The Effect of Infill Angle and Build Orientation on the Impact Strength and Production Time of Porous Infill Structure Vincent Wibisono, The, Jaya Suteja, Hudiyo Firmanto
Mechanical and Manufacturing Engineering Department, University of Surabaya
Raya Kalirungkut, Surabaya
Abstract
In developing a lightweight structure, the density of the structure can be reduced by converting a solid structure to a porous infill structure. Previous research had investigated that a triangular infill structure has the highest impact strength compared to other infill patterns. However, the impact strength of this structure may still be improved by adjusting other parameters without extending the time of production. This research goal is to investigate the effect of the build orientation and infill angle on the impact strength and the production time of the triangular infill structure. To achieve the goal, this research uses a 3D printing process to manufacture a triangular infill structure made of Polylactic Acid. Seven levels of infill angle and two levels of build orientation are used to find the effect. In this experiment, twenty-six Charpy Impact specimens are printed using the Fused Deposition Modelling machine. Each specimen is printed according to ISO 179 standard and tested by using a GT-7045 impact testing machine to measure the impact strength of the specimen. The results of this experiment indicate that the resistance of the on-edge build orientation to the impact load is better than the flat build orientation. The on-edge build orientation type requires less time to print compared to the flat build orientation type for each infill angle. The use of a 45-degree infill angle exhibits the highest impact resistance. To achieve the shortest time to print, the 0-degree infill angle is recommended.
Keywords: infill angle, build orientation, impact strength, production time, porous infill structure
