| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
A-69: Leveraging Spatial Gradation in Lattice Structure Development for Enhanced Energy Absorption from High Rate Loads |
| Author(s) |
David Pervis Failla, Haley E. Petersen, Matthew W. Priddy, Zackery B. McClelland |
| On-Site Speaker (Planned) |
David Pervis Failla |
| Abstract Scope |
This effort demonstrates the efficacy of strut diameter variation on the energy absorption capacity of additively manufactured (AM) body-centered cubic with Z-strut (BCCZ) stacked lattice structures for high-rate impact. By interchanging the internal geometry of a bulk part with lattice structures the failure mechanics of the lattice can be leveraged for stretch-dominated failure to increase energy absorption capacity or buckle-dominated failure for an increase in bulk strength with reduced weight. By combining finite element method predictions and results from experimental techniques, AM 316L BCCZ unit cell lattice structures fabricated via laser powder bed fusion are designed with independently varied strut diameters and characterized for high strain-rate applications. Down-selected unit cells were stacked to develop a column structure with functionally graded properties from increased strength to increased energy absorption through the height. The final optimized stack structure will demonstrate enhanced energy absorption for high rate loads with a favorable load-to-weight ratio. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Mechanical Properties |