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EXPERIMENTAL INVESTIGATION ON THE MECHANICAL PROPERTIES OF 3D PRINTED STRUCTURAL POLYMER MATERIALS

In recent years, additive manufacturing has become one of the most used methods of polymer parts manufacturing, especially Fused Deposition Modelling (FDM). Wide range of commercial polymer materials can be applied, with high print quality, using low cost open-source 3D Printers. However, due to lack of information on the mechanical properties of 3D printed materials, aim is to investigate the same. Tensile strength experimental tests were performed on specimens made of Tough PLA, ABS, and nylon PA 6/66, using in-house developed test rig. The specimens were designed and printed according to specimen standard ISO 527:2012. Also, due to polymer viscoelastic and viscoplastic properties, creep (cold flow) tests were performed, using in-house developed creep testing machine, for better understanding of 3D printed polymer behavior at elevated temperatures. Finally, the characterization of 3D printed materials was performed by analyzing the results obtained by testing.

Polymers ; Mechanical properties ; Tensile Strength ; Creep ; 3D Printing

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