simplicity - Proceedings of the 34th eCAADe Conference - Volume 1, University of Oulu, Oulu, Finland, 22-26 August 2016, pp. 163-168
summary	The paper addresses a specific method for the production of custom-made, differentiated moulds for the realization of a complex, doubly-curved wall element during an international three-week architectural programme, Architectural Association (AA) Summer DLAB. The research objectives focus on linking geometry, structure, and robotic fabrication within the material agency of concrete. Computational workflow comprises the integration of structural analysis tools and real-time form-finding methods in order to inform global geometry and structural performance simultaneously. The ability to exchange information between various simulation, modelling, analysis, and fabrication software in a seamless fashion is one of the key areas where the creation of complex form meets with the simplicity of exchanging information throughout various platforms. The paper links the notions of complexity and simplicity throughout the design and fabrication processes. The aim to create a complex geometrical configuration within the simplicity of a single material system, concrete, presents itself as an opportunity for further discussion and development.
wos	WOS:000402063700018
keywords	robotic fabrication; custom form-work; generative design; structural analysis; concrete
series	eCAADe
email
last changed	2022/06/07 07:55

_id	cdrf2023_526
id	cdrf2023_526
authors	Eric Peterson, Bhavleen Kaur
year	2023
title	Printing Compound-Curved Sandwich Structures with Robotic Multi-Bias Additive Manufacturing
doi	https://doi.org/https://doi.org/10.1007/978-981-99-8405-3_44
source	Proceedings of the 2023 DigitalFUTURES The 5st International Conference on Computational Design and Robotic Fabrication (CDRF 2023)
summary	A research team at Florida International University Robotics and Digital Fabrication Lab has developed a novel method for 3d-printing curved open grid core sandwich structures using a thermoplastic extruder mounted on a robotic arm. This print-on-print additive manufacturing (AM) method relies on the 3d modeling software Rhinoceros and its parametric software plugin Grasshopper with Kuka-Parametric Robotic Control (Kuka-PRC) to convert NURBS surfaces into multi-bias additive manufacturing (MBAM) toolpaths. While several high-profile projects including the University of Stuttgart ICD/ITKE Research Pavilions 2014–15 and 2016–17, ETH-Digital Building Technologies project Levis Ergon Chair 2018, and 3D printed chair using Robotic Hybrid Manufacturing at Institute of Advanced Architecture of Catalonia (IAAC) 2019, have previously demonstrated the feasibility of 3d printing with either MBAM or sandwich structures, this method for printing Compound-Curved Sandwich Structures with Robotic MBAM combines these methods offering the possibility to significantly reduce the weight of spanning or cantilevered surfaces by incorporating the structural logic of open grid-core sandwiches with MBAM toolpath printing. Often built with fiber reinforced plastics (FRP), sandwich structures are a common solution for thin wall construction of compound curved surfaces that require a high strength-to-weight ratio with applications including aerospace, wind energy, marine, automotive, transportation infrastructure, architecture, furniture, and sports equipment manufacturing. Typical practices for producing sandwich structures are labor intensive, involving a multi-stage process including (1) the design and fabrication of a mould, (2) the application of a surface substrate such as FRP, (3) the manual application of a light-weight grid-core material, and (4) application of a second surface substrate to complete the sandwich. There are several shortcomings to this moulded manufacturing method that affect both the formal outcome and the manufacturing process: moulds are often costly and labor intensive to build, formal geometric freedom is limited by the minimum draft angles required for successful removal from the mould, and customization and refinement of product lines can be limited by the need for moulds. While the most common material for this construction method is FRP, our proof-of-concept experiments relied on low-cost thermoplastic using a specially configured pellet extruder. While the method proved feasible for small representative examples there remain significant challenges to the successful deployment of this manufacturing method at larger scales that can only be addressed with additional research. The digital workflow includes the following steps: (1) Create a 3D digital model of the base surface in Rhino, (2) Generate toolpaths for laminar printing in Grasshopper by converting surfaces into lists of oriented points, (3) Generate the structural grid-core using the same process, (4) Orient the robot to align in the direction of the substructure geometric planes, (5) Print the grid core using MBAM toolpaths, (6) Repeat step 1 and 2 for printing the outer surface with appropriate adjustments to the extruder orientation. During the design and printing process, we encountered several challenges including selecting geometry suitable for testing, extruder orientation, calibration of the hot end and extrusion/movement speeds, and deviation between the computer model and the physical object on the build platen. Physical models varied from their digital counterparts by several millimeters due to material deformation in the extrusion and cooling process. Real-time deviation verification studies will likely improve the workflow in future studies.
series	cdrf
email
last changed	2024/05/29 14:04

_id	ecaade2017_046
id	ecaade2017_046
authors	Ezzat, Mohammed
year	2017
title	Implementing the General Theory for Finding the Lightest Manmade Structures Using Voronoi and Delaunay
doi	https://doi.org/10.52842/conf.ecaade.2017.2.241
source	Fioravanti, A, Cursi, S, Elahmar, S, Gargaro, S, Loffreda, G, Novembri, G, Trento, A (eds.), ShoCK! - Sharing Computational Knowledge! - Proceedings of the 35th eCAADe Conference - Volume 2, Sapienza University of Rome, Rome, Italy, 20-22 September 2017, pp. 241-250
summary	In previous efforts, the foundation of a general theory that searches for finding lightest manmade structures using the Delaunay diagram or its dual the Voronoi diagram was set (Ezzat, 2016). That foundation rests on using a simple and computationally cheap Centroid method. The simple Centroid method is expected to play a crucial role in the more sophisticated general theory. The Centroid method was simply about classifying a cloud of points that represents specific load case/s stresses on any object. That classification keeps changing using mathematical functions until optimal structures are found. The point cloud then is classified into different smaller points' groups; each of these groups was represented by a single positional point that is related to the points' group mean. Those representational points were used to generate the Delaunay or Voronoi diagrams, which are tested structurally to prove or disprove the optimality of the classification. There was not a single optimized classification out of that process but rather a family of them. The point cloud was the input to the centroid structural optimization, and the family of the optimized centroid method is the input to our proposed implementation of the general theory (see Figure 1). The centroid method produced promising optimized structures that performed from five to ten times better than the other tested variations. The centroid method was implemented using the two structural plugins of Millipede and Karmaba, which run under the environment of the Grasshopper plugin. The optimization itself is done using the grasshopper's component of Galapagos.
keywords	Agent-based structural optimization; Evolutionary conceptual tree representation; Heuristic structural knowledge acquisition ; Centroid structural classification optimization method
series	eCAADe
email
last changed	2022/06/07 07:55

_id	ecaade2016_224
id	ecaade2016_224
authors	Gerber, David and Pantazis, Evangelos
year	2016
title	Design Exploring Complexity in Architectural Shells - Interactive form finding of reciprocal frames through a multi-agent system
doi	https://doi.org/10.52842/conf.ecaade.2016.1.455
source	Herneoja, Aulikki; Toni Österlund and Piia Markkanen (eds.), Complexity & Simplicity - Proceedings of the 34th eCAADe Conference - Volume 1, University of Oulu, Oulu, Finland, 22-26 August 2016, pp. 455-464
summary	This paper presents an integrated workflow for interactive design of shell structures, which couples structural and environmental analysis through a multi-agent systems (MAS) for design. The work lies at the intersection of architecture, engineering and computer science research, incorporating generative design with analytical techniques. A brief review on architectural shell structures and the structural logic of reciprocal frames is described. Through the morphological study of reciprocal frames locally we seek to inform the behavior of a MAS, which integrates form-finding techniques, with daylight factor analysis (DFA) and finite element analysis (FEA) on a global configuration. An experimental design is developed in order to explore the solution space of large span free form shells with varying topologies and boundary conditions, as well as identify the relationships between local design parameters of the reciprocal frames (i.e. number of elements, profile) and the analyses (i.e. stress distribution, solar radiation) for enabling the generation of different global design alternatives. The research improves upon design decision-making latency and certainty through harnessing geometric complexity and structural form finding for early stage design. Additionally, the research improves upon design outcomes by establishing a feedback loop between design generation, analysis and performance.
wos	WOS:000402063700050
keywords	Generative design; computational design; multi-agent systems; shell structures; reciprocal frames; form finding; parametric design
series	eCAADe
email
last changed	2022/06/07 07:51

_id	ascaad2016_042
id	ascaad2016_042
authors	Goud, Srushti
year	2016
title	Parametrizing Indian Karnata-Dravida Temple Using Geometry
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 409-420
summary	The Karnata-Dravida temple tradition flourished and evolved for 700 years. The evolution of the typology was demonstrated through the structure. However, as the Shastras or ancient texts proclaim, the underlying principles of geometry remain unchanged. Geometry and the unchanging principles of construction made the architects experiment with form, material and ornamentation. Geometry does not only mean shapes or two dimensional diagrams but it is a rule to amalgamate all the elements to form a dynamic form of a temple. The paper validates the use of geometry through an evolving sequence of Karnata-Dravida temples with the help of an analytical model created using the grasshopper software. The components of the model are based on the geometric rule (the basis for parametrizing) and parameters of the algorithm – plan forms, organizational compositions, vimana or superstructure composition – which result in a geometry. Even though building science is an old tradition, the use of computational procedures reveals the predictable nature of temples in the Dravidian clan and enables the analysis of existing temples, development of new possibilities or evolution of interpreted forms. Hence, enriching the existing understandings of previous scholarships in the field of temple architecture with an entirely new system of interpretation. In the age of technology where analytics plays a crucial role in almost all sectors, ancient temple architecture in India unfortunately falls behind when it comes to computational methods of restoration or reconstruction. This research questions the applicability of computational technology as a facilitator in preserving or reconstructing existing temples while maintaining its creative liberty.
series	ASCAAD
email
last changed	2017/05/25 13:33

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