About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
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| Presentation Title |
Four-Dimensional Reconstruction of Plastic Strain Localization From Surface-Velocity Measurements |
| Author(s) |
Junjie Yang, Tamer Zaki, Jaafar A. El-Awady |
| On-Site Speaker (Planned) |
Jaafar A. El-Awady |
| Abstract Scope |
Experimental techniques remain fundamentally limited in their ability to probe the evolution of large dislocation ensembles and to quantify the mechanisms that drive plastic strain localization. Advanced surface measurement technologies, such as acoustic emission and laser interferometry, offer exceptional temporal resolution during deformation. However, establishing a quantitative link between these surface observables and the underlying dislocation dynamics remains a significant challenge. In this work, we introduce a novel computational framework based on ensemble variational data assimilation to infer plastic strain localization and dislocation dynamics from high-frequency surface velocity measurements. We validate the method using synthetic data generated from three-dimensional discrete dislocation elastodynamics simulations. Our results show that the approach accurately reconstructs plastic strain localization patterns. This framework opens a new pathway for harnessing high-resolution surface measurements to uncover dislocation behavior at spatio-temporal scales previously inaccessible to direct observation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Modeling and Simulation, |