About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
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| Presentation Title |
Atomic Structure Dependence of Mesoscale Plastic Shear Localization |
| Author(s) |
Thanh Phan, Yang Su, Khanh Dang, Josh Kacher, Laurent Capolungo, Liming Xiong |
| On-Site Speaker (Planned) |
Liming Xiong |
| Abstract Scope |
Plastic shear localization associated with dislocation channeling, deformation twinning, martensitic phase transformation, and so on, is responsible for the failure of many materials. Such localization often initiates at grain boundaries (GBs), propagates across the micron-sized grain, ends at the opposite GB, and then triggers plastic deformation in the adjacent grain. It remains challenging if one relies on single-scale methods to model such phenomena because: (a) continuum models often ignore the GB structure; while (b) atomistic models retain a high resolution at the GB but cannot accommodate long-range internal stresses. In this talk, we will introduce recent development of a concurrent atomistic-continuum simulation tool to: (i) accommodate the microscale dislocation slip, twin nucleation, growth, propagation, and their interactions with the atomically structured GB all in one model; and (ii) characterize local stress associated with these interactions and its role in subsequent deformation modes selection from atomic to mesoscale. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Mechanical Properties |