About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Functionally Graded TPMS Lattice Structures Optimized to Improve Mechanical Performance for Biomedical Applications |
Author(s) |
Kaitlyn Hartman, Sy Nguyen-Van, Lan-Hsuan Huang, Matthew Lear, Julian Norato, Guha Manogharan |
On-Site Speaker (Planned) |
Kaitlyn Hartman |
Abstract Scope |
In this study, the mechanical strength of functionally graded Ti-6Al-4V TPMS beams fabricated with laser powder bed fusion (LPBF) is investigated through mechanical flexural testing (with digital image correlation (DIC)), finite element analysis (FEA), microstructural and morphological characterization, and thorough evaluation of fracture mechanisms. This study compares three variations of optimized gyroid-filled lattice beams for mechanically driven objective functions and varied sheet thickness, with constant volume fraction among beams: uniform, stress-based gradation, and compliance-based gradation. Findings show that the functionally graded beams (both stress-based and compliance-based) outperform the uniform beams mechanically for both unit cell sizes. The optimized beams redistributed regions of high stress to maintain a more uniform strain distribution across the beam, allowing these beams to withstand higher loads for a longer time. This research opens doors to utilizing the functional gradation of lattice structures to obtain desired mechanical properties for a variety of biomedical applications. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |