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 |
Influence of layer thickness and nozzle temperature on the interlocking adhesion strength of additive manufactured multi-material interface |
Author(s) |
Fangkai Xue, Guillaume Robin, Hakim BOUDAOUD, Fabio Alberto.Cruz Sanchez, El Mostafa Daya |
On-Site Speaker (Planned) |
Fangkai Xue |
Abstract Scope |
Achieving adequate adhesion strength at multi-material interfaces is always a challenge in material extrusion additive manufacturing (MEAM), especially when the materials have very different chemical affinities. This study investigated the adhesion mechanism of multi-material interfaces in MEAM from a micro-geometric perspective. The horizontally printed interface was found to have a smooth surface, while the vertically printed interface had a micro-zigzag interlocking geometry. The formation of this micro-zigzag interlock is due to the switching of extruders during printing, which mechanically reinforces the interface adhesion strength. Using butt-joint tensile tests and microscope observation, it was found that the geometry of this zigzag interlock is significantly influenced by the layer thickness, nozzle temperature and extruder offset. By optimizing these three parameters, the interface adhesion strength between dissimilar materials was doubled without significantly increasing the printing time or fabrication complexity. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |