Fused Filament Fabrication Additive Manufacturing: Mechanical Response of Polyethylene Terephthalate Glycol

  • O. Kohn School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel
  • Y. Rosenthal School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel
  • D. Ashkenazi School of Mechanical Engineering, Tel Aviv University, Ramat Aviv 6997801, Israel https://orcid.org/0000-0001-5871-1903
  • R. Shneck Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
  • A. Stern School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel & Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel https://orcid.org/0000-0002-8980-9214
DOI: https://doi.org/10.35219/awet.2021.06
Keywords: PETG polymer, additive manufacturing, fused filament fabrication, mechanical properties, tensile test, fractography

Abstract

The additive manufacturing (AM) fused filament fabrication (FFF) technology is widely used today with different kinds of thermoplastic materials, including polyethylene terephthalate glycol (PETG). One of the major problems of parts produced by AM-FFF technology is the anisotropy of their mechanical properties. Therefore, it is very important to understand the effect of build strategy and post-processing on the mechanical properties and failure behavior of the FFF-PETG components. This research aims to examine the influence of 3D-print orientations, post-processing heat treatments and reinforcement of the material with carbon fibers, on the mechanical properties of FFF-PETG specimens. For this purpose, three different standard building orientations, flat, one-edge and upright specimens were printed. Tensile testing was carried out to obtain the mechanical properties of the FFF-PETG specimens for the different 3D-print orientations and post-processing. The specimens were characterized by visual testing, stereo microscopy, and SEM microscopy to examine the fracture surface after tensile test. The upright-melted specimens reached the same tensile strength as the as-printed flat and on-edge orientations specimens. The fracture surface of all three orientations is brittle and it typically starts by a mirror pattern that evolves into cleavage plates.

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Published
2021-12-31
How to Cite
Issue
Vol 32 (2021)
Section
Articles

Papers accepted for publication become the copyrighted property of the Annals of "Dunarea de Jos" University of Galati, Fascicle XII, Welding Equipment and Technology. No part of the publication may be reproduced or transmitted in any form, or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, except in limited quantities for the non-commercial purposes of scientific or educational advancement, without permission in writing from the Editorial Board.