| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Dynamic Behavior of Materials: Experiments and Molecular Dynamics Simulations
|
| Presentation Title |
Scaling up Molecular Dynamics Simulations of High Velocity Particle Impacts |
| Author(s) |
Aidan Moyers, Michael Becker, Desiderio Kovar |
| On-Site Speaker (Planned) |
Aidan Moyers |
| Abstract Scope |
Micro-cold spray (MCS) is a direct-write process that can produce patterned thick ceramic films (1-100 µm) onto a wide variety of substrates through repeated high velocity impacts of sub-micron particles. These impact conditions and particle sizes result in extreme strain rates (1e9-1e12/s) that are very challenging to study in situ or with continuum mechanics models, but they are well suited to molecular dynamics (MD) simulations. Most MD simulations of particle impacts have been conducted with 10 nm or smaller particles, allowing them to accurately simulate the atomic-scale behaviors responsible for deformation, but not permitting the reproduction of continuum-scale behaviors observed for the 100 nm to 1 µm particles used within physical experiments. This study seeks to bridge the gap between prior simulations and current experiments through with 3D MD simulations of 12-50 nm yttria (Y2O3) particles, as well as 2D simulations for particles up to 300 nm. |