About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
The effect of dislocation nucleation spacing on the dislocation network formed during plastic shock of aluminum |
| Author(s) |
Cameron J. Frampton, Andre Archer, Douglas Spearot |
| On-Site Speaker (Planned) |
Cameron J. Frampton |
| Abstract Scope |
Shock is a phenomenon involving high strain rate that occurs in a wide range of applications including aerospace, nuclear, and laser processing. Simulating shock using Discrete Dislocation Dynamics (DDD) can provide a better understanding of how the spacing associated with dislocation nucleation is related to the plastic wave morphology. This will be done by applying a wave of stress in the form of a hyperbolic tangent which will be motivated from molecular dynamics simulations. Dislocation loops will then be placed in the stress wave at a given time frequency. The objective of this work is to determine the dislocation nucleation spacing necessary to generate a stable dislocation network microstructure at a given ramp time and pressure. The resulting networks are characterized by dislocation density and junction evolution during relaxation. Virtual X-ray Diffraction (XRD) is also performed to make comparisons to experimental XRD. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Other |