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research-article

Evaluating Mechanical Properties and Failure Mechanisms of Fused Deposition Modelling ABS Parts

[+] Author and Article Information
M. S. Uddin

School of Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia
mohammad.uddin@unisa.edu.au

Muhammad Fakhrul Sidek

School of Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia
sidmy006@mymail.unisa.edu.au

Mohd Ameerul Faizal

School of Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia
merul_89@yahoo.com

Reza Ghomashchi

School of Mechanical Engineering, University of Adelaide, Adelaide, SA 5005, Australia
reza.ghomashchi@adelaide.edu.au

Alokesh Pramanik

Department of Mechanical Engineering, Curtin University, Bentley 6845, WA, Australia
alokesh.pramanik@curtin.edu.au

1Corresponding author.

ASME doi:10.1115/1.4036713 History: Received November 02, 2016; Revised May 01, 2017

Abstract

This paper presents a comprehensive experimental study in exploring the influence of key printing parameters on mechanical properties and failure mechanisms of ABS material. Three parameters with three levels - layer thickness (0.09, 0.19 and 0.39 mm), printing plane (XY, YZ and ZX) and printing orientation (Horizontal, Diagonal and Vertical) are considered. Tensile and compression specimens are fabricated and tested. Young’s modulus, yield strength, failure strength, and strain of specimens are measured, evaluated and compared with their injection moulded counterparts. Results indicate that tensile specimens with a layer thickness of 0.09 mm and printing plane-orientation YZ-H reveal the highest stiffness and failure strength. While injection moulded specimen shows the highest yield strength, ductility of printed specimens is 1.45 times larger than that of injection moulded part. YZ along with XY specimens show a neat and clean standard fracture failure at 45°, where the layers reorient themselves followed by stretching before fracture failure, thus providing sufficient ductility as opposed to ZX specimens which fail along the direction perpendicular to the loading. Compressive XY-H and XY-D specimens have the highest stiffness and yield strength, and their failure mechanisms involve initial compression followed by squeezing of layers leading to compactness followed by breakage due to tearing off or fracture of layers. The findings imply that anisotropy of FDM parts cannot be avoided and hence the appropriate parameters must be chosen which satisfy the intended properties of the material subject to specific loading scenario.

Copyright (c) 2017 by ASME
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