Abstract
The objective of this study was to determine mechanical properties of two models of hypercubes defined as Type 1 (core-filled) and Type 2 (core-spaced) made with direct metal laser sintering (DMLS) method. To manufacture these models, aluminum alloy AlSi10Mg powder was used. Each model was created by adding consecutive layers vertically with DMLS. After quasi-static compression, Type 1 model had 19% higher elastic modulus, 12% higher compressive yield strength, and 51.6% greater elongation than Type 2 model. From our experiments, we found that the following two factors could weaken these models. First, metals melted by DMLS were not connected to each other securely. Second, anisotropy in specimens created by DMLS was a significant factor that affected their stiffness and strength. These two models could be utilized in a sandwich core structure. Further studies are needed to investigate their bending and shear properties more deeply. Upgraded 3D printing technologies in the future might help us make more precise, complex structures.
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