About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Understanding the Implications of Finite Specimen Size on the Interpretation of Dynamic Experiments for Polycrystalline Metals through Direct Numerical Simulations |
Author(s) |
Bryan Zuanetti, Darby Luscher, Cynthia Bolme, Kyle Ramos |
On-Site Speaker (Planned) |
Bryan Zuanetti |
Abstract Scope |
Normal and Pressure-shear plate impact (NPI and PSPI) are popular techniques for studying the mean-field macroscopic behavior of polycrystalline metals under high rate loading. However, since both configurations rely upon geometry for imposing high rates, these experiments involve a limited specimen size. Moreover, because of inherent heterogeneities in polycrystalline metals, it is difficult to ascertain when the size is large enough for making representative inferences from point measurements. Presently, we quantify the expected variability in observable point measurements by performing direct numerical simulations of synthetic microstructures subjected to NPI and PSPI. Our analysis demonstrates that the grain size correlates directly with the variation in point measurements, showing a decrease in variation to zero (i.e. point measurements approach the mean-field value) with decreasing grain size. We discuss the reasoning and summarize the results into a framework for assessing the required number of grains per characteristic length for minimizing scatter in NPI/PSPI. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Mechanical Properties, Modeling and Simulation |