About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Interlayer Mechanical Properties of Thermoset Components Produced by Material Extrusion Additive Manufacturing |
Author(s) |
Jonathan Taulo Pedersen-Bjergaard, Mathias Michael Christensen, Marco Brander, Berin Seta, David Bue Pedersen, Jon Spangenberg |
On-Site Speaker (Planned) |
Jonathan Taulo Pedersen-Bjergaard |
Abstract Scope |
Material extrusion additive manufacturing (MEX-AM) with thermosets has recently received interest as its material properties are appropriate for many applications. However, it is still not fully understood how the layer-by-layer technique applied in MEX-AM affects the interlayer mechanical properties. In this study, a robot arm with accompanying dispensing system is used to 3D print a two-component polyurethane with different deposition strategies (i.e., varying holding intervals between layers) in order to investigate its effect on the interlayer-stiffness and –strength. The material is extruded through a 7 mm nozzle to fabricate 42 mm high walls with a width equal to a single strand. The degree of isotropy is measured through tensile testing of dogbone samples that are milled parallel and orthogonal to the print direction thereby quantifying the bulk- and interlayer-mechanical properties, respectively. The results illuminate the importance of choosing a printing strategy that limits the reduction in interlayer-stiffness and –strength. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |