| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
Effects of Local Length Scales on Estimation of Void Fraction Distribution from X-ray Tomography of Spall Damage in Metallic Samples |
| Author(s) |
Sharmila Nimbkar, Pedro D. Peralta |
| On-Site Speaker (Planned) |
Pedro D. Peralta |
| Abstract Scope |
A quantitative understanding of the evolution of damage due to spall in metallic materials and its relationship to microstructure is key to formulate and validate models for this important dynamic failure mode. Copper samples with different microstructures, from single crystals to polycrystals with different grain sizes, were shock loaded using flyer-plate impacts with pressures ~ 2 to 5 GPa. Samples were soft recovered and cross-sectioned to characterize spall damage via X-ray tomography at the Advanced Photon Source. A local homogenization scheme was then used to obtain void fraction as a function of position in 3-D and the spatial distributions were correlated to local length scales associated to microstructure and damage, e.g., grain and void size, as well as the size of the representative volume element used for homogenization. Comparisons with predictions from simulations with different damage models were used to obtain insight into model validation strategies using 3-D damage data. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Copper / Nickel / Cobalt, Other |