About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Rheology-Informed Mixture Engineering of Aggregates for Extrusion Additive Manufacturing |
Author(s) |
S U M Rabbi Hossain, Timothy Moore, Philip King |
On-Site Speaker (Planned) |
S U M Rabbi Hossain |
Abstract Scope |
This work is motivated by the idea that any material that can be processed into granules and bonded together can be printed. This study investigates the rheological behavior of aggregate materials during extrusion. A ceramic media with three different particle size distributions is used to examine how binder interactions and rheological property modifiers influence deformation and flow behavior under load. A custom-built extrusion rheometer characterizes material response through extrusion force, yield stress, pressure-displacement relationships, and flow consistency. Rheological modifiers and binders are also evaluated to enhance cohesion, flow stability, and counteract the material’s inherent shear-thickening behavior by introducing shear-thinning characteristics that facilitate continuous extrusion. The results demonstrate the impact of particle size on flow resistance and identify formulation-dependent parameters that govern extrudability. This work lays the foundation for rheology-informed design of printable materials, enabling adaptive extrusion platforms that can print a diverse range of materials. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |