149
IRUS Total
Downloads
  Altmetric

Investigating the role of infill structures on the shape memory effect of shape memory polymers in additive manufacturing

File Description SizeFormat 
Choi-J-2021-PhD-Thesis.pdf20.06 MBAdobe PDFView/Open
Title: Investigating the role of infill structures on the shape memory effect of shape memory polymers in additive manufacturing
Authors: Choi, Jiwoo
Item Type: Thesis or dissertation
Abstract: Additive Manufacturing (AM) enables designers and engineers to embed functions into printed objects by its unique advantages. This means a product, or component, which performed a specific purpose can be embedded into another part. One way of embedding functions in AM is through the use of Shape Memory Polymer (SMP). SMP is the material that reacts to a stimulus and changes shape. Using smart material's unique properties, 3D printed objects can be transformed following intended programmed sequences. Another way to embed the function into 3D printed objects is through the use of Metamaterial (also called smart structure). Metamaterial uses the smartly designed internal movement to embed function and derives unique properties from smartly designed structures. This thesis investigates the effect of infill structure on the Shape Memory Effect (SME) of SMPs. By comparing various infill structures (e.g., infill patterns and internal void), the impact on SME was explored. Previously, several studies successfully programmed SME by altering printing parameters such as infill density or filling angles. However, only limited studies were performed with Material extrusion 3D printing technology, and correlations between SME and infill structure has not fully explained yet. Therefore, this study will primarily aim to study how infill-patterns or partial parts of infill structures change SME. Various infill structures are fabricated while maintaining the same external object geometry, to explore their impact on SME. It is shown that SME can be controlled without any requirement to change materials or external geometrical parameters. This enables us to embed various SME into objects all made from the same material.
Content Version: Open Access
Issue Date: Jul-2021
Date Awarded: Nov-2021
URI: http://hdl.handle.net/10044/1/93384
DOI: https://doi.org/10.25560/93384
Copyright Statement: Creative Commons Attribution NonCommercial Licence
Supervisor: Myant, Connor
Wu, Billy
Department: Dyson School of Design Engineering
Publisher: Imperial College London
Qualification Level: Doctoral
Qualification Name: Doctor of Philosophy (PhD)
Appears in Collections:Design Engineering PhD theses



This item is licensed under a Creative Commons License Creative Commons