| 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 |
Mechanical and Dimensional Characterization of Polymer Powder Bed Fusion Parts for Non-assembly Mechanisms |
| Author(s) |
Nava R Khatri, Johnathan A Smith, Paul Egan |
| On-Site Speaker (Planned) |
Paul Egan |
| Abstract Scope |
Polymer powder bed fusion (PBF) is promising for fabrication of non-assembly mechanisms in applications such as prosthetics needing rotational parts with mechanical strength. Here, PBF feasibility is studied for mechanical systems using a form fuse printing system with nylon 11 by printing and mechanically testing lattices, springs, and rotational mechanisms. Elastic moduli of specimens tested according to ASTM D638 type IV were about 43 MPa and demonstrated low anisotropy. BC-Cube lattices were printed at 30% and 50% relative densities with measured effective elastic moduli from 25 MPa to 55 MPa. Printed helical spring stiffness was approximately 0.2 N/mm to 16.8 N/mm for 3 mm to 7 mm wire diameters. Functional prosthetic fingers were operable for gap sizes printed within the range of 200 to 800 µm to avoid fusion of joints while enabling free rotation. Results demonstrate PBF’s feasibility for printing non-assembly parts for functional components in diverse engineering applications. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |