| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
| Presentation Title |
A Length-scale Independent Phase-Field Model for Quantitative Prediction of Ductile Fracture |
| Author(s) |
William Huber , Mohsen Asle Zaeem |
| On-Site Speaker (Planned) |
William Huber |
| Abstract Scope |
The phase-field approach for fracture in materials based on the Griffith theory, which features a diffusive approximation of the crack, has been recently extended to study ductile fracture. However, the existing models for ductile fracture show a severe dependence on the choice of the gradient length scale regularization parameter. The consequence of this effect is a diminished capability in quantitative prediction of the actual mechanical response of a material. To address this issue, we propose an improved phase-field model which considers an elastic strain energy threshold for softening through including the material properties related to fracture in the so-called degradation function. The extension to ductile fracture is made based on a plastic strain dependence on the damage threshold. The capabilities and the accuracy of this model are shown with numerical examples which are verified by analogous experiments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, |