| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
|
| Presentation Title |
Energy Dissipation Mechanisms and Role of Porosity in Shock Loaded Niobium: A Molecular Dynamics Study |
| Author(s) |
William Zummo, Chunyu Li, Alejandro Strachan |
| On-Site Speaker (Planned) |
William Zummo |
| Abstract Scope |
The role of microstructure and defects on shockwave energy dissipation and spall failure are not fully understood. We use large-scale non-equilibrium molecular dynamics to study the shock loading, energy dissipation characteristics, and spall failure of single crystal niobium samples with pores of different sizes and densities. A detailed analysis of the MD trajectories provides insights into the mechanisms associated with void collapse and the resulting energy dissipation. In addition, we characterize how microstructure resulting from the collapse of porosity affects spall strength and failure of a material. Increasing porosity leads to competing effects of enhancing energy dissipation while at the same reducing spall strength. The results can contribute to the design of materials for protection against ballistic impact and for applications involving dynamical loading. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, |