| About this Abstract |
| Meeting |
TMS Specialty Congress 2025
|
| Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
| Presentation Title |
A High-Fidelity Fatigue-Life Modeling Framework Using Fast Fourier Transforms |
| Author(s) |
Nathan Searle, Krishna Logakannan, Laura Vietz, Benjamin Anglin, Ashley Spear |
| On-Site Speaker (Planned) |
Nathan Searle |
| Abstract Scope |
Early stages of fatigue crack evolution typically dominate total fatigue life and contribute to observed scatter in total life among components. Current fatigue modeling techniques at microstructure scale focus primarily on predicting either crack initiation or microstructurally small crack (MSC) propagation, relying on overly-conservative assumptions to then estimate total fatigue life. Development of a method that incorporates both initiation and MSC propagation stages of fatigue life has largely been prohibited by the computational costs of running more than a few cycles of loading, especially when using crystal plasticity-based finite element methods. Through use of Fast Fourier Transform (FFT) methods, this work aims to develop a framework that seamlessly integrates predictions of fatigue-crack initiation and subsequent MSC propagation in 3D polycrystals. By implementing back stress, fatigue indicator parameters, damage evolution, and crack propagation within a parallelized FFT code, the new framework enables computationally efficient, high-fidelity predictions of microstructure-sensitive fatigue crack evolution. |
| Proceedings Inclusion? |
Undecided |