Acrylonitrile butadiene styrene (ABS) specimens manufactured by fused deposition are tested under uniaxial compression in order to judge the effectiveness of printing orientation, density, and filler patterns in terms of stiffness and strength per printing time. The compressive properties of the 3D printed materials along the three orthogonal directions are studied on cylindrical specimens filled with honeycomb and rectangular patterns. In order to achieve different densities, five filler percentages (0, 20, 30, 40, and 100%) are employed for each type of structure. Specimens filled with honeycomb patterns are stiffer and stronger than those with rectangular patterns only when they are oriented along the applied load. However, structures with rectangular patterns only require roughly half of printing time of those filled honeycomb cells, which yields effective rectangular structures with high elastic properties per printing time. Stress–strain curves reveal that compressive strength and stiffness increase with respect to the structure density. Patterns printed along the loading direction present higher strength and stiffness than on the other orthogonal orientations. Local buckling and compressive failure mechanisms are identified for light weight and heavy structures, respectively. A combination of shear and local buckling failure appeared in honeycomb structures printed transversely with relative densities around 20–40%.
The International Journal of Advanced Manufacturing Technology – Springer Journals
Published: Nov 13, 2017
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