| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
3D Printed Intelligently Graded Functional Stiffness Foam for Sturdier Multi Stiffness Materials |
| Author(s) |
Brett Alexander Emery, Daniel Revier , Masa Nakura, Vivek Sarkar, Jeffrey Lipton |
| On-Site Speaker (Planned) |
Brett Alexander Emery |
| Abstract Scope |
Foams are ubiquitous, being used in applications such as padding, insulation, and noise isolation. Bonding different density foams together produces undesired stress concentrations and boundary effects. Creating controlled gradients in foam properties has been a challenge for traditional and AM processes. Here we show how to use a form of material extrusion called viscous thread printing (VTP) to produce foams with multiple stiffnesses and continuous gradients between different stiffnesses. We do so by varying the path speed during extrusion to control the production of microstructures. We compare the process of producing discrete components and those with gradients, showing that those with gradients have higher strength in plane during tension, have no discontinuities in out of plane stiffness, and are less prone to forming cracks at the boundaries. We demonstrate the process in thermoplastic polyurethane (TPU). |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |