Effects of raster angle on tensile and surface roughness properties of various FDM filaments

• Published in: Journal of mechanical science and technology Vol. 35; no. 8; pp. 3347 - 3353
• Main Author: Çakan, Betül Gülçimen
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01.08.2021; Springer Nature B.V; 대한기계학회
• Subjects: Control; Ductile fracture; Dynamical Systems; Engineering; Failure mechanisms; Filaments; Fused deposition modeling; Industrial and Production Engineering; Interlayers; Mechanical Engineering; Original; Original Article; Parameters; Rapid prototyping; Raster; Surface roughness; Ultimate tensile strength; Vibration; 기계공학; Raster angle; Surface roughness; Tensile properties; 3D printing
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-021-0708-8

Parts produced by FDM (fused deposition modelling) technique, where polymer filaments are used, are anisotropic and their properties vary depending on the printing parameters, one of which is raster angle. In this study, the effects of this parameter on the tensile and the surface roughness properties were investigated. It was determined that the ultimate tensile strength (UTS) decreased with increasing raster angle; hence, 0° raster angle where tensile loading direction is parallel to the raster yielded the highest strength. Besides ±45° raster angle resulted the most ductile behaviour with the highest fracture strains. Fracture occurred due to raster failure for 0° raster angle but for 90° raster angle, it was due to the failure of the interlayer raster bonds. In the case of ±45°, both of the failure mechanisms were effective. Surface roughness values increased up to 7 µm when measurement was perpendicular to the raster and dropped below 1 µm when it was parallel to the raster.