Evaluation and Comparison of Mechanical Properties of PETG and CF - PETG Fabricated using FDM Process of Additive Manufacturing

The utilization of Additive Manufacturing (AM) technology in the current manufacturing sector is growing day - by - day. This is made possible by the constant development of new materials and techniques to overcome the difficulties that are encountered while fabricating a part. In AM, parts are fabricated by laying successive layers on one another till the complete part is build. This gives AM an edge over conventional manufacturing. Even intricate or hollow parts can be fabricated with the same ease as fabricating a solid part. The key objective of this project is to evaluate and compare mechanical properties of Polyethylene Terephthalate - Glycol modified (PETG) and Carbon fiber reinforced Polyethylene Terephthalate - Glycol modified (CF - PETG), which are fabricated using Fused Deposition Modelling (FDM) process of AM. The ASTM standards D638 and D790 were followed for fabricating tensile test and Flexural test specimens respectively. Subsequently, fractured specimens are analyzed using Scanning Electron Microscope (SEM) for a better understanding of fracture. The results show a ductile fracture in PETG specimens, the flexural strength of CF - PETG is significantly higher than that of PETG, the tensile strength of PETG and CF - PETG are comparable.