Effect on infill density on mechanical properties of PETG part fabricated by fused deposition modelling

Digital manufacturing method, in recent times has gained more interest among researchers from the academic world and manufacturing industry, as it is used to build 3D components. In additive manufacturing (AM) especially Fused Deposition Modelling (FDM) has witnessed a rapid development, is used for manufacturing parts from polymer and plastic materials straight away from a digital file. In FDM parts are made by melting, extruding and depositing layers one over the other. Part complexity does not affect the FDM fabrication but other process parameters namely infill density, layer thickness, raster angle, build orientation, air gap, etc., are taken into consideration for productivity. In this paper a study has been carried out to study the effect of infill density on the tensile strength and surface roughness of the FDM component made of Polyethylene Terephthalate Glycol (PETG) and keeping other parameters as constant. Specimens were printed as per the ASTM standard by varying the above mentioned process parameter. It has been observed that the individual process parameters have a considerable influence on the tensile strength and surface roughness of the PETG FDM fabricated parts.