Effect of Printing Parameters On Mechanical Performance Of Fused Filament Fabrication (FFF) Parts

Yap, Jun Hong (2026) Effect of Printing Parameters On Mechanical Performance Of Fused Filament Fabrication (FFF) Parts. Final Year Project (Diploma), Tunku Abdul Rahman University of Management and Technology.

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Abstract

This final year project is about investigating the fused filament fabrication (FFF) technique in additive manufacturing (AM) and aims to determine optimal printing parameters using Taguchi method which are infill density and layer height using a recycled filament. The filament used throughout this project is recycled polyethylene terephthalate (rPET). The results show that a layer height of 0.28 mm and infill density of 60% produce the highest tensile strength for the three-dimensional (3D) printed parts. Thereafter obtaining the optimal printing parameters, the tensile properties of rPET are compared to commercial polyethylene terephthalate glycol (PETG) and polylactic acid (PLA). Among the tested 3D printed parts, PLA shows the highest elastic modulus, while PETG shows the highest tensile strength. Subsequently, the tensile strength and elastic modulus of rPET are analyzed using structural equation modelling (SEM) software, called SmartPLS, to find the path coefficient and evaluate how much the printing parameters influence the tensile properties. With layer height influencing the tensile strength the most with a total of 96.5% and the infill density influencing the elastic modulus with a total of 78.1%. This project was aligned with sustainable development goal (SDG) 12 (Responsible Consumption and Production), SDG 9 (Industry, Innovation and Infrastructure) and SDG 13 (Climate Action)