| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Micromechanical Methods for Parameterizing Ceramic Failure Models |
| Author(s) |
Daniel Magagnosc, Andrew Tonge |
| On-Site Speaker (Planned) |
Daniel Magagnosc |
| Abstract Scope |
Development of material failure models remains an outstanding challenge particularly for dynamic loading conditions. Brittle materials represent an especially difficult case owing to the inherently stochastic nature of failure. Advanced ceramic material models account for the variability in the local failure strength of the material by assigning a size dependent distribution of failure strengths in each sub-volume of a larger calculation. Historically these strength distributions were fit to macroscale experimental data that can suffer from small sample sizes and a large difference between the specimen and representative element size scales. To circumvent these challenges and interrogate the underlying material properties a micromechanical testing methodology is employed. A series of microscale tension and compression experiments are performed on hot-pressed SiC and B4C. Using these experimental inputs, a framework for parameterizing a dynamic ceramic failure model is developed. The efficacy of the modeling framework is demonstrated through computer simulations of impact loading. |
| Proceedings Inclusion? |
Undecided |