Investigation of the Effects of FDM Process Parameters on the Mechanical Properties of ۳D-Printed PETG Parts Using Full Factorial Design

Controlling the parameters of the fused deposition modeling (FDM) process is crucial for producing high-quality parts with desirable properties. This study investigates the influence of main FDM process parameters, including layer thickness (LT) and infill percentage (IP) on the weight (W), maximum failure load (MFL), and the ratio of MFL to W of ۳D-printed polyethylene terephthalate glycol (PETG) parts fabricated using the fused deposition modeling (FDM) method. The tests are designed based on the full factorial design of the experiment method. The infill percentage was investigated at two levels of ۶۰ and ۹۰%, and the layer thickness at two levels of ۰.۱ and ۰.۲ mm. The results indicate that increasing the layer thickness and infill percentage significantly enhances the weight, maximum failure load, and MFL-to-W ratio of the parts. Among the two parameters, the infill percentage showed a greater impact on the output responses compared to layer thickness. The highest MFL (۵۰۴ N) and weight (۵.۴۲ g) were achieved with a layer thickness of ۰.۲ mm and an infill percentage of ۹۰%. The highest ratio (۹۲.۹۸ N/g) is achieved at the highest infill percentage (۹۰%) and layer thickness (۰.۲ mm), whereas the lowest ratio (۶۰.۲۹ N/g) is observed at the lowest infill percentage (۶۰%) and layer thickness (۰.۱ mm).

کلیدواژه ها:

Fused deposition modeling ، “Full factorial design ، “Polyethylene terephthalate glycol ، Mechanical properties.