Design and 3D printing of reconfigurable strucutures

A Bi-Stable Structure refers to a structure capable to maintaining 2 different states. Mechanically, the structure is able to maintain 2 different shapes at different states. This is due to the Pre-Stressed Limbs/Joints located within the structure. Upon encountering an external force, the structure...

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Main Author: Tay, Raymond Teow Khiat
Other Authors: Huang Weimin
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2019
Subjects:
Online Access:https://hdl.handle.net/10356/136498
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1364982023-03-04T18:21:48Z Design and 3D printing of reconfigurable strucutures Tay, Raymond Teow Khiat Huang Weimin School of Mechanical and Aerospace Engineering MWMHuang@ntu.edu.sg Engineering Engineering::Mechanical engineering A Bi-Stable Structure refers to a structure capable to maintaining 2 different states. Mechanically, the structure is able to maintain 2 different shapes at different states. This is due to the Pre-Stressed Limbs/Joints located within the structure. Upon encountering an external force, the structure will be forced to ‘snap’ to the other state. A common example of this is a Snap Bracelet. In the first state, the bracelet can maintain its straight and stiff shape. However, when a force is applied to the curved surface of the bracelet, the bracelet will snap into the 2nd shape, wrapping itself around the wrist of the user. The proposed idea was to make use of a ‘Web’ of Bi-Stable Structure to form a shoe. In order to solve this challenge, a small section of the shoe is studied and experimented. The goal is to create a small section capable of maintaining this shape at any one time and another when force is applied. These sections will then be formed together with multiple other sections in order to form the shoe. 3D Printing the section was proposed. It allows for the section to be quickly created and in the shape the user need for testing. Material used for testing was ABS and 3D printed by a supplier. Result of the printed structure was not desirable. The main factor was that due to the structure being printed in 1 piece, there was not any Pre-Stressed Limbs/Joints in the structure. The resulting structure could not maintain the 2nd Shape. For Future Testing, it would be recommended to print the limbs of the structure with joints shaped like a rivet. This way, there will be Pre-Stressed formed on the structure. Furthermore, it will be recommended that the limbs are stiff and not able to bend too easily. This way, there will be a reaction force forcing the structure to snap to the various states. Bachelor of Engineering (Mechanical Engineering) 2019-12-20T02:30:37Z 2019-12-20T02:30:37Z 2019 Final Year Project (FYP) https://hdl.handle.net/10356/136498 en Nanyang Technological University application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Engineering::Mechanical engineering
spellingShingle Engineering
Engineering::Mechanical engineering
Tay, Raymond Teow Khiat
Design and 3D printing of reconfigurable strucutures
description A Bi-Stable Structure refers to a structure capable to maintaining 2 different states. Mechanically, the structure is able to maintain 2 different shapes at different states. This is due to the Pre-Stressed Limbs/Joints located within the structure. Upon encountering an external force, the structure will be forced to ‘snap’ to the other state. A common example of this is a Snap Bracelet. In the first state, the bracelet can maintain its straight and stiff shape. However, when a force is applied to the curved surface of the bracelet, the bracelet will snap into the 2nd shape, wrapping itself around the wrist of the user. The proposed idea was to make use of a ‘Web’ of Bi-Stable Structure to form a shoe. In order to solve this challenge, a small section of the shoe is studied and experimented. The goal is to create a small section capable of maintaining this shape at any one time and another when force is applied. These sections will then be formed together with multiple other sections in order to form the shoe. 3D Printing the section was proposed. It allows for the section to be quickly created and in the shape the user need for testing. Material used for testing was ABS and 3D printed by a supplier. Result of the printed structure was not desirable. The main factor was that due to the structure being printed in 1 piece, there was not any Pre-Stressed Limbs/Joints in the structure. The resulting structure could not maintain the 2nd Shape. For Future Testing, it would be recommended to print the limbs of the structure with joints shaped like a rivet. This way, there will be Pre-Stressed formed on the structure. Furthermore, it will be recommended that the limbs are stiff and not able to bend too easily. This way, there will be a reaction force forcing the structure to snap to the various states.
author2 Huang Weimin
author_facet Huang Weimin
Tay, Raymond Teow Khiat
format Final Year Project
author Tay, Raymond Teow Khiat
author_sort Tay, Raymond Teow Khiat
title Design and 3D printing of reconfigurable strucutures
title_short Design and 3D printing of reconfigurable strucutures
title_full Design and 3D printing of reconfigurable strucutures
title_fullStr Design and 3D printing of reconfigurable strucutures
title_full_unstemmed Design and 3D printing of reconfigurable strucutures
title_sort design and 3d printing of reconfigurable strucutures
publisher Nanyang Technological University
publishDate 2019
url https://hdl.handle.net/10356/136498
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