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Mümin TUTAR, Kenan TÜFEKÇİ
ANISOTROPY OF ADDITIVELY MANUFACTURED COMPRESSION SAMPLES
 
One of the most common additive manufacturing methods today is material extrusion. This method, which generally uses thermoplastic polymers, is used both by home users and in industries such as automotive, aerospace and machinery, especially in the production of prototype parts. Certain mechanical properties are expected from the parts produced by this method, even if they are prototypes. Process parameters such as layer height, nozzle temperature, infill density and pattern are used to achieve the desired mechanical properties. Especially the infill density and pattern have great importance on the strength and flexibility of the part. The fact that the production is layer by layer causes the produced part to show anisotropic properties naturally, and this anisotropy causes the usage areas of the part to be limited. The direction-dependent properties can be caused by movements in the X-Y-Z directions of the printer and the geometry of the infill structure. There are different applications where the infill pattern is arranged in three dimensions to eliminate the anisotropy caused by the fill pattern. In this study, the direction dependence of the mechanical properties of parts produced by additive manufacturing is investigated through compression tests. For this purpose, 2D (Cross) and 3D (Cross3D) cases of the same infill pattern geometry and the effects due to the X and Z directions of the 3D printer were analyzed. For both 2D and 3D infill patterns, the Z directions exhibited approximately 3 and 1.3 times greater strength than the other directions, respectively. The load carrying capacities of the X and Y directions for both infill patterns are approximately the same. When Z directions were evaluated for two different groups, the 2D filling pattern showed approximately 1.7 times more strength than the 3D pattern. ORCID NO: 0000-0002-7286-3433

Anahtar Kelimeler: Additive manufacturing, Anisotropy, Infill pattern, Compression test



 


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