About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
Predicting Microstructure-Dependent Yield Behavior in Polycrystals Using a Stochastic Crystal Plasticity FEM Framework |
| Author(s) |
Naji Mashrafi, Matthew Beck |
| On-Site Speaker (Planned) |
Naji Mashrafi |
| Abstract Scope |
Microstructural heterogeneity in additively manufactured materials complicates prediction of macroscopic yield behavior, particularly due to mesoscale interactions between grains. In this work, we employ a crystal plasticity finite element (CPFE) framework leveraging model representative volume elements (mRVEs) generated via the Kentucky Random Structures Toolkit (KRaSTk) to resolve heterogeneous deformation and investigate how mesoscale microstructural features govern yield stress in polycrystalline materials. Statistical ensembles of mRVEs are analyzed to characterize distributions of local stresses and strains to enable identification of the mechanisms governing the onset of plasticity. Results demonstrate strong correlations between mesoscale microstructural descriptors and effective yield stress, emphasizing the critical role of grain-scale interactions in governing macroscopic response and establishing a computational framework for microstructure-informed prediction of yield behavior in complex polycrystals. |