| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Propagation of Microstructure-induced Fatigue Variability onto Stress Concentrations |
| Author(s) |
Gustavo Castelluccio, Farhan Ashraf |
| On-Site Speaker (Planned) |
Gustavo Castelluccio |
| Abstract Scope |
Crystal plasticity computational approaches have demonstrated good predictive capabilities to quantify fatigue crack nucleation variability in smooth samples. However, the origin of such variability is poorly understood due to the multiplicity of operative mechanisms. Moreover, the evaluation of stress concentrations usually requires full microstructure-sensitive computational analyses that are sometimes unfeasible or impractical. This work explores the mechanisms that can be attributed to the intra-granular fatigue crack response predicted by microstructure-sensitive models. Furthermore, we explore engineering approaches to propagate microstructure sensitivity computed from smooth samples onto different notch geometries. We employ a physics-based crystal plasticity model in Abaqus for aluminium to quantify fatigue indicator parameters that correlate with transgranular crack nucleation in smooth samples and notches. Our results estimate the crack evolution within grains and predict fatigue notch sensitivity. |
| Proceedings Inclusion? |
Planned: |