DIGITAL FABRICATION AS A LEARNING MEDIA FOR LIGHTWEIGHT STRUCTURE WITH CASE STUDY OF SHELL STRUCTURE

MODUL ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 126-133
Author(s):  
Stephanus Evert Indrawan ◽  
LMF Purwanto
Keyword(s):  
Shell Structure ◽  
Laser Cutting ◽  
Digital Fabrication ◽  
Scalar Model ◽  
Structure System ◽  
Lightweight Structures ◽  
Digital Devices ◽  
Lightweight Structure ◽  
Realization Process

The lightweight structure system is an effort to optimize the structure to distribute the load efficiently. Unfortunately, students often have difficulty imagining the learning outcomes application in the real world when studying light structural systems. However, the use of the scalar model can still explain several essential aspects of a lightweight structural system, one of which is the effect of connection and formation of material components on the structural capability. Therefore, this paper aims to bridge the learning process by utilizing digital devices from the concept stage of structural modeling with the help of software (Rhinoceros, Grasshopper, and Kangaroo) to the realization process using laser cutting. The method used is a semi-experimental method that applies Hooke's law principle, which produces a shell structure system with a digital fabrication approach that utilizes a lightweight material, namely, corrugated paper board, as the primary material. This paper concludes that digital technology and digital fabrication processes can help students understand the concept of lightweight structures because they can use computer simulations, cut them using laser cutting, and assemble them in the field in a series of simultaneous processes. 

scholarly journals Lightweight Grid Shell Pavilion - Design, Manufacture and Erection of Full Scale Grid Shell Prototypes

2016 ◽  
Vol 11 (2) ◽  
pp. 115-128
Author(s):  
Aleš Vaněk
Keyword(s):  
Shell Structure ◽  
Single Layer ◽  
Full Scale ◽  
Interesting Phenomenon ◽  
Lightweight Structures ◽  
Time Space ◽  
Grid Shell ◽  
Layer Membrane ◽  
Lightweight Structure ◽  
Scale Grid

Abstract The main goal of author’s research is to design and construct grid shell structures, which are subsequently realized as experimental structures in full scale. These structures should make the place suitable for various events and also a friendly, pleasant, relaxing and free time space. By thinking about how such structure should look like and what materials and structure types are suitable, there were many kinds of lightweight structures considered. The most logical solution is to create a grid shell structure combining with a single layer membrane that would fulfill all aspects of elegant remarkable lightweight structure using some original details and workflow advancements. These grid shell projects should demonstrate another possibility to build and think about unconventional structures and provoke a deeper interest in these unique structures. The goal of this project was to create a feasible design of a grid shell structure and to build up the structures while being capable to understand the core of such an interesting phenomenon.

scholarly journals Co-Design of Do-It-Yourself Face Shield in Japan Under COVID-19 Pandemic

2020 ◽  
Vol 13 (3) ◽  
pp. 502-510
Author(s):  
Kazutoshi Tsuda ◽  
Mariko Sakuragi
Keyword(s):  
Laser Cutting ◽  
Healthcare Workers ◽  
Digital Fabrication ◽  
Numerical Control ◽  
Maker Movement ◽  
The Past ◽  
Open Design ◽  
3D Printers ◽  
Do It Yourself

  Along with the spread of open design environments and various types of digital fabrication tools (e.g., computer numerical control machines, laser cutting devices, and 3D printers), the "maker movement" or "personal fabrication" has been spreading worldwide over the past decade. This case study introduces grassroots activities in Japan that are employing personal fabrication tools to manage the COVID-19 crisis, focusing on the co-design of do-it-yourself face shields for healthcare workers. We address various issues emerging from the activities of face shield production: (1) development of face shield designs and materials, (2) examination and information sharing regarding the practicality and safety of open-source designs, and (3) collaboration with local factories. Thus, we demonstrate the significance of maker contributions to COVID-19, and provide suggestions for challenges in the future.

scholarly journals Investigation of Energy-Absorbing Properties of a Bio-Inspired Structure

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 881
Author(s):  
Adrian Dubicki ◽  
Izabela Zglobicka ◽  
Krzysztof J. Kurzydłowski
Keyword(s):  
Absorption Capacity ◽  
Compression Tests ◽  
Element Analysis ◽  
Lightweight Structures ◽  
New Energy ◽  
Absorbing Material ◽  
Lightweight Structure ◽  
3D Printed ◽  
Deformation Force ◽  
Energy Absorbing

Numerous engineering applications require lightweight structures with excellent absorption capacity. The problem of obtaining such structures may be solved by nature and especially biological structures with such properties. The paper concerns an attempt to develop a new energy-absorbing material using a biomimetic approach. The lightweight structure investigated here is mimicking geometry of diatom shells, which are known to be optimized by nature in terms of the resistance to mechanical loading. The structures mimicking frustule of diatoms, retaining the similarity with the natural shell, were 3D printed and subjected to compression tests. As required, the bio-inspired structure deformed continuously with the increase in deformation force. Finite element analysis (FEA) was carried out to gain insight into the mechanism of damage of the samples mimicking diatoms shells. The experimental results showed a good agreement with the numerical results. The results are discussed in the context of further investigations which need to be conducted as well as possible applications in the energy absorbing structures.

scholarly journals TOOLS FOR RECORDING PROTOTYPING ACTIVITIES AND QUANTIFYING CORRESPONDING DOCUMENTATION IN THE EARLY STAGES OF PRODUCT DEVELOPMENT

2021 ◽  
Vol 1 ◽  
pp. 3159-3168
Author(s):  
Sohail Ahmed Soomro ◽  
Yazan A M Barhoush ◽  
Zhengya Gong ◽  
Panos Kostakos ◽  
Georgi V. Georgiev
Keyword(s):  
Product Development ◽  
Learning Process ◽  
Design Education ◽  
Development Process ◽  
Digital Fabrication ◽  
Prototype Development ◽  
Early Stages ◽  
Creative Solutions ◽  
Insight Into

AbstractPrototyping is an essential activity in the early stages of product development. This activity can provide insight into the learning process that takes place during the implementation of an idea. It can also help to improve the design of a product. This information and the process are useful in design education as they can be used to enhance students' ability to prototype their ideas and develop creative solutions. To observe the activity of prototype development, we conducted a study on students participating in a 7-week course: Principles of Digital Fabrication. During the course, eight teams made prototypes and shared their weekly developments via internet blog posts. The posts contained prototype pictures, descriptions of their ideas, and reflections on activities. The blog documentation of the prototypes developed by the students was done without the researchers' intervention, providing essential data or research. Based on a review of other methods of capturing the prototype development process, we compare existing documentation tools with the method used in the case study and outline the practices and tools related to the effective documentation of prototyping activity.

scholarly journals Navigating Digital Borderscapes: A Case Study from Rohingya Refugee Settlements in Bangladesh

2021 ◽  
Vol 8 (3) ◽  
pp. 190-210
Author(s):  
Faheem Hussain ◽  
Yenn Lee
Keyword(s):  
Lived Experiences ◽  
Community Leaders ◽  
Digital Rights ◽  
Digital Devices ◽  
Refugee Community ◽  
Hybrid Solutions ◽  
Different Types ◽  
Host Government

Abstract Based on a case study of the lived experiences of Rohingya refugees in Bangladesh between 2017 and 2019, this article focuses on displaced people’s digital needs and innovative efforts to navigate the challenges in their situation. The article first discusses the major barriers faced by Rohingya refugees in using various digital devices and platforms and how these obstacles adversely affect them in obtaining necessary information and humanitarian services. Our findings from the field highlight the uniquely important role that mobile repair shops in the camps play in providing online-offline hybrid solutions to circumvent restrictions imposed on the refugee community by the host government. The findings also show that different types of community leaders have emerged and that Rohingya women use digital means to push back against double discrimination. The article concludes with policy considerations related to the geopolitically transcendent issues of displacement, democracy, and digital rights.

Design of the Lightweight Structure and its Mechanical Properties

2013 ◽  
Vol 461 ◽  
pp. 57-62
Author(s):  
Xiao Ting Jiang ◽  
Ce Guo ◽  
Xiu Yan Cao ◽  
Zhen Yu Lu
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Fiber Material ◽  
Element Analysis ◽  
Static Compression ◽  
Lightweight Structures ◽  
Carbon Fiber Material ◽  
The Finite Element Analysis ◽  
Lightweight Structure

Based on the microstructure of the cross-section of the beetle's elytra, a kind of bio-inspiredlightweight structure was designed and made by the carbon fiber material. The compressive andshear mechanical properties of the lightweight structures were studied with finite element method.In addition, quasi-static compression experiments of the structure samples were carried out. Theexperimental results and the finite element analysis results were compared and analyzed, whichproved the effectiveness of the finite element analysis.

DATA EXTRACTION FROM PASSWORD PROTECTED MOBILE PHONE BY USING CHIP-OFF METHOD –A FORENSIC CASE STUDY

2021 ◽  
Vol 10 (3) ◽  
pp. 28-37
Keyword(s):  
Mobile Phone ◽  
Data Extraction ◽  
Digital Devices ◽  
Digital Era ◽  
Suicide Case ◽  
Forensic Case ◽  
Trial And Error Method ◽  
Error Method ◽  
Deceased Individual

The current digital era is full of digital devices and to ensure the safety of their data, users utilize the protective armor of passwords using the fingerprints lock, face lock, pin codes and password locks. The trial-and-error method possesses an infinite possibility of passwords in patterns/ pin locks for unlocking the devices. The levels of security ensure that only a limited number of trials are possible before any device blocks itself or makes unlocking harder. In these circumstances, especially when a victim is a deceased person (e. g. an abetment in suicide case), the password is practically impossible to attain through the authorities. However, the data can be retrieved with the unique and distinctive method of Chip-off analysis. In this study, a password protected mobile phone was retrieved from a deceased individual and only the analysis of his/her mobile could lead to investigative insights for catching the perpetrator. The Chip-off method has several difficulties and a password/ pin protected device increases the difficulties for analysis several folds. This study highlights the significance of chip-off analysis in achieving accurate importing and extraction of maximum data along with the use of the hardware/software, MSAB, XRY and other software.

Transiting between Representation Technologies and Teaching/Learning Descriptive Geometry

2016 ◽  
pp. 250-273 ◽  
Author(s):  
Janice de Freitas Pires ◽  
Luisa Dalla Vecchia ◽  
Adriane Almeida da Silva Borda
Keyword(s):  
Virtual Reality ◽  
Augmented Reality ◽  
3D Printing ◽  
Laser Cutting ◽  
Digital Fabrication ◽  
Physical Models ◽  
Descriptive Geometry ◽  
Parametric Modelling ◽  
Digital Representation ◽  
Teaching Learning

Teaching descriptive geometry, in the context of this study, is characterized by the continuous investment in recognizing digital representation technologies which can enhance the didactic activities in architectural training. This study describes this trajectory which includes the use of virtual reality, augmented reality and parametric modelling, as well as freehand drawing and the production of physical models both by automating the unfolding process and by digital fabrication processes of 3D printing and laser cutting. In addition to questioning the relevance and sustainability of the infrastructure needed to ensure the continuation of this trajectory, the potentialities identified in each of the learning activities that have been structure, are shown. Although these potentialities are specific to this context, it is considered that this type of record contributes to understand the issues being faced in teaching practices.

Case-Study on the Application of Precast Double-Curved Concrete Elements for the Green Planet Shell Structure

2017 ◽  
pp. 2494-2502
Author(s):  
Sietse Witterholt ◽  
Roel Schipper ◽  
Steffen Grünewald ◽  
Pierre Hoogenboom ◽  
Rob Nijsse ◽  
...  
Keyword(s):  
Shell Structure ◽  
Concrete Elements
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