About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
Computation of Stress Intensity Factors by A Phase-Field Fracture Approach |
Author(s) |
William Huber, Mohsen Asle Zaeem |
On-Site Speaker (Planned) |
William Huber |
Abstract Scope |
Characterization of the stress intensity factor with respect to the crack length is essential in the prediction of fatigue crack growth. For simple crack cases, analytical solutions can reliably be used, however, this is not the case for situations involving complex or multiple crack paths. For the first time, we present a phase-field fracture-based approach for computing the stress intensity factor. Unlike other damage models, the phase-field approach to fracture is uniquely suited for this purpose due to the introduction of a regularized crack surface functional which converges to a discrete crack surface. We verify the numerical predictions with analytical solutions for different well-known crack cases. Further, we study the length scale sensitivity of the proposed model, showing its applicability for different sample sizes and crack lengths. Finally, a case of multiple site damage will be investigated to demonstrate the generality of the proposed approach. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, |