About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
A Multiscale Finite Element Analysis of the Dynamic Fragmentation of Additively Manufactured Porous Metal Rings |
| Author(s) |
Caleb Foster, Justin Wilkerson, José Rodríguez-Martínez |
| On-Site Speaker (Planned) |
Caleb Foster |
| Abstract Scope |
Dynamic fracture of additively manufactured porous metals under high loading rates is strongly influenced by microstructural void morphology. However, integrating this morphology into large-scale simulations remains a challenge, as explicitly resolving the entire porous microstructure is computationally prohibitive. This study develops a computational homogenization method that incorporates the size and spatial distribution of voids—measured via experimental tomography—into finite-element models of additively manufactured AlSi<sub>10</sub>Mg rings subjected to rapid radial expansion and fragmentation. The method converts microstructural morphology into a single initial porosity variable which spatially varies across the ring-shaped specimen. The approach shows reasonable agreement with fragmentation experiments for high strain rates, offers a significant reduction in computational time compared to calculations that explicitly resolve the porous microstructure, and shows marked improvement over simulations assuming spatially-homogeneous porosity. These results demonstrate its suitability for rapid preliminary evaluations in engineering design and swift prediction of dynamic fracture in additively manufactured structures. |