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 |
Full-Field and Mean-Field Strain-Gradient Crystal Plasticity Models for Predicting Geometrically Necessary Dislocations and Length-Scale Dependent Mechanical Response |
| Author(s) |
Marko Knezevic |
| On-Site Speaker (Planned) |
Marko Knezevic |
| Abstract Scope |
The presentation will begin by summarizing a full-field strain-gradient (SG) crystal plasticity finite element (CPFE) model, which considers the roles of microstructural length-scales. The potential and utility of the model to simulate mechanical response, strain gradients, and associated slip-system level geometrically necessary dislocations (GNDs) will be demonstrated via a few simulation case studies involving a set of strain-path change deformations of AA6016. A verification of the predicted GNDs will involve comparisons with those observed using 3D structures extracted, via serial sectioning, following application of the strain paths. A key limitation of such SG-CPFE modeling pertains to the scale and requirements for microstructural meshes of explicit grain structures. The subsequent part of the presentation will describe a formulation of a homogenization-based SG formulation linking micro-scale single-crystal to meso-scale polycrystalline aggregate to macro-scale component level modeling of geometrical shape changes under complex deformation boundary conditions while predicting mechanical response and microstructural evolution. |
| Proceedings Inclusion? |
Planned: |