Browsing by Subject "Fracture Toughness"

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Effect of Section Thickness and Build Orientation on Tensile Properties and Material Characteristics of Laser Sintered Nylon-12 Parts
(University of Texas at Austin, 2010) Majewski, C.E.; Hopkinson, N.
It has been suggested that different section thicknesses in Laser Sintered parts may cause variations in mechanical properties, and this has previously been demonstrated for some properties (e.g. fracture toughness). The research presented here investigates whether the same is true of tensile properties, and whether the orientation of parts within the build volume has any effect on this. Results are presented for three different orientations of tensile specimens, at a range of thicknesses from 2mm to 6mm, showing that, at any of the orientations tested, the section thickness had no significant effect on any of the main tensile properties. These results are in direct contradiction with related research investigating the effect of section thickness on Fracture Toughness, where an increase in thickness also increased the toughness of the parts. This highlights the importance to Additive Manufacturing users of identifying the correct properties to assess when choosing a suitable process or material, and when designing complex parts.