The tensile strength of samples made by FDM technology from PLA and PLA with different fillers (aluminum oxide, copper, carbon fiber) was investigated. FDM process parameters (raster angle, layer thickness and number of shells) were optimized using ANOVA test. It was found that the raster angle is the most influential parameter. Tensile strength increases as the raster angle increases and the number of shells as well as layer thickness (larger number of infills) decreases. The highest strength was achieved for PLA/PLA-Al2O3.
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Appusamy et al. (2024) studied this question.
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