Fatigue Performance of ABS Specimens Obtained by Fused Filament Fabrication.

Miquel Domingo-Espin,Ramon Jerez-Mesa,Jordi Lluma-Fuentes,J Antonio Travieso-Rodriguez

doi:10.3390/ma11122521

Miquel Domingo-Espin, Ramon Jerez-Mesa + Show 2 more

Open Access

https://doi.org/10.3390/ma11122521

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Journal: Materials	Publication Date: Dec 11, 2018
Citations: 72	License type: CC BY 4.0

Affiliation: Universitat Politècnica de Catalunya

Abstract

In this paper, the fatigue response of fused filament fabrication (FFF) Acrylonitrile butadiene styrene (ABS) parts is studied. Different building parameters (layer height, nozzle diameter, infill density, and printing speed) were chosen to study their influence on the lifespan of cylindrical specimens according to a design of experiments (DOE) using the Taguchi methodology. The same DOE was applied on two different specimen sets using two different infill patterns—rectilinear and honeycomb. The results show that the infill density is the most important parameter for both of the studied patterns. The specimens manufactured with the honeycomb pattern show longer lifespans. The best parameter set associated to that infill was chosen for a second experimental phase, in which the specimens were tested under different maximum bending stresses so as to construct the Wöhler curve associated with this 3D printing configuration. The results of this study are useful to design and manufacture ABS end-use parts that are expected to work under oscillating periodic loads.

Highlights

Additive manufacturing (AM) technologies were, for years, considered only to manufacture prototypes, not end-use or functional objects
The results showed that the most influential factor in the signal was the infill density, for both of the infill patterns (42.2% for rectilinear and 72.4% for honeycomb), as it happened in the previous study done for polylactic acid (PLA) material [41]
The results showed that the highest lifespan, using the rectilinear infill pattern, was obtained when layer height, nozzle diameter, and infill density were at their highest level

Summary

Introduction

Additive manufacturing (AM) technologies were, for years, considered only to manufacture prototypes, not end-use or functional objects. Since the growth of the industry in the past years due to the improvement in technologies, the increasing quantity of materials, and the ease of access to the technologies, interest in manufactured functional parts has increased [1]. In order to manufacture a 3D object with AM, a virtual design is needed. The virtual design is done using computer aided design (CAD) software. After modeling the CAD file, the geometry is exported to an STL file, which describes the surface geometry of a three-dimensional object without any representation of color, texture, or other common model attributes. The STL file must be prepared before it is 3D printed, as it must be sliced. Slicing is dividing the 3D model into the horizontal layers that the printer will stack to form the part

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