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	ecaade2018_370
id	ecaade2018_370
authors	Abdelmohsen, Sherif, Massoud, Passaint, El-Dabaa, Rana, Ibrahim, Aly and Mokbel, Tasbeh
year	2018
title	A Computational Method for Tracking the Hygroscopic Motion of Wood to develop Adaptive Architectural Skins
doi	https://doi.org/10.52842/conf.ecaade.2018.2.253
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 253-262
summary	Low-cost programmable materials such as wood have been utilized to replace mechanical actuators of adaptive architectural skins. Although research investigated ways to understand the hygroscopic response of wood to variations in humidity levels, there are still no clear methods developed to track and analyze such response. This paper introduces a computational method to analyze, track and store the hygroscopic response of wood through image analysis and continuous tracking of angular measurements in relation to time. This is done through a computational closed loop that links the smart material interface (SMI) representing hygroscopic response with a digital and tangible interface comprising a Flex sensor, Arduino kit, and FireFly plugin. Results show no significant difference between the proposed sensing mechanism and conventional image analysis tracking systems. Using the described method, acquiring real-time data can be utilized to develop learning mechanisms and predict the controlled motion of programmable material for adaptive architectural skins.
keywords	Hygroscopic properties of wood; Adaptive architecture; Programmable materials; Real-time tracking
series	eCAADe
email
last changed	2022/06/07 07:54

_id	ecaade2018_347
id	ecaade2018_347
authors	Dokonal, Wolfgang
year	2018
title	Do Training Bikes Dream of Electric Cities ?
doi	https://doi.org/10.52842/conf.ecaade.2018.2.789
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 789-794
summary	Virtual reality (VR), Augmented Reality (AR) and Mixed Reality is making the headlines in the newspapers and magazines today. But unlike 25 years ago when the first VR rage started with the first Cave Automatic Virtual Environments (CAVE) infrastructures VR is now a technique that is available at very low costs.Especially the recent advances and developments in low cost VR hardware mainly the Head mounted displays (HMD), in particular those that use mobile phones but also the PC based systems like the Oculus Rift and the HTC Vive together with recent software developments allow this change. Naturally this is based on the interest of the Gaming Industry and the big players in the smartphone industry. But at the moment there are nearly no tools for architects available within these systems. In our point of view there is the big potential that these technologies can give new opportunities to architects and designers to use VR and AR as part of their design toolbox and not only as a presentation tool. For us this is the most important aspect. In our projects we therefore try to develop a workflow that can be easily used even without programming and scripting skills.
keywords	Virtual Reality; Interfaces
series	eCAADe
email
last changed	2022/06/07 07:55

_id	acadia23_v1_34
id	acadia23_v1_34
authors	Gascon Alvarez, Eduardo; Curth, Alexander (Sandy); Feickert, Kiley; Martinez Schulte, Dinorah; Mueller, Caitlin; Ismail, Mohamed
year	2023
title	Algorithmic Design for Low-Carbon, Low-Cost Housing Construction in Mexico
source	ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 1: Projects Catalog of the 43rd Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9860805-8-1]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 34-38.
summary	Mexico is one of the most urbanized countries in the Global South, and simultaneously faces a rapidly increasing population and a deluge of inadequate housing (URBANET 2019). In 2016, it was estimated that 40 percent of all private residences in Mexico were considered inadequate by UN-Habitat (UN-Habitat 2018). As informal housing constitutes over half of all Mexican housing construction, the most vulnerable groups of the population are particularly impacted. Therefore, there is a serious need to innovate in the area of low-cost building construction for housing in Mexico. This research explores how shape-optimized concrete and earth construction could help provide adequate housing without jeopardizing the country’s commitment to sustainability.
series	ACADIA
type	project
email
last changed	2024/04/17 13:58

_id	sigradi2018_1668
id	sigradi2018_1668
authors	Klein Taparello, Gladys Ilka; Turazzi Luciano, Patrícia; Verzola Vaz, Carlos Eduardo
year	2018
title	Use of Hygroscopic Responsive Wood Prototype for Teaching Performative Architecture
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 1084-1090
summary	This research presents a method for teaching performative architecture notions to undergraduate students through a practical approach with low cost hygroscopic responsive bilayer prototypes made of wood veneer and aluminum foil. The research occurred in two phases, the first focusing on studying and testing the properties of responsive materials based on wood, and the second, the development and application of two workshops about performative architecture and responsive materials with undergraduate students of an architecture course. This paper shows the results of the workshops, which achieved their goals of stimulating the students and passing knowledge about innovative technologies in architecture.
keywords	Performative architecture; Smart material; Teaching; Wood hygroexpansion
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	ecaade2018_233
id	ecaade2018_233
authors	Kontiza, Iacovina, Spathi, Theodora and Bedarf, Patrick
year	2018
title	Spatial Graded Patterns - A case study for large-scale differentiated space frame structures utilising high-speed 3D-printed joints
doi	https://doi.org/10.52842/conf.ecaade.2018.2.039
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 39-46
summary	Geometric differentiation is no longer a production setback for industrial grade architectural components. This paper introduces a design and fabrication workflow for non-repetitive large-scale space frame structures composed of custom-manufactured nodes, which exploits the advantages of latest advancements in 3D-printing technology. By integrating design, fabrication and material constraints into a computational methodology, the presented approach addresses additive manufacturing of functional industry-grade parts in short time, high speed and low cost. The resulting case study of a 4.5 x 4.5 x 2.5 m lightweight kite structure comprises 1380 versatile fully-customised connectors and outlines the manifold potential of additive manufacturing for architecture much bigger than the machine built space. First, after briefly introducing space frames in architecture, this paper discusses the computational framework of generating irregular space frames and parametric joint design. Second, it examines the advantages of MJF printing in conjunction with integrating smart sequencing details for the following assembly process. Finally, a conclusive outlook is given on improvements and further developments for bespoke 3D-printed space frame structures.
keywords	3D-printing; Multi-Jet Fusion; Space Frame; Graded Subdivision
series	eCAADe
email
last changed	2022/06/07 07:51

_id	ecaade2018_134
id	ecaade2018_134
authors	Wurzer, Gabriel and Lorenz, Wolfgang E.
year	2018
title	Options for obtaining a 'Gründerzeit' flat - A wet dream explored by means of a Cellular Automata model
doi	https://doi.org/10.52842/conf.ecaade.2018.2.639
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 639-646
summary	This work explores the dichotomy between old areas offering high-quality living in a low-density neighborhood (typically near the city center) and newly-developed areas with high-density and lesser quality in the suburbs. It especially addresses the scarcity of rentable 'Gründerzeit' flats in Vienna/Austria which have a ceiling height of 3.40m and date back to the mid-19th century. Other European cities have the same problem - supply of old properties perceived as offering a high quality of living does not meet the demand, which leads to high rent prices. The authors have captured the current situation of the housing market using Cellular Automaton (CA) rules; their main contribution lies in the exploration of three additional rules that seek to improve the availability of old (i.e. 'Gründerzeit') flats.
keywords	Social Uprising through Cellular Automata
series	eCAADe
email
last changed	2022/06/07 07:57

_id	caadria2019_204
id	caadria2019_204
authors	Calixto, Victor, Gu, Ning and Celani, Gabriela
year	2019
title	A Critical Framework of Smart Cities Development
doi	https://doi.org/10.52842/conf.caadria.2019.2.685
source	M. Haeusler, M. A. Schnabel, T. Fukuda (eds.), Intelligent & Informed - Proceedings of the 24th CAADRIA Conference - Volume 2, Victoria University of Wellington, Wellington, New Zealand, 15-18 April 2019, pp. 685-694
summary	This paper investigates through a review of the current literature on smart cities, reflecting different concepts across different political-social contexts, seeking to contribute to the establishment of a critical framework for smart cities development. The present work provides a review of the literature of 250 selected publications from four databases (Scielo, ScienceDirect, worldwide science, and Cumincad), covering the years from 2012 to 2018. Publications were categorised by the following steps: 3RC framework proposed by Kummitha and Crutzen (2017), the main political sectors of city planning, implementation strategies, computational techniques, and organisation rules. The information was analised graphically trying to identify tendencies along the time, and also, seeking to explore future possibilities for implementations in different political-social contexts. As a case of study, Australia and Brazil were compared using the proposed framework.
keywords	smart city; smart cities; literature review
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	caadria2018_085
id	caadria2018_085
authors	Chung, Chia-Chun and Jeng, Tay-Sheng
year	2018
title	Information Extraction Methodology by Web Scraping for Smart Cities - Using Machine Learning to Train Air Quality Monitor for Smart Cities
doi	https://doi.org/10.52842/conf.caadria.2018.2.515
source	T. Fukuda, W. Huang, P. Janssen, K. Crolla, S. Alhadidi (eds.), Learning, Adapting and Prototyping - Proceedings of the 23rd CAADRIA Conference - Volume 2, Tsinghua University, Beijing, China, 17-19 May 2018, pp. 515-524
summary	This paper presents an opportunistic sensing system for air quality monitoring to forecast the implicit factors of air pollution. Opportunistic sensing is performed by web scraping in the social network service to extract information. The data source for the air quality analysis combines two types of information: explicit and implicit information. The objective is to develop the information extraction methodology by web scraping for smart cities. The application development methodology has potential for solving real-world problems such as air pollution by data comparison between social activity observing and data collecting in sensor network.
keywords	smart city; open data; web scraping; social media; machine learning
series	CAADRIA
email
last changed	2022/06/07 07:56

_id	ecaade2018_301
id	ecaade2018_301
authors	Cocho-Bermejo, Ana, Birgonul, Zeynep and Navarro-Mateu, Diego
year	2018
title	Adaptive & Morphogenetic City Research Laboratory
doi	https://doi.org/10.52842/conf.ecaade.2018.2.659
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 659-668
summary	"Smart City" business model is guiding the development of future metropolises. Software industry sales to town halls for city management services efficiency improvement are, these days, a very pro?table business. Being the model decided by the industry, it can develop into a dangerous situation in which the basis of the new city design methodologies is decided by agents outside academia expertise. Drawing on complex science, social physics, urban economics, transportation theory, regional science and urban geography, the Lab is dedicated to the systematic analysis of, and theoretical speculation on, the recently coined "Science of Cities" discipline. On the research agenda there are questions arising from the synthesis of architecture, urban design, computer science and sociology. Collaboration with citizens through inclusion and empowerment, and, relationships "City-Data-Planner-Citizen" and "Citizen-Design-Science", configure Lab's methodology provoking a dynamic responsive process of design that is yet missing on the path towards the real responsive city.
keywords	Smart City; Morphogenetic Urban Design; Internet of Things; Building Information Modelling; Evolutionary Algorithms; Machine Learning & Artificial Intelligence
series	eCAADe
email
last changed	2022/06/07 07:56

_id	ecaade2018_w11
id	ecaade2018_w11
authors	Kunze, Antje, Marz, Michael and Wyka, Edyta
year	2018
title	Smart Communities - Unleashing the Potential of Data for Smart Communities
doi	https://doi.org/10.52842/conf.ecaade.2018.1.069
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 1, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 69-70
summary	Are you excited about data, mapping and analytics and want to learn new skills? Then you'll love our hands-on workshop on how to collect and blend open and premium data with the cities' everyday planning and management tasks, analyze urban environments, and deliver the results in stunning 2D and 3D web mapping apps.
keywords	smart city; GIS; data visualisation; data driven design
series	eCAADe
email
last changed	2022/06/07 07:52

_id	sigradi2018_1510
id	sigradi2018_1510
authors	Lafluf Cuevas, Marcos; Barber Sarasola, Gabriela; García Amen, Fernando
year	2018
title	Emerging ecosystems of information and city: Anglo digital repository
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 1023-1030
summary	This paper focuses on the implementation of a digital repository and content management of the Museo de la Revolución Industrial, in Fray Bentos, as part of a project carried out in the context of the I+D project "La ciudad inteligente; un palimpsesto digital", currently under development in the Laboratory of Advanced Digital Visualization (Vidialab) of the Faculty of Architecture, Design and Urbanism (FADU). The project main theme is the emerging paradigm of Smart Cities with focus on the territory as an integral cultural landscape. The experience, implementation, processed involved and related topics, are described and analyzed theoretically, in the search of architectural and historical heritage dissemination.
keywords	Heritage; Smart City; TIC; Digital repository; Dissemination of heritage; Free software
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	sigradi2018_1587
id	sigradi2018_1587
authors	Maia, Marcelo; Borges, Jéssica; Brito, Michele; de Sá, Ana Isabel
year	2018
title	Internet of Things Technology and Policy in Belo Horizonte Public Transportation System
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 568-573
summary	From a critical point of view regarding Smart Cities, this paper presents an overview of Brazilian policies concerning the application of Internet of Things (IoT) on public transportation systems, using as a case study the city of Belo Horizonte. We performed a critical analysis of its public transportation system considering the already installed IoT infrastructure, including mobile communication technology that uses distributed locative media among users. Our main focus was understanding its use, potential and political dimension, specially concerning terms of use and data distribution and sharing between users, public administration and private companies that compose the transportation system.
keywords	urban transportation system; technopolitics; internet of things; smart city; instant city
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	sigradi2018_1405
id	sigradi2018_1405
authors	Massara Rocha, Bruno; Santo Athié, Katherine
year	2018
title	Emerging senses from Smart Cities phenomenon
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 434-441
summary	The paper analyses the emerging senses from the Smart Cities phenomenon, using as background Lemos (2017), Maia (2013), Rozestraten (2016), Söderström, Paache & Klauser (2014) and evaluating the speeches found in the SmartCity Expo Curitiba. We identified three basic senses: the binary utopia/ficcion, business and informational city, discussed by philosophers such as Foucault (2017), Lévy (2011) e Harvey (2014). The results outline the importance of political role of technology and adverts that it must not be controlled by business. Finally, the paper concludes that the smartest technology is one that opens space to the inclusion of greater human expressivity and subjectivity, not inducing a space of control.
keywords	Smart cities; Digital technologies; Technopolitics;
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	ecaade2018_246
id	ecaade2018_246
authors	Qureshi, Cyrus, Schnabel, Marc Aurel and Moleta, Tane
year	2018
title	CityAR: Wellington - Exploring Cities through Mixed Realities
doi	https://doi.org/10.52842/conf.ecaade.2018.2.687
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 687-692
summary	This paper aims to study the potential impact of Virtual, Augmented and Mixed Realities (VAM) technologies on the built environment and to understand how immersive environments can be used to enhance the human experience within the built environment. In order to investigate and test how these technologies may improve our experience of the city, an augmented reality app is being developed in partnership with Victoria University of Wellington, the Wellington City Council and NEC, New Zealand. The research aims to explore ways in which VAM helps users in exploring cities. The philosophical driver of this project aims to focus on supporting the experience of moving between two points on a map rather than achieving the shortest route to a destination. Once developed, the project proposes the CityAR app which is to be distributed to the general public in order for them to test its functionality and in return, provide user feedback.
keywords	Mixed Environments; Augmented Reality; Smart Cities; Cybrids
series	eCAADe
email
last changed	2022/06/07 08:00

_id	ecaade2018_262
id	ecaade2018_262
authors	Zarzycki, Andrzej
year	2018
title	Strategies for the Integration of Smart Technologies into Buildings and Construction Assemblies
doi	https://doi.org/10.52842/conf.ecaade.2018.1.631
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 1, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 631-640
summary	This paper reviews current Internet of Things frameworks integrating embedded and distributed sensing and actuation in the context of research prototyping and the do-it-yourself movement. It focuses on the open-source and open-access technologies that can be applied into wiring smart cities, smart buildings, and smart building components. The paper contextualizes this discussion through the examples of the ESP8266 microcontroller (also known as NodeMCU) and Raspberry Pi single-board computer as well as web services such as Node-RED and If This Then That (IFTTT). The value of these platforms lies in the quasi-compatibility with other systems, scalability, and direct applicability to building technology prototyping. As such, they provide a natural and effective development path for a prototype to a full integration implementation.
keywords	Smart Assemblies; Smart Buildings; Internet of Things; Raspberry Pi; Node-RED; MQTT
series	eCAADe
email
last changed	2022/06/07 07:57

_id	ecaade2018_332
id	ecaade2018_332
authors	de Azambuja Varela, Pedro and Sousa, José Pedro
year	2018
title	Reinforced, Reusable, Reconfigurable Molds for Cast Voussoirs
doi	https://doi.org/10.52842/conf.ecaade.2018.1.771
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 1, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 771-780
summary	This paper describes the theory and practical experiments on the development of a system for the deployment of stereotomic voussoirs. The recent availability of digital design and fabrication tools has enabled architects to embrace stereotomic thinking, allowing for the efficient spanning of spaces with low tensile capable materials such as stone. The proposed fabrication system is an evolution of an on-going research which creates a direct link between the geometrical and material needs of a stereotomic structure with materialization tools that enable the swift creation of multiple customized blocks.
keywords	stereotomy; voussoir; mould; robotic; mass customization; plaster
series	eCAADe
email
last changed	2022/06/07 07:55

_id	sigradi2018_1763
id	sigradi2018_1763
authors	Duarte Martins, Lucas; Ferreira Borges, Marina
year	2018
title	The Use of High Low Architecture in the Creation of Alternative Construction Elements
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 367-374
summary	This study presents an investigation on how the use of digital tools in the fields of architecture and engineering can help establish a connection between the architectural projects developed within Universities and what is produced by the construction industry, consolidating a critical design process that reflects on the use of current technologies. To do so, it will be necessary to employ knowledge gathered from the intersecting areas of architecture, computation and engineering to rethink the use of common materials directing it towards a non-specialized workforce, a relationship that can be defined as high-low architecture.
keywords	High-Low Architecture; Concrete block; Digital tools; Performance-based design; Construction industry
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	ecaade2018_297
id	ecaade2018_297
authors	Elesawy, Amr, Caranovic, Stefan, Zarb, Justin, Jayathissa, Prageeth and Schlueter, Arno
year	2018
title	HIVE Parametric Tool - A simplified energy simulation tool for educating architecture students
doi	https://doi.org/10.52842/conf.ecaade.2018.1.657
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 1, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 657-666
summary	This paper presents HIVE, a new open source design toolbox, which focuses on teaching concepts of Energy and Climate Systems integration in buildings. .The aim is to empower architecture students to integrate aspects of energy efficiency during the architectural design process. The tool employs a simplified input format designed for ease of use and provides almost instantaneous, direct feedback to support students of all experience levels in the early, conceptual building design stages, where numerous iterations need to be conducted efficiently within a short period of time.The project aims to create a robust toolbox that will become an innovative reference in architecture and engineering - lectures, design studios, and project-based learning - through its capacity to quickly, and effectively, translate building energy systems concepts into graphic formats central to building design teaching and practice. The fast feedback that the users receive to their design parameters changes will enable an effective and quick build-up of tacit knowledge about building energy systems, complementary to the explicit, theoretical knowledge that is usually taught in courses, thus creating a more complete learning experience.
keywords	Building Simulation; Low-energy architecture; Integrated curriculum; PV Assessment; Simplified GUI; Architecture Education
series	eCAADe
email
last changed	2022/06/07 07:55

_id	ecaade2018_336
id	ecaade2018_336
authors	Ena, Valeria
year	2018
title	De-coding Rio de Janeiro's Favelas - Shape grammar application as a contribution to the debate over the regularisation of favelas. The case of Parque Royal.
doi	https://doi.org/10.52842/conf.ecaade.2018.2.429
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 2, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 429-438
summary	This study constitutes the first step of a broader PhD project, which aims to build a bridge between the architectural and the juridical examination of the typicality of low-income settlements within the city of Rio de Janeiro, the favelas. The purpose is to define a rule-based typological analysis to ease the process of evaluating the typicality of favelas and the possible, desirable form of its regularisation. This objective strives to equip all the actors involved in the debate with an analytical device able to represent the socially acknowledged, yet unofficial, rules that have been moulding favelas so far. By this means, this study tests shape grammar as a methodology for approaching this interdisciplinary issue. A shape grammar for a first case study, Parque Royal favela, located in the Governor Island, is presented. As preliminary results of the research, the paper encompasses the three early stages of construction of the case study: invasion, expansion and consolidation.
keywords	favelas (slums); urban regularisation; Rio de Janeiro; shape grammar; typology; master plan implementation
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

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