Four dimensional printing with single and multi-component smart material structures

3D printing has been constantly evolving through decades since the invention in 1984. And it has been developed into 4D printing with the 4th dimension – time dimension from the static 3D printing. Printed objects are able to change their shapes when triggered by some external stimuli such as magnet...

Full description

Saved in:
Bibliographic Details
Main Author: Feng, Xiaofan
Other Authors: Li Lin
Format: Final Year Project
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/10356/74965
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-74965
record_format dspace
spelling sg-ntu-dr.10356-749652023-03-04T18:17:34Z Four dimensional printing with single and multi-component smart material structures Feng, Xiaofan Li Lin Liu Yong School of Mechanical and Aerospace Engineering DRNTU::Engineering 3D printing has been constantly evolving through decades since the invention in 1984. And it has been developed into 4D printing with the 4th dimension – time dimension from the static 3D printing. Printed objects are able to change their shapes when triggered by some external stimuli such as magnetic field, heat, optimal and moisture etc. In this project, shape memory polymers (VeroWhitePlus, DM 8510, DM 8520 and DM 8530 which have different compositions of materials) were used to study the recovery properties. Shape recovery tests have been carried out using a tensile machine and a temperature-controlling water tank. The recovery properties among four materials were obtained. Cross-folding, which means the structure is folded with two overlapping folds, has been investigated using the material that has the best recovery property. The smaller the geometric hinge thickness, the faster the shape recovery. The existence of a hole in the centre of the folding region helped to release the stress and prevent fracture. A sample with hinge thickness of 0.5 mm could be folded five times in average before fracture, while the maximum folding time for hinge with thickness of 0.3mm is seven in average before fracture. The hinge with thickness of 0.2mm was sensitive to the force and 0.1 mm lost structure strength that could not even be folded without cracking. A starfish and an umbrella shape were created using CAD software and were used to demonstrate the implementation of cross-folding using multi-component structure materials. Bachelor of Engineering (Mechanical Engineering) 2018-05-25T05:59:12Z 2018-05-25T05:59:12Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/74965 en Nanyang Technological University 64 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Feng, Xiaofan
Four dimensional printing with single and multi-component smart material structures
description 3D printing has been constantly evolving through decades since the invention in 1984. And it has been developed into 4D printing with the 4th dimension – time dimension from the static 3D printing. Printed objects are able to change their shapes when triggered by some external stimuli such as magnetic field, heat, optimal and moisture etc. In this project, shape memory polymers (VeroWhitePlus, DM 8510, DM 8520 and DM 8530 which have different compositions of materials) were used to study the recovery properties. Shape recovery tests have been carried out using a tensile machine and a temperature-controlling water tank. The recovery properties among four materials were obtained. Cross-folding, which means the structure is folded with two overlapping folds, has been investigated using the material that has the best recovery property. The smaller the geometric hinge thickness, the faster the shape recovery. The existence of a hole in the centre of the folding region helped to release the stress and prevent fracture. A sample with hinge thickness of 0.5 mm could be folded five times in average before fracture, while the maximum folding time for hinge with thickness of 0.3mm is seven in average before fracture. The hinge with thickness of 0.2mm was sensitive to the force and 0.1 mm lost structure strength that could not even be folded without cracking. A starfish and an umbrella shape were created using CAD software and were used to demonstrate the implementation of cross-folding using multi-component structure materials.
author2 Li Lin
author_facet Li Lin
Feng, Xiaofan
format Final Year Project
author Feng, Xiaofan
author_sort Feng, Xiaofan
title Four dimensional printing with single and multi-component smart material structures
title_short Four dimensional printing with single and multi-component smart material structures
title_full Four dimensional printing with single and multi-component smart material structures
title_fullStr Four dimensional printing with single and multi-component smart material structures
title_full_unstemmed Four dimensional printing with single and multi-component smart material structures
title_sort four dimensional printing with single and multi-component smart material structures
publishDate 2018
url http://hdl.handle.net/10356/74965
_version_ 1759858361129500672