The research paper
In this investigation, the tensile properties of Polyethylene Terephthalate Glycol (PETG) 3D-printed
dumbbells with differing internal infill structure were assessed to classify the necessary geometry for the
optimisation of the functionality of a part. The test pieces were subjected to increasing uniaxial loads under
tension to generate a stress-strain curve, and thereby data for the associated properties, for each specific
infill pattern. Hence, a comparison between the strengths of the various patterns is drawn to identify brief
criteria for the selection of the optimal infill structure in specific applications. It was found that the zig-zag
infill pattern could take the greatest load without yielding under the application of a uniaxial tension.
Paul A. Karavaikin
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