ERA

Download the full-sized PDF of Additive Manufacturing of Shape Memory Polymers: Effects of Print Orientation and Infill Percentage on Mechanical and Shape Memory Recovery PropertiesDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3JQ0T82J

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Additive Manufacturing of Shape Memory Polymers: Effects of Print Orientation and Infill Percentage on Mechanical and Shape Memory Recovery Properties Open Access

Descriptions

Other title
Subject/Keyword
Mechanical properties
Layered manufacturing
smart materials
Additive manufacturing
shape memory polyurethanes
Fused deposition modelling
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Villacres, Jorge Fernando
Supervisor and department
Dr. Cagri Ayranci (Department of Mechanical Engineering)
Dr. David Nobes (Department of Mechanical Engineering)
Examining committee member and department
Dr. Cagri Ayranci (Department of Mechanical Engineering)
Dr. Jason Caey (Department of Mechanical Engineering)
Dr. Mohtada Sadrzadeh (Department of Mechanical Engineering)
Dr. David Nobes (Department of Mechanical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2017-07-25T13:44:12Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
Material Extrusion Additive Manufacturing (MEAM), also known as Fused Deposition Modeling (FDM), is a manufacturing technique in which three-dimensional objects are built. These objects are built by repeatedly extruding thin layers of molten materials through a nozzle in different paths and depositing these layers until the desired object is formed. The shapes are defined by a computer aided design file. This manufacturing technique has become more user friendly and more available over the last decade, thus its uses and applications have risen exponentially. Shape Memory Polymers (SMP) are stimulus responsive materials which have the ability to recover their permanent form after being deformed to a temporary form. In order to induce its shape memory recovery, an external stimulus - such as heat - is needed. The manufacturing of SMP objects through a MEAM process has a vast potential for different applications; however, the mechanical and shape recovery properties of these objects need to be analyzed in detail before any practical application can be developed. As such, this project investigates and reports on the production and characterization of a shape memory polymer (SMP) material filament that is manufactured to print SMP objects using MEAM. To achieve consistent manufactured SMP filament, different parameters of the raw materials were analyzed and a production line for SMP filaments was established. Having a defined filament production line facilitated the manufacture of SMP filaments with consistent characteristics. Additionally, the effects of major printing parameters, such as print orientation and infill percentage, on the mechanical (elastic modulus, ultimate tensile strength and maximum strain) and shape recovery properties of MEAM-produced SMP samples were investigated and outlined. The analyzed shape recovery properties were: recovery force, recovery speed and time elapsed before activation. Results show that print angle and infill percentage do have a significant impact on the mechanical and shape recovery properties of the II manufactured test sample. For elastic modulus, ultimate tensile strength, maximum strain, shape recovery time and shape recovery force an increase in infill percentage increases their value. On the contrary, increasing infill percentage decreases shape recovery speed. Moreover, an increase in print angle decreases elastic modulus and ultimate tensile strength. In contrast, maximum strain shape recovery speed and shape recovery force increased when increasing print angle. Shape recovery time didn’t seem affected the change in print angle. Findings can significantly influence the tailored design and manufacturing of smart structures using SMP and MEAM.
Language
English
DOI
doi:10.7939/R3JQ0T82J
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
ASTM, 2015. Standard Test Method for Tensile Properties of Plastics, s.l.: DESIGNATION: D638 - 14.Chia, H. & Wu, B., 2015. Recent advances in 3D printing of biomaterials. Journal of Biological Engineering, pp. 2-14.Gibson, I., 2017. The changing face of additive manufacturing. Journal of Manufacturing Technology Management, 28(1), pp. 10-17.Gibson, I., Rosen, D. & Stucker, B., 2015. Additive Manufacturing Technologies. New York: Springer.Guo, J. et al., 2015. Shape memory and thermo-mechanical properties of shape memory. Composites, pp. 162-165.Hager, M., Bode, S., Weber, C. & Schubert, U. S., 2015. Shape memory polymers: Past, present and future. Progress in Polymer Science, pp. 3-33.Khoo, Z. X. et al., 2015. 3D printing of smart materials: A review on recent progresses in 4D printing. Virtual and Physical Prototyping, 10(3), pp. 103-122.Lendlein, A. & Kelch, S., 2002. Shape Memory Polymer. In: Shape Memory Effect. Teltow: Wiley, pp. 2034-2037.Liu, C., Qin, H. & Mather, P., 2007. Review of progress in shape-memory polymers. Journal of Materials Chemistry, Volume 17, pp. 1543-1558.Montgomery, D., 2013. Design and Analysis of Experiments. Tempe: Wiley.Raasch, J. et al., 2015. Characterization of polyurethane shape memory polymer processed. Additive Manufacturing, pp. 132-141.Rauwendaal, C., 2014. Polymer Extrusion. Munich: Hanser.SMP Technologies, 2012. Shape Memory Polymer. [Online] Available at:  http://www2.smptechno.com/en/smp/
[Accessed February 2016].Tadmor, Z. & Gogos, C., 2006. Principles of Polymer Processing. Hoboken : Wiley.Tamagawa, H., 2010. Thermo-responsive two-way shape changeable polymeric laminate. Materials Letters, pp. 749-751.Tymrak, B., Kreiger, M. & J.M.Pearce, 2014. Mechanical Properties of Components fabricated with open source 3-D printes under realistic environmental conditions. Materials and Design, Volume 58, pp. 242-246.Ultimaker, n.d. Ultimaker 2+ Speceifications. [Online] [Accessed 06 2016].Wong, K. & Hernandez, A., 2012. A Review of Additive Manufacturing. ISRN Mechanical Engineering, Volume 2012, p. 10.Wu, W. et al., 2015. Influence of Layer Thickness and Raster Angle on the Mechanical Properties of 3D-Printed PEEK and a Comparative Mechanical Study between PEEK and ABS. Open Access Materials, Volume 8, pp. 5835-5846.Yang, Y., Chen, Y., Wei, Y. & Li, Y., 2015. 3D printing of shape memory polymer for functional part fabrication. Advanced Manufacturing Technologies.Zhang, C.-S. & Ni, Q.-Q., 2005. Bending behavior of shape memory polymer based laminates. composite structures, pp. 153-156.

File Details

Date Uploaded
Date Modified
2017-07-25T19:44:13.660+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (PDF/X)
Mime type: application/pdf
File size: 4544320
Last modified: 2017:11:08 17:23:33-07:00
Filename: Villacres_Jorge_F_201706_Msc.pdf
Original checksum: 0698bd7b000c03b5c6781a5ce65e32e0
Activity of users you follow
User Activity Date