TITLE:
The Effects of Build Parameters and Strain Rate on the Mechanical Properties of FDM 3D-Printed Acrylonitrile Butadiene Styrene
AUTHORS:
Kemar Hibbert, Grant Warner, Celeste Brown, Olusegun Ajide, Gbadebo Owolabi, Amin Azimi
KEYWORDS:
Build Parameters, Mechanical Properties, Additive Manufacturing, 3D Printing, Acrylonitrile Butadiene Styrene
JOURNAL NAME:
Open Journal of Organic Polymer Materials,
Vol.9 No.1,
January
31,
2019
ABSTRACT:
In this paper, the effects of build parameters on
the mechanical properties of 3D-printed acrylonitrile butadiene styrene (ABS)
produced using fused deposition modeling (FDM) are investigated. Full factorial
experimental design incorporating a 2-level, 3-factor design with raster angle,
layer thickness and interior fill style was carried out. Tensile tests were
performed at four different strain rates to determine how the build parameters
influence the mechanical properties of the 3-D printed ABS and to assess its
strain rate sensitivity under quasi-static loading. It was found that the
modulus of toughness of ABS material is most influenced by raster angle, while
the interior fill style is the most dominant build parameter that dictates the
specimen’s modulus of resilience, yield strength and ultimate tensile strength.
At all strain rates, it is further revealed that higher mean values of yield
strength, ultimate tensile strength and modulus of resilience were obtained
when the interior fill style is solid as opposed to high density. This can be
attributed to the denser structure and higher effective cross-sectional area in
solid interior fill style in comparison with high density interior fill style.
However, the influence of the layer thickness on the investigated mechanical
properties was found to be inconsistent. It was noted that specimens built with
both 0.254 mm layer thickness and the cross [0°/90°] raster angle had superior
mechanical properties when compared to those built with the 0.3302 mm layer
thickness and cross [0°/90°] raster angle. This suggests that there is a key
interaction between the layer thickness and the raster angle. At any FDM build
parameter, it was found that all the mechanical properties investigated in this
work exhibited modest sensitivity to strain rates. This study has provided a
platform for an appropriate selection of build parameters combinations and
strain rates for additive manufacturing of 3D-printed ABS with improved
mechanical properties.