About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Dislocation-Induced Ductile Fracture and the Underlying Processes |
| Author(s) |
Boyang Gu, Yang Li, David L McDowell , Youping Chen |
| On-Site Speaker (Planned) |
Youping Chen |
| Abstract Scope |
The idea that dislocation pileups can cause a crack to form can be traced back to 1948 when Zener noted that a blocked slip line resembles a freely slipping crack under a shear stress and to 1953 when Mott suggested that the stress concentration around piled-up dislocations is sufficient to initiate a crack. The idea was then mathematically investigated by Stroh and by Cottrell in 1950s, followed by many experimental confirmations. Due to the complexity of the problem, however, a quantitative understanding remains lacking, and the phenomenon has not been reproduced by simulation. This talk presents Concurrent Atomistic-Continuum simulations and visualizations of the processes underlying the phenomenon. The formation of cracks as a result of dislocation pileups at the intersection of slip planes is observed, providing a quantitative understanding of the connection between dislocation structure, local stress, and cleavage planes as well as mechanistic insights into dislocation-induced ductile fracture. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Mechanical Properties |